David R. Ames
Directeur/Bestuurslid bij Global Energy Holdings Group, Inc.
Momenteel actieve connecties
| Naam | Geslacht | Leeftijd | Verwante bedrijven | Samenwerking |
|---|---|---|---|---|
| Jimmy L. Bobo | M | 62 |
Global Energy Holdings Group, Inc.
 Global Energy Holdings Group, Inc. Electric UtilitiesUtilities Global Energy Holdings Group, Inc. is a diversified renewable energy company. The company develops renewable energy projects, including biomass gasification and landfill-gas-to-energy projects. It also coordinates and implements energy-efficiency projects, such as cogeneration and heat recovery, for organizations that include government agencies and the U.S. military. The company was founded in 2000 and is headquartered in Atlanta, GA | 15 jaar |
| William Paul Behrens | M | 85 |
Xethanol Corp.
Global Energy Holdings Group, Inc.
Global Energy Holdings Group, Inc. Electric UtilitiesUtilities Global Energy Holdings Group, Inc. is a diversified renewable energy company. The company develops renewable energy projects, including biomass gasification and landfill-gas-to-energy projects. It also coordinates and implements energy-efficiency projects, such as cogeneration and heat recovery, for organizations that include government agencies and the U.S. military. The company was founded in 2000 and is headquartered in Atlanta, GA | 18 jaar |
| Robert L. Franklin | M | 86 |
Xethanol Corp.
Global Energy Holdings Group, Inc.
Global Energy Holdings Group, Inc. Electric UtilitiesUtilities Global Energy Holdings Group, Inc. is a diversified renewable energy company. The company develops renewable energy projects, including biomass gasification and landfill-gas-to-energy projects. It also coordinates and implements energy-efficiency projects, such as cogeneration and heat recovery, for organizations that include government agencies and the U.S. military. The company was founded in 2000 and is headquartered in Atlanta, GA | 17 jaar |
| Richard D. Ditoro | M | 86 |
Xethanol Corp.
Global Energy Holdings Group, Inc.
Global Energy Holdings Group, Inc. Electric UtilitiesUtilities Global Energy Holdings Group, Inc. is a diversified renewable energy company. The company develops renewable energy projects, including biomass gasification and landfill-gas-to-energy projects. It also coordinates and implements energy-efficiency projects, such as cogeneration and heat recovery, for organizations that include government agencies and the U.S. military. The company was founded in 2000 and is headquartered in Atlanta, GA | 19 jaar |
| Raymond G. Long | M | - |
The American Council On Renewable Energy
 The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 1 jaar |
| Paul Claxton | M | - |
Ithaca College
| 3 jaar |
| David Lissy | M | 57 |
Ithaca College
| - |
| Kathleen Weiss | F | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 10 jaar |
| Michael Giorgione | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Amanda Cimaglia | F | 40 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Kevin Gresham | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 3 jaar |
| Vishal Kapadia | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 1 jaar |
| Dan Foley | M | 56 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 13 jaar |
| Matt Ferguson | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 13 jaar |
| Nicholas Eisenberger | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 13 jaar |
| Doug Berven | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 13 jaar |
| Mike R. Fusselbaugh | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Jan Singer | F | 60 |
Ithaca College
| - |
| Thomas R. Salm | M | 83 |
Ithaca College
| - |
| Ja Kao | F | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| J. Read | M | 61 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Brian D. Dubenion | M | - |
Ithaca College
| - |
| Mona E. Dajani | F | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Melissa Ullerich | F | - |
National Ethanol Vehicle Coalition
| - |
| Warren Calderone | M | - |
Ithaca College
| - |
| Eric Rosario | M | - |
Ithaca College
| - |
| Lori Staba | F | - |
Ithaca College
| - |
| Greg Kimbell | M | - |
Ithaca College
| - |
| Gloria Hobbs | F | - |
Ithaca College
| - |
| Arthur Narr | M | - |
Ithaca College
| - |
| Gaurav Raniwala | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Bobby Hollis | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Monique Dyers | F | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 1 jaar |
| Laura Beane | F | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 3 jaar |
| Steven Paulik | M | - |
Global Energy Holdings Group, Inc.
Global Energy Holdings Group, Inc. Electric UtilitiesUtilities Global Energy Holdings Group, Inc. is a diversified renewable energy company. The company develops renewable energy projects, including biomass gasification and landfill-gas-to-energy projects. It also coordinates and implements energy-efficiency projects, such as cogeneration and heat recovery, for organizations that include government agencies and the U.S. military. The company was founded in 2000 and is headquartered in Atlanta, GA | - |
| Himanshu Saxena | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 3 jaar |
| Richard Palmer | M | 64 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Rose McKinney-James | F | 71 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 3 jaar |
| Gautam Chandra | M | 58 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| J. Murphy | M | 63 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 13 jaar |
| Joseph Francis Desmond | M | 59 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 13 jaar |
| Roger S. Ballentine | M | 59 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Kathleen A. McGinty | F | 60 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Stephen McCluski | M | 72 |
Ithaca College
| - |
| Michael Ware | M | 78 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 23 jaar |
| Robert Iger | M | 72 |
Ithaca College
| - |
| Thomas R. Casten | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Brian S. Appel | M | 66 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Rick Roth | M | - |
Ithaca College
| - |
| James Sneed | M | 57 |
National Ethanol Vehicle Coalition
| - |
| Mark Goodwin | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 8 jaar |
| Robert L. Pratt | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Hank Habicht | M | 70 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Bruce A. Pasternack | M | 76 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Kenneth Westrick | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| David Lebow | M | 62 |
Ithaca College
| 14 jaar |
| Matt Cheney | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 10 jaar |
| Gong Shan Zhu | M | 66 |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| William Demas | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | 1 jaar |
| Marcellina Offoha | M | - |
Ithaca College
| - |
| Neil Z. Auerbach | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Bill Paulsen | M | - |
National Ethanol Vehicle Coalition
| - |
| Rob Lamkin | M | - |
The American Council On Renewable Energy
The American Council On Renewable Energy Miscellaneous Commercial ServicesCommercial Services The American Council On Renewable Energy is a charitable organization that brings together finance, policy, and technology for the renewable energy sector. The non-profit company is based in Washington. The American company was founded by Gregory H. Kats, Andrew L. Shapiro, and Hank Habicht. The CEO is Gregory Wetstone. | - |
| Stephen Romaine | M | 59 |
Ithaca College
| - |
| Stephens Doug | M | - |
Ithaca College
| 2 jaar |
Relatiegrafiek
Connectie in verschillende bedrijven
Oude connecties
| Naam | Geslacht | Leeftijd | Verwante bedrijven | Samenwerking |
|---|---|---|---|---|
| Rom Papadopoulos | M | 64 |
Xethanol Corp.
Global Energy Holdings Group, Inc.
Global Energy Holdings Group, Inc. Electric UtilitiesUtilities Global Energy Holdings Group, Inc. is a diversified renewable energy company. The company develops renewable energy projects, including biomass gasification and landfill-gas-to-energy projects. It also coordinates and implements energy-efficiency projects, such as cogeneration and heat recovery, for organizations that include government agencies and the U.S. military. The company was founded in 2000 and is headquartered in Atlanta, GA | 1 jaar |
| Gil Boosidan | M | 52 |
Xethanol Corp.
Global Energy Holdings Group, Inc.
Global Energy Holdings Group, Inc. Electric UtilitiesUtilities Global Energy Holdings Group, Inc. is a diversified renewable energy company. The company develops renewable energy projects, including biomass gasification and landfill-gas-to-energy projects. It also coordinates and implements energy-efficiency projects, such as cogeneration and heat recovery, for organizations that include government agencies and the U.S. military. The company was founded in 2000 and is headquartered in Atlanta, GA | 1 jaar |
| Gary Wayne Flicker | M | 64 |
Xethanol Corp.
| 1 jaar |
| Franz A. Skryanz | M | 85 |
Xethanol Corp.
| 8 jaar |
| Michael E. Ellis | M | 67 |
Global Energy Holdings Group, Inc.
Global Energy Holdings Group, Inc. Electric UtilitiesUtilities Global Energy Holdings Group, Inc. is a diversified renewable energy company. The company develops renewable energy projects, including biomass gasification and landfill-gas-to-energy projects. It also coordinates and implements energy-efficiency projects, such as cogeneration and heat recovery, for organizations that include government agencies and the U.S. military. The company was founded in 2000 and is headquartered in Atlanta, GA
Xethanol Corp.
| 1 jaar |
| Steven Townsend | M | 71 |
Xethanol Corp.
Global Energy Holdings Group, Inc.
Global Energy Holdings Group, Inc. Electric UtilitiesUtilities Global Energy Holdings Group, Inc. is a diversified renewable energy company. The company develops renewable energy projects, including biomass gasification and landfill-gas-to-energy projects. It also coordinates and implements energy-efficiency projects, such as cogeneration and heat recovery, for organizations that include government agencies and the U.S. military. The company was founded in 2000 and is headquartered in Atlanta, GA | 1 jaar |
| Edwin L. Klett | M | 88 |
Xethanol Corp.
Global Energy Holdings Group, Inc.
Global Energy Holdings Group, Inc. Electric UtilitiesUtilities Global Energy Holdings Group, Inc. is a diversified renewable energy company. The company develops renewable energy projects, including biomass gasification and landfill-gas-to-energy projects. It also coordinates and implements energy-efficiency projects, such as cogeneration and heat recovery, for organizations that include government agencies and the U.S. military. The company was founded in 2000 and is headquartered in Atlanta, GA | 4 jaar |
| Marc J. Oppenheimer | M | 67 |
Xethanol Corp.
| - |
| Louis B. Bernstein | M | - |
Xethanol Corp.
| 1 jaar |
| Robin Buller | M | - |
Xethanol Corp.
| 3 jaar |
| Lawrence S. Bellone | M | - |
Xethanol Corp.
| 2 jaar |
| Thomas J. Endres | M | 67 |
Xethanol Corp.
| 2 jaar |
| Richard Wilson | M | - |
Xethanol Corp.
| - |
Statistieken
| Land | Connecties | % van het totaal |
|---|---|---|
| Verenigde Staten | 78 | 100.00% |
Ouderdom van de connecties
Actief
Verleden
Man
Vrouw
Besturend
Uitvoerend
Oorsprong van de connecties
- Beurs
- Insiders
- David R. Ames
- Persoonlijk netwerk