Doug Malmstrom

Probe Technology Services, Inc. designs, manufactures, and sells measurement tools and systems used in formation evaluation, and well integrity assessment and productivity determination for the energy industry worldwide. It offers cased hole tools, such as corrosion logging, cement integrity logging, thru casing evaluation logging, gamma ray and CCL logging, memory logging, surface acquisition systems, and auxiliary equipment and accessories; and open hole tools, including nuclear, resistivity, acoustic, and borehole geometry logging. The company was founded in 1994 and is headquartered in Houston, TX.

GEODynamics BV provides oil and gas exploration services. It offers commercial development and perforating technology to the global oil and gas industry. The company was founded in 2003 by David S. Wesson and is headquartered in Amsterdam, the Netherlands

Probe Holdings, Inc. engages in the design, manufacture, and sale of measurement tools and systems. It products is used for formation evaluation, well integrity assessment, and productivity determination. The company was founded in 1995 and is headquartered in Missouri City, TX.

GEODynamics, Inc. manufactures perforating equipment. Its offers GTEC which provides services such as charge development and optimization, charge performance benchmarking, perforating system development, customer specific tests and gun collapse testing, software simulation and technik services. The company was founded by David S. Wesson in 2004 and is headquartered in Millsap, TX.