David Heller

Heller-Fahrdienste GmbH is a driving service company located in Marzahn-Hellersdorf, Berlin, Germany. The German company provides safe transportation services for students, including those with physical disabilities, to and from school. The private company also specializes in promoting mobility for disabled people, with numerous letters of recommendation from day care centers and workshops. The majority of their vehicles are equipped with safety-tested retention systems and their drivers are trained to meet the special needs of disabled people. The company was founded in 1990 and is led by CEO David Heller.

AKHAN Semiconductor, Inc. manufactures nanocrystalline and polycrystalline diamond based materials and devices. The company was founded by Adam Khan in 2013 and is headquartered in Gurnee, IL.