Atomic Data and Foundation Technologies tap Chris Heim, ex-AbeTech, as joint CEO … Mynaric optical communications company announces departure of CFO Stefan Berndt von-Bulow for personal reasons; Chief Technology Officer Joachim Horwath and Mynaric Supervisory Board Chairman Bulent Altan assume CFO responsibilities during search ... TrustGrid, secure digital identity ecosystem provider, appoints Brett Kelsey, ex-Reveald, as COO … BearCom, integrator of voice, security and data tech, promotes Charla Crochet to senior vice president-field operations … Satcom Direct hires Tom Phillips, ex-Satcom Global, as regional director-Asia Pacific operations …Datamark provider of interoperable software for public safety location services, hires Tim Jenkins, ex-Commtech Telecom, as chief strategy officer.