 Alpine 4 Holdings Inc OTCQB:ALPP has said it is bringing on board retired US Air Force Technical Sargent Nathan Grier to work with its Vayu US Inc unmanned aerial systems subsidiary. Grier is the former programs director of the Counter Small Unmanned Aerial Systems C-sUASSmall Unmanned Aerial Systems s-UASNuclear Convoy for the US Air Force, where he established a UAV lab to research and test C-sUAS and sUAS technology projects. 