Darryl Colvin has rejoined the Program Executive Office for Missiles and Space as a project manager.

On Thursday he took the helm of the Lower Tier Project Office, responsible for leading the Patriot, PAC-3, Missile Segment Enhancement, JTAGs, and the U.S. Medium Extended Air Defense System programs.

He previously served as the PEO Missiles and Space product manager for Field Artillery Launchers, including the Multiple Launch Rocket System M270 and M20A1 launchers and the High Mobility Artillery Rocket System.

Colvin retired as a lieutenant colonel in January 2006 after serving 20 years.

He has also served as an assistant professor of mechanical engineering at the U.S. Military Academy, where he taught Mechanical and Weapon Systems Design for three years.

He has a master's in metallurgical engineering from the Colorado School of Mines and a bachelor's in mining engineering from the University of Missouri at Rolla.