Tishman Construction of the District named Thomas Rathburn first vice president, Michael Epp and Michael Baruccheri project manager, and Jonathan Brunelle assistant project engineer.
CGI Federal of Fairfax named Anne Laurent director in its thought leadership program.
SkyTerra of Reston named Gary Epstein executive vice president of law and regulation and Marc Montagner, former managing director and co-head of the global telecom group at Banc of America Securities, executive vice president of strategy, development and distribution.
Engineering Services Network of Arlington named Wesley Mandler president of the Northern Virginia Deltek GCS Premier User Group.
Mitre of McLean named James Cook vice president.
Group Goetz Architects of the District named Robert Sly, former project manager with Morris Architects in Orlando, associate principal and studio director of its commercial design practice.
Potomac Community Resources of Potomac named Stephen F. Riley executive director, Seth Duncan program director, and Abby Lubran volunteer and program coordinator.
AM General of Arlington named Daniel J. Dell'Orto, former principal deputy general counsel of the Department of Defense, senior vice president of general counsel and corporate secretary.
PositiveEdge Strategies of Chantilly named Mark Ennis vice president of its human capital division and Mark E. Zigo vice president of strategic development.
BBC & Associates of Bethesda named Christine Owens, former director of development at the Potomac School in McLean, senior associate.
The Magazine Group of the District named Michael Laxineta, former managing director for marketing and strategic planning at Tribune Media Net, senior vice president of sales and marketing.
Platinum Solutions of Reston named Burke Cox, former chief executive of Stelligent, chief technology officer.