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John DeSimone joined Raytheon IIS, Dulles, Virginia, as vice president of Cybersecurity and Special Missions.

Mosaic451, Phoenix, appointed Ray Ramella, a former U.S. Marine Corps chief prosecutor, as general manager.

OneLogin, San Francisco, added Brad Brooks as CEO; Thomas Pedersen will become chief technology officer.

The Nerdery, Minneapolis, hired R.J. Nicolosi as president.

RG, Alexandria, Virginia, named Jeff Mohan to lead subsidiary RGServicesCorp (formerly PMTelco).

AXT Inc., Fremont, California, appointed Wilson Lin, Ph.D., chief operating officer.

PASSUR Aerospace Inc., Stamford, Connecticut, hired Tim Campbell as executive vice president of innovation and customer advocacy.

Huntington Ingalls Industries, Newport News, Virginia, named Don Godwin vice president of business management and chief financial off