Lockheed Martin-Chairman and Chief Executive Officer Bob Stevens has announced his retirement as CEO effective January 1, 2013. Subject to election by shareholders and approval by the board of directors, Stevens will remain Chairman through January 2014. A 25-year veteran of the company, he was appointed to his present role in 2004. The board has chosen President and Chief Operating Officer Chris Kubasik to succeed Stevens as CEO. Kubasik has served with Stevens in the executive office of the Chairman since 2011. The board has also elected Marillyn A. Hewson, Executive Vice President of the Electronic Systems business area, to succeed Kubasik as President and COO.

Micrel-Has promoted Robert Wahl to Managing Director of Worldwide Supply Chain Management and Backend Operations. In addition to the new position, Wahl will continue fulfilling the duties of his previous role as Director of the Global Supply Chain.

Rogers Corp.-Has appointed Jeffrey Grudzien as Vice President of its Advanced Circuit Materials Division. Grudzien, who joined Rogers in 2000, most recently served as Vice President of Global Sales and Marketing.

Symmetricom-Has appointed Dr. James Armstrong to the new role of Chief Technology Officer. Armstrong previously served as Executive Vice President and General Manager of the company's communications business segment.

LitePoint-Richard Hsieh has joined the company as Vice President and General Manager of its Taipei-based Taiwan operations. Hsieh spent 12 years with LitePoint's parent company, Teradyne, in various rolesmost recently as Taiwan Sales Director.

National Instruments-Has promoted Jin Bains to Vice President of Research and Development of RF products. Bains previously served as the company's Director of Research and Development.

Linwave Technology-Has appointed Neil Sparling to the role of Technical Director. Sparling has extensive experience in both component and system design.

Memsstar-Has named Mike Thompson Chief Executive Officer. Thompson replaces interim CEO Peter Connock, who remains with the company as Chairman of the Board. Thompson previously served as Chief Technical Officer and Chief Operating Officer at Replisaurus Technologies.

XMA Corp.-Has appointed James Doyle as the company's new President and Chief Executive Officer. Most recently, Doyle worked as the Congressional Affairs Liaison for Emerson Embedded Computing in Washington, DC.