Two directors for planning and development at Space Communications Co. have left the Gaithersburg satellite communications firm for other local ventures. William D. Cavanaugh Jr., formerly director of business development at Spacecom, has been named senior vice president for business development at Comprehensive Technologies International Inc., a minority-owned high-tech engineering firm in Fairfax. And Jason C. O'Neil, who had been director of strategic planning, has been appointed manager of satellite programs for Defense Systems Inc., a small defense contractor based in McLean. Both O'Neil and Cavanaugh said their leaving was not related to the recent divestiture by Fairchild Industries Inc. of its 50 percent share in the company. A Spacecom spokesman said the company hasn't found replacements for the two directors.

Burson-Marsteller, an international public relations firm, recently announced two appointments in its Washington office: Susan Kennedy, formerly press secretary to Sen. Lowell P. Weicker (R-Conn.), has been named senior account executive for media relations. And Rebecca Halkias, previously with the law firm of Ballard, Spahr, Andrews & Ingersoll, has joined the firm as a government relations counselor.

The William Byrd Press, a Richmond-based printing firm, announced two promotions: John Phillips, formerly vice president of the firm's largest division, the Byrd Printing Group, has been named president of that division. C. Stephenson Gillispie Jr., previously vice president of its typesetting operation, Byrd Data Imaging Group, has been promoted to president of that group. Both Phillips and Gillispie will be one of four group presidents of Byrd's parent company, Cadmus Communications Corp.