John S. Crispin has been appointed Intelsat's director of operations, succeeding William Gedds, who retired after seven years with the organization. Intelsat is a nonprofit cooperative of 109 countries that owns and operates the global communications satellite system used for international and domestic communications. Crispin, who joined the organization in September 1984 as director of business planning, will now assume responsibility for planning, directing, executing and coordinating activities related to communications operations.

As part of a major realignment to strengthen the company's new and existing businesses, Communications Satellite Corp. (Comsat) has announced the appointment of Coleman Guthrie as vice president and general manager of Intelsat Satellite Services and David Beddow as vice president and general manager of Comsat Technical Services -- two of the company's new space communications divisions. In a related development, Comsat Telesystems announced that Alan G. Korobov has been elected as the company's new vice president for finance and that Myles Mutnick has been promoted to the newly created position of controller. Comsat General Corp. announced that David Preiss has been elected vice president of finance.

Journalist Hodding Carter, lawyer Ronald Goldfarb, and producer Christopher Koch have created MainStreet, a new television production company based in Washington. The company was formed to produce documentaries, news specials and public affairs programming. Currently, MainStreet and Washington PBS affiliate WETA-TV are coproducing a weekly public affairs series called "Capitol Journal," which focuses on Congress.

Chesapeake & Potomac Telephone Cos. has appointed James G. Cullen vice president of revenue and external affairs doe the four C&P companies serving the District, Virginia, Maryland and West Virginia. Cullen formerly served as vice president of Bell Atlantic Management Services Inc., a subsidiary of Bell Atlantic Corp. Bell is the parent company of C&P.