Harris N. Miller, former Democratic congressional candidate in Northern Virginia, has formed Harris Miller & Associates, a government relations firm located in the USA Today building in Rosslyn. Miller, also a former congressional staff aide and Carter administration official, said his firm will work in a wide range of policy areas.

Siddall, Matus & Coughter Inc., a Vienna-based advertising and public relations firm whose clients include Riggs National Bank and Virginia's Center for Innovative Technology, announced that Robert Hills, formerly a senior counselor with Burson-Marsteller, has joined the firm to head its Washington operations and to manage its public relations activity nationally.

Phyllis S. Corbitt, formerly head of the Energy Department's conference coordination branch and the Environmental Protection Agency's speakers' bureau, has been elected president of the newly formed Capital Speakers Inc., a group that arranges for speeches by high-level executives and professionals.

Bill Aber, who has served as general manager of Home Team Sports since the cable network's inception in 1983, has been given the added title of vice president of Group W Satellite Communications, a division of Westinghouse Electric Co. that owns the network. Home Team Sports also named Glenn Consor advertising sales manager.

WRC-TV, Channel 4, has named Laurence H. Tompkins sales director, replacing Allan Horlick, who was recently appointed station manager of WMAQ-TV, the NBC-owned station in Chicago.

James C. Kennedy, formerly with Booz, Allen & Hamilton Inc., and Laura H. Capaldini, previously with MCI Telecommunications Corp., have joined the Telecommunications Group Inc.