George W. Fredenburg Jr., 44, a management consultant and former Peace Corps officer who lived in Chevy Chase, was killed Nov. 11 in a multiple collision on the Capital Beltway involving three trucks and four passenger vehicles.

A spokesman for the Maryland State Police said six other persons were injured in the accident. Police said it began when a truck driven by a Ridgeway, Va., man veered from its lane and swerved across two lanes of traffic, "vaulted" the median, and landed on its side. According to police, the accident is still under investigation.

Mr. Fredenburg was a native of Cambridge, Mass., and a graduate of Merrimac College in Andover, Mass. During the 1960s, he lived in the Washington area and was a Peace Corps liaison officer with organized labor, a project director with Litton Industries, and worked for A.L. Nellums Associates.

From 1971 to 1981, he lived in California where he became employment programs director for Alameda County. He then returned here and was a management consultant with the Trans-Century Corp. in Washington at the time of his death. He worked in areas involving manpower training.

Mr. Fredenburg was a member of All Saints Episcopal Church in Chevy Chase and active in its preschool program.

Survivors include his wife, Joann, a daughter, Michelle, and a son, George III, all of Chevy Chase; his father, George W. Sr., of Oakland, Calif., and two sisters, Joan Cariglia of Storrs, Conn., and Mary Etta Verdesca of Naples, Fla.