Jenner had a history of representing figures from Jack Rubenstein's (AKA Jack Ruby) criminal milieu, such as Allen Dorfman, an insurance agency owner, and consultant to the International Brotherhood of Teamsters (IBT) Central States Pension Fund who was a close associate of longtime IBT President Jimmy Hoffa, and associated with organized crime via the Chicago Outfit.
[1] Jenner was counsel for General Dynamics in 1963 when it was deeply involved in a series of scandals in Texas that were exposed by the U.S. Department of Justice.
[1] In the early 1950s, President Harry S. Truman appointed Jenner to the Civil Service Commission Loyalty Review Board, which had been established by Executive Order 9835 in 1947.
In 1960, the Supreme Court of the United States appointed Jenner to the Advisory Committee for the Federal Rules of Civil Procedure, a post he would hold until 1970.
Along with Wesley J. Liebeler, Jenner was appointed and performed the "Area III" assignment, "Lee Harvey Oswald's Background.
In 1968, Lyndon B. Johnson appointed Jenner to the U.S. National Commission on the Causes and Prevention of Violence, which Johnson established in the wake of the assassinations of Martin Luther King Jr. and Robert F. Kennedy to study the causes of violence in the U.S. 1968 also saw Jenner argue his first major case at the U.S. Supreme Court, Witherspoon v. Illinois.
Clifford thought Jenner would be a more acceptable candidate for Senate Republicans than Thornberry and help make them more amenable to Fortas as Chief Justice.
[4] Jenner represented Lester Crown, president of Material Service Corporation, in a 1972 bribery scandal and obtained for client immunity from prosecution in exchange for cooperating with the grand jury.
A longtime opponent of the House Un-American Activities Committee, Jenner played a role in its 1975 abolition after he filed a First Amendment challenge to HUAC in response to its investigation of Dr. Jeremiah Stamler, a prominent Chicago heart researcher.
[8] In the course of his career, Jenner also served as a director of General Dynamics; as a permanent member of the editorial board of the Uniform Commercial Code; and the chairman of the Committee on the Federal Judiciary of the American Bar Association.
When the wounds were deep and grievous for all Americans, when some impoverished soul was threatened, when some unpopular cause would have been extinguished but for the bravery and perseverance of that man, they all reached out for Bert Jenner.