[1] After graduating from law school, he moved to Washington and worked in the State Department's Office of the Legal Advisor.

He was promoted to legal advisor for Economic Affairs where he supervised matters relating to trade, participating in the drafting and negotiation of the Panama Canal Treaties and acting as the spokesman for the U.S. during the Intelsat conference.

[2] He was the State Department counsel to the Warren Commission's inquiry into the assassination of John F. Kennedy.

[6] Frank then went into private practice with the law firm of Wald, Harkrader & Ross where he represented, among others, the organization PSI.

He died in 2014 from progressive supranuclear palsy in an assisted living facility in Washington, DC.