Weisburd, a native Arkansan, joined the Foreign Service after earning his undergraduate degree, and he served in East Pakistan/Bangladesh from 1971 to 1973. He resigned in 1973 to enter law school at Michigan, where he was a notes editor on the Michigan Law Review. From 1976 to 1981, he was an associate with the Washington, D.C., law firm of Wilmer, Cutler & Pickering, his practice ranging from participation in the legal advisory team of the Constitutional Convention of the Northern Mariana Islands to pro bono first amendment work to defendants' securities and antitrust litigation. He teaches civil procedure, international law and a course on international human rights. He writes mainly in the area of international law.