Background: Mark Reed Levin (; born September 21, 1957) is an American lawyer, author, and radio personality. He is the host of syndicated radio show The Mark Levin Show, as well as Life, Liberty & Levin on Fox News. Levin worked in the administration of President Ronald Reagan and was a chief of staff for Attorney General Edwin Meese. He is president of the Landmark Legal Foundation, has authored seven books, and contributes commentary to various media outlets such as National Review Online.
Context: Mark Reed Levin, one of three boys, was born in Philadelphia, Pennsylvania, and grew up in Erdenheim as well as Elkins Park, Pennsylvania. His father, Jack E. Levin, is the author of several books. He graduated from Cheltenham High School after three years in 1974. After high school, Levin enrolled at Temple University Ambler and graduated summa cum laude and Phi Beta Kappa with a B.A. in Political Science in 1977 at age 19. Levin won election to the Cheltenham school board in 1977 on a platform of reducing property taxes. In 1980, Levin earned a J.D. from Temple University Beasley School of Law. Levin worked for Texas Instruments after law school. He is Jewish.  Beginning in 1981, Levin served as an adviser to several members of President Ronald Reagan's cabinet, eventually becoming the associate director of presidential personnel and ultimately chief of staff to Attorney General Edwin Meese; Levin also served as deputy assistant secretary for elementary and secondary education at the U.S. Department of Education, and deputy solicitor of the U.S. Department of the Interior. He practiced law in the private sector and is president of Landmark Legal Foundation, a public interest law firm founded in 1976 with offices in Kansas City, Missouri and Leesburg, Virginia.  Levin has participated in Freedom Concerts, an annual benefit concert to aid families of fallen soldiers, and uses his radio program to promote aid to military families. Levin is also involved with Troopathon, a charity that sends care packages to soldiers serving overseas. In 2001 the American Conservative Union awarded Levin its Ronald Reagan Award. He was awarded the inaugural Citizens United Andrew Breitbart Defender of the First Amendment Award at CPAC in 2014.  Politico reported in 2014 that Levin was president of a legal non-profit and drew a salary of more than $300,000 a year.
Question: What type of work did he do?

Answer:
Beginning in 1981, Levin served as an adviser to several members of President Ronald Reagan's cabinet,