C. Scott Hemphill, a Columbia Law School professor and former clerk to U.S. Supreme Court Justice Antonin Scalia, has been hired to run Attorney General Eric T. Schneiderman’s antitrust bureau. Mr. Schneiderman said that Mr. Hemphill’s “expertise in the complex area of antitrust law is broad and deep, as is his commitment to justice and fairness. He will be a tremendous asset to this office, and the people of New York State.”

Mr. Hemphill, a Phi Beta Kappa graduate of Harvard who also has a master’s degree in economics from the London School of Economics and Political Science, a law degree from Stanford—where he edited the law review—and a doctorate in economics from Stanford, clerked for Justice Scalia in 2003 and 2004. He clerked for Judge Richard A. Posner of the U.S. Court of Appeals for the Seventh Circuit in 2002 and 2003.

Mr. Hemphill, 38, has taught at Columbia since 2006 and became a full professor in 2010. According to his resume, his academic focus is “on the balance between the innovation and competition established by antitrust law, intellectual property and other forms of regulation.” He has written for the Columbia, Stanford and New York University law reviews, the Yale Journal on Regulation, the Columbia Business Law Review and the Federal Circuit Bar Journal.

Mr. Hemphill succeeds Richard Schwartz, who had been serving as acting bureau chief. Mr. Schwartz will remain in the office, according to Danny Kanner, a spokesman for the attorney general.