Consovoy McCarthy partner Jeffrey Harris will make his debut argument next month in the U.S. Supreme Court on behalf of two employers who contend federal civil rights laws do not protect LGBT workers from sexual orientation discrimination.

Harris, who clerked for Chief Justice John Roberts Jr. in the 2008 term, will appear Oct. 8 opposite Pamela Karlan, co-director of Stanford Law’s Supreme Court Litigation Clinic. The justices are scheduled to hear the closely watched cases Altitude Express v. Zarda and Bostock v. Clayton County, Georgia.