Heads up the McCallum Group, a Sacramento-based lobbying firm specializing in but not limited to issues in higher education. The group lists over 40 community college districts in California as being clients and also worked on behalf of clients in health care, technology, financial services and real estate. He lobbies for employee associations including the California Association for Alcohol/Drug Educators and the California Correctional Peace Officers Association. Following the 2017 California firestorm, McCallum became a lead face and chief lobbyist for Up from the Ashes, an advocacy group focused on wildfire policy. A self-described coalition of wildfire survivors, Up from the Ashes was backed by heavyweight trial attorneys representing thousands of property owners against Pacific Gas and Electric Co., which at the time was in bankruptcy. He served as executive director of the Faculty Association of California Community Colleges, which grew from 1,600 members to over 9,000 members during his tenure. Before that, he worked for the U.S. Department of Labor. McCallum majored in international relations and economics at San Francisco State, then earned a master’s in public policy from Occidental College.