Mario X. Sierra

Mario X. Sierra spent 31 years with the City of San Diego before retiring from his position as the Environmental Services Director. During his career, Mario served as the Director for four separate Departments including General Services, Transportation & Storm Water, and Department of Information Technology.

Mario also served as an Emergency Operations Center Director and has extensive, broad municipal government experience. Mario is a seasoned manager with extensive budgetary experience, contractual knowledge and strong negotiating skills. Prior to joining the City of San Diego, Mario worked for a Consultant and General Engineering Contractor. He received a B.S in Applied Mechanics & Engineering Sciences from the University of California San Diego and a Master of Public Administration from National University. Mario is a 2004 LEAD Graduate and a 2003 Graduate from the Chicano Federation Leadership Training Institute. Mario was active in professional organizations including American Public Works Association, US Conference of Mayors – Municipal Waste Management Association, League of California Cities – Environmental Quality Policy Committee and the Solid Waste Association of North America.

Mario has been active with nonprofit community organizations since high school including the Society of Hispanic Professional Engineers, Casa Familiar, MANA de San Diego and most recently served as the Chair for the Chicano Federation.