Zukunft was promoted to flag rank in 2006. His six previous flag assignments also include The Assistant Commandant for Marine Safety, Security and Stewardship; Director of Response Policy, Assistant Commandant for Capability; Commander, Eleventh Coast Guard District and Director, Joint Interagency Task Force West. Additionally, Zukunft served as the Federal On-Scene Coordinator for the Deepwater Horizon Spill of National Significance in 2010, and directed more than 47,000 responders, 6,500 vessels and 120 aircraft during one of the largest oil spills in U.S. history.