Mark E. Rosen, a international and national security lawyer by training, is a vice president and deputy general counsel at CNA Corporation. He provides corporate law support to CNA and international and national security support to clients, including the US Navy, the Office of the Secretary of Defense, the National Reconnaissance Office, and various nongovernmental organizations. Rosen’s particular expertise is in the maritime field, including boundary and maritime disputes, marine law enforcement, and governance of the global commons. Rosen has authored recent analyses of disputes in the East China Sea, the Sea of Japan, the Bay of Bengal, the Turkish Straits, and the South China Sea; he teaches at the George Washington School of Law and is a graduate of the University of Virginia School Of Law (LLM) and the University of Georgia (JD, AB). He was contributing editor at Intellibridge and a columnist for SEAPOWER magazine.