Harward reported to Surface Warfare Officer School in Newport with follow-on orders to the. After completion of a South American deployment in support of Unitas XXIV, he received orders to Basic Underwater Demolition/SEAL training at Naval Amphibious Base Coronado where he graduated as the honor man of BUD/S class 128 in July 1984. As a Navy SEAL officer Harward served as platoon commander in SEAL Team THREE and then completed a specialized selection and training course for assignment to Naval Special Warfare Development Group in 1988. Harward served as assault team leader and operations officer during which time he planned, rehearsed and operated during classified operations. Harward later earned a Master of Arts degree in National Security and Strategic Studies from the Naval War College. Harward served staff and command tours including Naval Special Warfare task group commander for Operation Desert Thunder in Kuwait; Joint Special Operations task force commander for Operation Rugged Nautilus; deputy commander of the Combined Joint Special Operations Task Force in support of Operation Joint Forge in Bosnia.; Special Warfare Plans officer for Commander Amphibious Forces U.S. Seventh Fleet; Aide-de-Camp to Commander-in-Chief, USSOCOM; executive officer of Naval Special Warfare Unit 1 and commanding officer SEAL Team THREE. As a Navy Captain, Harward assumed command of Naval Special Warfare Group ONE in August 2001 and deployed shortly after September 11 attacks, to Afghanistan. He commanded a special multinational task force CJSOTF-South, later renamed Task Force K-Bar and directed special reconnaissance and direct action missions throughout the country. In October 2002, Harward deployed as Commander, Task Force 561 where he commanded Naval Special Warfare Task Group Central in Iraq. His forces included all the assets in the Naval Special Warfare inventory as well as forces from the PolishGROM, the United Kingdom Royal Marines and the Kuwaiti Navy. Harward relinquished command of NSWG 1 in August 2003 and reported to the Executive Office of the President at the White House. He served on the National Security Council staff as the director of Strategy and Defense Issues. In April 2005, Harward was assigned to the new National Counterterrorism Center in Washington, as the Chairman, Joint Chiefs of Staff representative to the Senior Interagency Strategy Team. From June 2006 to July 2008, Harward served as the Deputy Commanding General, Joint Special Operations Command, Fort Bragg, North Carolina, and he served multiple combat tours in Afghanistan and Iraq. He considered himself proud of helping to improve the situation of women on his duty. On November 3, 2008, Harward assumed the position of Deputy Commander, United States Joint Forces Command. In 2011, Harward was reappointed to the rank of Vice Admiral and assigned to the position of Deputy Commander, United States Central Command led by General James Mattis. In October 2013, he was replaced by VADM Mark I. Fox. On August 19, 2013, Harward was presented the Distinguished Graduate Leadership Award by the U.S. Naval War College. Established in 1996 by the NWC Foundation, the award honors NWC graduates who have attained positions of prominence in the field of national security. Harward retired in November 2013 after 34 years of military service. In January 2014, he became the Chief Executive of Lockheed Martin United Arab Emirates. Following the resignation of Michael T. Flynn as National Security Advisor on February 13, 2017, journalists identified Harward as one of the principal candidates to replace him. President Donald Trump offered him the position on February 14, 2017. Harward declined the position on February 16. Media reports cited sources indicating that Harward was unable to agree with Trump over making his own appointments to his team. On September 4, 2019, Patriot One Technologies Inc., a threat detectiontechnology company, announced that Harward had joined the company's Senior Advisory Board.