Lieutenant Commander Arellano was commissioned as an Ensign at the US Naval Academy in 2001. After completing the Naval Nuclear Propulsion Program, he reported to the USS West Virginia (SSBN 736)(GOLD), where he served as Electrical Assistant, Communications Officer, and Assistant Operations Officer over the course of five strategic deterrent patrols. At the conclusion of his tour, he was selected for lateral transfer and re-designation as a Special Duty Officer (Cryptology), now Cryptologic Warfare Officer.
In 2006, his duty was at Navy Information Operations Command, Suitland, Maryland, as a Contracting Officer Representative for subsurface cryptologic carry-on equipment.
In 2009, he reported to Naval Special Warfare Group ONE in Coronado, California, where he served as the Future Operations and Tactical Information Operations Officer. During this period, he deployed to Iraq in support of OPERATION IRAQI FREEDOM and to a Joint Task Force in support of OPERATION ENDURING FREEDOM as the Chief of Operations.
In 2013, he was selected for special assignment at the US Special Operations Command Joint Communications Integration Element in Arlington, Virginia. Assignments included duty as Deputy Commanding Officer, Director of Intelligence, and deployed Cyber Mission Manager for a Joint Task Force in Afghanistan supporting OPERATIONs ENDURING FREEDOM and FREEDOM'S SENTINEL.
Lieutenant Commander Arellano holds a Bachelor of Science in Economics from the US Naval Academy and an Executive Master's in Business Administration from the Naval Postgraduate School. He is also a member of the Defense Acquisition Corps.
His personal awards include the Defense Meritorious Service Medal (second award), Navy and Marine Corps Commendation Medal (second award), and Navy and Marine Corps Achievement Medal (second award).