Frank was a great friend and a mentor to all, including other mentors. His technical expertise and engineering prowess, coupled with his extraordinary leadership and managerial skills, was unmatched. He was dedicated to our mission of tackling our nation's most challenging problems through the use of advanced phenomenologies and analytical techniques. I would often find Frank staying after a full day of work after hours taking care of business, long after all around him had departed for the day. What was really impressive was Frank himself. He was unflappable and, even when approached with the most trying circumstances and situations, he attacked them with great vigor, humor, and calmness. He would always be willing to impart his wisdom and experience with others, and personnel would walk away as if they had just learned another of life's great lessons. He had the innate ability to take the most complex and technical problem and convey it to myself and others who did not possess highly specialized degrees and explain it in easily digestible and understandable terms. This is a genuine art in itself. True to Frank's nature, he always dressed professionally and sported very eclectic and humorous ties that gave insight into his personality and fun-loving spirit. His tie collection must have taken a significant portion of his closet as they were all fantastic, finicky, and nerdish. Some say that everyone is replaceable, but that is not the case with Frank, as all will definitely miss his presence and expertise. He sometimes provided fatherly guidance to senior leaders, and if you were smart, you would listen. He often talked about his loving wife, and you could tell that they both adored pets. We all loved Frank as a brother in arms, friend, and consummate professional.