As Business Development Manager for L-3 Communications, Dr. Christiansen works to secure new business opportunities in the trace explosive detection industry. In addition to a solid foundation in reaction kinetics and thermodynamics required for this position, Dr. Christiansen also possesses significant expertise in surface chemistry, the synthesis of nanocomposite materials, nuclear magnetic resonance and chemical kinetics.

Prior to working in explosives detection, Dr. Christiansen spent five years in the fuel cell and hydrogen production industry and maintains active ties to this field. In April 2004 he was invited by Governor Bush to join a small, elite group of business professionals to form the Florida Hydrogen Business Partnership for helping the state to shape its hydrogen policies. In 2007, Sean joined the board of directors at the Orlando Science Center and accepted an invitation to join the Florida Energy Commission Advisory Group on Renewable Energy and Florida Solar Energy Center's Policy Advisory Board.

Dr. Christiansen is committed to "giving back" to a community in which he grew up in. He serves on the executive board of directors at the Adult Literacy League and volunteers as a science fair judge. He is a graduate of Leadership Orlando and a member of the Tiger Bay Club of Orlando.

Dr. Christiansen graduated with honors from the University of Notre Dame and earned a Bachelor's of Science in Chemical Engineering in 1996. In 2001, Dr. Christiansen received a Ph.D. in Chemical Engineering from the University of California at Santa Barbara.