Prior to his legal career, Mr. Tierney served as a NASA engineer for 10 years. At NASA he worked in R&D for optical remote sensing systems, laser remote sensing systems, and spacecraft on-board navigation software. Other industry experience includes developing algorithms and software for digital signal processing, phased antenna array calibration, antenna beamforming, and radio direction finding. He has a Law Degree from the George Mason University School of Law and a Masters Degree in Applied Physics from Johns Hopkins University. Undergraduate degrees include a BS in Electrical Engineering and a BA in International Studies, both from George Mason University.