Thomas Shea, at ESS since 2012, has led the design update of the accelerator-to-target region, and is currently the Beam Diagnostics Section leader. With about 20 global partners, the Section designs and deploys proton beam instrumentation systems that provide diagnostic and protection capabilities throughout the accelerator. Since 1991, Thomas has managed technical organizations and projects of similar scale at US accelerator facilities, including for the Spallation Neutron Source at Oak Ridge National Laboratory and for the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. Previously, he held positions at Fermi National Accelerator Laboratory, Los Alamos National Laboratory and the University of Maryland. Thomas has chaired and participated in about 40 review panels, advisory boards, and program committees including for example, the US Department of Energy (DOE) Accelerator Stewardship committee and the Instrumentation Working Group at the DOE Workshop on Accelerator Physics for Next Generation Light Sources. Since graduating from Michigan State University (MS, Physics, 1986), he has published about 50 papers in journals and conference proceedings, primarily in nuclear physics, accelerator and controls technology and high-power targetry.