Design and construction of a LEED Gold facility that supports LBNL’s Advance Light Source (ALS) Building, which houses a specialized particle accelerator that generates bright beams of x-ray light for scientific research. The new 31,000 SF facility contains staging for experiments, labs, storage spaces, conference rooms and offices. Construction is slab-on-grade, light/heavy gauge metal framing with braced seismic frames, Centria metal panel exterior, TPO Duro-Last roofing over steel decking, and built-up membrane roofing to match the ALS Building. Scope also included providing access into the adjacent ALS building for the first and second floors, 20,000 SF of sitework consisting of tie-in points for utilities, plus associated work in Building B6 and cooling towers. The project was located adjacent to ongoing research facilities and required specialized construction means and methods to minimize disruptions. Overaa worked closely with LBNL on-site management and facilities group, resulting in no interruptions to on-going education and research.