The observatory sites are supported by science and engineering research facilities at MIT in Cambridge, MA and at Caltech in Pasadena, CA.As a senior member of the core Hanford Observatory Operations staff, the selectee will supervise and lead the group tasked with optimizing, maintaining and improving the site vacuum system and its supporting infrastructure. The LIGO Laboratory's mission spans a broad and vibrant array of activities related to gravitational-wave physics and astronomy, including detector operations, R&D toward detector improvements, gravitational-wave astrophysics, observatory operations, and education and public outreach.