Tennessee, United States, June 2025 – Rebecca Sisk has taken on the role of Chief Human Resources Officer at Consolidated Nuclear Security, LLC (CNS), bringing with her a wealth of experience in HR leadership and operations. In her new capacity, she will be responsible for shaping and executing the organization’s HR strategy, supporting critical national security operations, and strengthening the company’s culture and talent management frameworks.
Prior to joining Consolidated Nuclear Security, LLC, Rebecca Sisk served as Director Human Resources (CHRO) at MSTS LLC, a Honeywell, Jacobs, and SN3 Joint Venture, for nearly eight years in the Las Vegas Metropolitan Area. She was instrumental in developing HR practices aligned with the organization’s mission, focusing on talent acquisition, employee engagement, and organizational development.
Before MSTS, Rebecca built an impressive tenure of nearly 17 years at Jacobs, where she held several HR roles of increasing responsibility. As a Recruiting Operations Specialist and previously as an Employment & Compensation Specialist and EEO/AA Officer, she provided comprehensive HR support for over 25 DoD and NASA contract groups and worked extensively at Arnold AFB, Tennessee. Her expertise in HR consultation, compliance, compensation, and recruitment supported Jacobs’ large federal contracting operations.
Rebecca’s early experience includes over 11 years supporting HR operations at Arnold Air Force Base, where she helped implement and lead key HR initiatives to enhance the effectiveness of mission-critical teams.
Rebecca’s collective experience across MSTS, Jacobs, and federal projects demonstrates a deep commitment to public sector HR excellence, compliance, and operational effectiveness.
About Consolidated Nuclear Security, LLC
Consolidated Nuclear Security, LLC (CNS) operates the Y-12 National Security Complex in support of the National Nuclear Security Administration (NNSA), ensuring the safety, security, and effectiveness of the nation’s nuclear arsenal. CNS comprises member companies Bechtel National, Inc.; Leidos; ATK Launch Systems; and SOC LLC, with Booz Allen Hamilton, Inc. as a teaming subcontractor. The organization’s senior management team brings extensive industry experience to address the unique challenges of managing a world-class nuclear security facility. CNS is recognized for its commitment to national security, operational excellence, and the safety and well-being of its workforce.
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