SMX is seeking a driven and experienced Senior UNIX Administrator to support operations at the Patuxent River Data Center (PRDC). This individual will work alongside a team of UNIX/Linux Systems Administrators responsible for maintaining the integrity, availability, and security of mission-critical systems across Department of Defense (DoD) networks. The Senior UNIX Administrator will ensure systems are properly patched and configured in accordance with defined security baselines and hardening policies. Core responsibilities include resolving incidents and service requests in a timely manner and contributing to projects involving diverse systems and applications throughout the data center environment. Essential Duties & Responsibilities Support operating system and security patching efforts across multiple Department of Defense (DoD) enclaves Mentor and support junior UNIX/Linux System Administrators by providing technical guidance on task execution, project involvement, and adoption of new technologies Collaborate with other Data Center teams to design and implement Unix/Linux-based solutions that align with business and mission requirements Desired Qualifications Bachelor’s degree in a related technical field Experience with Red Hat Identity Management (IdM) or FreeIPA Broader exposure to AWS beyond core services Senior-level experience with Solaris system administration Application Deadline: 3/2/2026 #cjpost #LI-Hybrid The SMX salary determination process takes into account a number of factors, including but not limited to, geographic location, Federal Government contract labor categories, relevant prior work experience, specific skills, education and certifications. At SMX, one of our Core Values is to Invest in Our People so we offer a competitive mix of compensation, learning & development opportunities, and benefits. Some key components of our robust benefits include health insurance, paid leave, and retirement. The proposed salary for this position is: $87,000 — $146,000 USD At SMX®, we are a team of technical and domain experts dedicated to enabling your mission. From priority national security initiatives for the DoD to highly assured and compliant solutions for healthcare, we understand that digital transformation is key to your future success. We share your vision for the future and strive to accelerate your impact on the world. We bring both cutting edge technology and an expansive view of what’s possible to every engagement. Our delivery model and unique approaches harness our deep technical and domain knowledge, providing forward-looking insights and practical solutions to power secure mission acceleration. SMX is an Equal Opportunity employer including disabilities and veterans. Selected applicant may be subject to a background investigation and/or education verification. SMX does not sponsor a new applicant for employment authorization or immigration related support for this position (i.e. H1B, F-1 OPT, F-1 STEM OPT, F-1 CPT, J-1, TN, E-2, E-3, L-1 and O-1, or any EADs or other forms of work authorization that require immigration support from an employer).