SMX is seeking a motivated and detail-oriented Linux/macOS Systems Administrator to support enterprise IT infrastructure onsite at NAS Patuxent River, MD. This position is responsible for administering, maintaining, and securing Linux and macOS systems across classified and unclassified environments.
The ideal candidate will have experience with Linux system administration, macOS endpoint management, and cybersecurity compliance. This role will leverage VMware Workspace ONE Unified Endpoint Management (UEM) to manage and secure endpoints while supporting daily operations, troubleshooting, and system maintenance.
We are looking for a self-starter who is comfortable working independently, learning new technologies, and collaborating with technical teams to support mission requirements.
Essential Duties & Responsibilities
- Install, configure, administer, maintain, and troubleshoot Linux and macOS operating systems across enterprise IT environments.
- Manage and secure Linux and macOS endpoints using VMware Workspace ONE Unified Endpoint Management (UEM).
- Develop, deploy, and maintain endpoint configurations, security policies, compliance profiles, and software packages.
- Implement and maintain DISA Security Technical Implementation Guides (STIGs) to support compliance with DoD cybersecurity requirements.
- Perform vulnerability assessments, analyze findings, and coordinate remediation activities using ACAS and other approved security tools.
- Monitor system performance, availability, and security to identify and resolve operational issues.
- Perform operating system updates, security patching, software installations, and routine system maintenance.
- Troubleshoot hardware, software, operating system, and network connectivity issues affecting Linux and macOS environments.
- Support the administration and maintenance of systems operating within classified and unclassified environments.
- Collaborate with cybersecurity, engineering, and infrastructure teams to resolve technical issues and implement system improvements.
- Maintain accurate system documentation, configuration records, standard operating procedures, and troubleshooting guides.
- Identify opportunities to improve system reliability, security, automation, and operational efficiency.
- Provide technical support to customers and stakeholders, ensuring timely resolution of incidents and service requests.
- Perform additional duties as assigned to support operational and mission requirements.
Required Skills & Experience
- Clearance Required: Top Secret
- Minimum of 3 years of professional experience in systems administration, IT infrastructure support, or a related technical field.
- Active CompTIA Security+ certification or equivalent DoD 8570 IAT Level II certification.
- Experience administering, configuring, and troubleshooting Linux operating systems, including RHEL, Ubuntu, or CentOS.
- Working knowledge of macOS administration, configuration, and troubleshooting.
- Experience with enterprise endpoint management, software deployment, and system maintenance.
- Understanding of DoD cybersecurity requirements, system hardening, and security compliance practices.
- Familiarity with DISA STIG implementation, vulnerability management, and remediation processes.
- Knowledge of networking fundamentals, operating system security, and troubleshooting methodologies.
- Strong technical troubleshooting, problem-solving, documentation, and communication skills.
- Ability to work independently, prioritize competing requirements, and collaborate effectively with technical teams.
- Ability to work onsite at NAS Patuxent River, MD, and support classified and unclassified computing environments.
Desired Skills & Experience
- Bachelor's degree in Information Technology, Computer Science, Cybersecurity, or a related technical field.
- Experience with scripting and automation using Bash, Python, PowerShell, or similar technologies.
- Familiarity with virtualization technologies, including VMware vSphere.
- Knowledge of enterprise identity and access management, including Active Directory, LDAP, and certificate-based authentication.
- Previous experience supporting DoD or federal government IT environments.
- Additional industry certifications, such as Red Hat Certified System Administrator (RHCSA), CompTIA Linux+, or relevant Apple administration certifications.
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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.
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).
Skills Required
- Top Secret security clearance
- At least 3 years of professional experience in systems administration, IT infrastructure support, or a related technical field
- Active CompTIA Security+ certification or equivalent DoD 8570 IAT Level II certification
- Experience administering, configuring, and troubleshooting Linux systems, including RHEL, Ubuntu, or CentOS
- Working knowledge of macOS administration, configuration, and troubleshooting
- Experience with enterprise endpoint management, software deployment, and system maintenance
- Understanding of DoD cybersecurity requirements, system hardening, and security compliance practices
- Familiarity with DISA STIG implementation, vulnerability management, and remediation processes
- Knowledge of networking fundamentals, operating system security, and troubleshooting methodologies
- Strong technical troubleshooting, problem-solving, documentation, and communication skills
- Ability to work independently, prioritize competing requirements, and collaborate with technical teams
- Ability to work onsite at NAS Patuxent River, Maryland, supporting classified and unclassified computing environments
- Bachelor's degree in Information Technology, Computer Science, Cybersecurity, or a related technical field
- Experience with scripting and automation using Bash, Python, PowerShell, or similar technologies
- Familiarity with VMware vSphere or other virtualization technologies
- Knowledge of Active Directory, LDAP, and certificate-based authentication
- Previous experience supporting DoD or federal government IT environments
- Additional certifications such as RHCSA, CompTIA Linux+, or relevant Apple administration certifications
SMX Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about SMX and has not been reviewed or approved by SMX.
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Fair & Transparent Compensation — Salary ranges are publicly listed on many postings and a pay transparency statement clarifies how location, contract, and credentials influence offers. This visibility helps set clear expectations around compensation.
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Leave & Time Off Breadth — About four weeks of PTO plus 11 paid federal holidays are highlighted in careers materials. Paid military leave on some roles further expands time‑off coverage.
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Retirement Support — A 401(k) with a dollar‑for‑dollar match on the first 5% and immediate vesting is called out in role descriptions. Traditional and Roth options support long‑term savings.
SMX Insights
What We Do
SMX is a global technology and advanced engineering provider specializing in Cloud Solutions, C5ISR, and Advanced Engineering / IT. Our tradition of delivering innovative, technical solutions dates back to 1995, however, you may know us better by one of our legacy company names: Trident Technologies, Smartronix, Datastrong, or C2S Consulting Group. With the support of OceanSound Partners, our private equity investment sponsor, we began operating as one business starting in 2019 and became SMX in 2021. We operate in close proximity to our clients around the globe and have core locations in Alabama, California, the DC Metro, Florida, Hawaii, Maryland, and Massachusetts. Today, as SMX, we are one team and together empower government and commercial enterprises to become more effective, innovative, and resilient, no matter what challenges they face. SMX offers competitive benefits, excellent work environments, and growth opportunities for our employees while continuing to expand operations and support our communities. We have more than 25 years of rapid and consistent growth with continuous recognition as an employer-of-choice technology company. In addition, we have earned coveted industry quality and business certifications; have a strong commitment to business partnerships, ethics, compliance, and sustainability; and have a multitude of premier contracting vehicles. The combination of these attributes allows us to provide sound, repeatable business solutions yet remain flexible and agile to quickly adapt to specific customer requirements. Committed to ensuring the highest levels of customer satisfaction, SMX is structured around the programs and technologies we support to provide optimal and seamless operations. We have maintained a reputation for excellence, helping to assure the missions of our Department of Defense, Public Sector, Fortune 1000, and other Government and commercial customers.
