Systems Administrator III; Digital Ecosystem

At PMAT, we work on mission critical systems that directly support the warfighter, designing, building, and securing modern digital capabilities across cloud, data, and software environments. Our teams tackle complex, real-world challenges where delivery matters more than theory, and innovation is driven by curiosity, collaboration, and purpose.

In this role, you’ll contribute to Naval Operational Architecture (NOA), working alongside engineers and operators to deliver resilient, forward-leaning solutions in support of national defense.

About the role:

PMAT is seeking a highly experienced System Administrator III to provide senior-level administration, sustainment, troubleshooting, security hardening, and technical leadership across Windows, Linux, virtualization, network, and tactical computing environments. This role supports the stability, security, performance, and availability of servers, systems, network infrastructure, and mission-focused IT environments while helping guide remediation, patching, compliance, backup and recovery, monitoring, and infrastructure improvement efforts.

The candidate will work closely with IT, cybersecurity, engineering, data, cloud, and operational teams to support secure enterprise and tactical systems in government or defense-related environments. The role requires senior-level technical judgment, hands-on administration expertise, strong communication skills, and the ability to support both technical execution and team coordination.

Responsibilities:

• Lead and support administration of Windows, Linux, ESXi, network, and tactical computing environments by managing installation, configuration, updates, monitoring, troubleshooting, optimization, and sustainment activities.
• Implement and maintain security hardening across systems and network infrastructure by supporting CMMC alignment, DISA STIG implementation, vulnerability remediation, patching, access control, threat monitoring, and secure configuration management.
• Assess, research, and remediate vulnerabilities by investigating exploits, evaluating cyber risk, coordinating recommended fixes, applying security updates, and documenting remediation actions.
• Develop, implement, and maintain backup and recovery procedures to protect data, preserve system availability, validate recovery processes, and support continuity of operations.
• Manage and troubleshoot network infrastructure, including routers, firewalls, VPNs, network devices, connectivity issues, routing, DNS, DHCP, and related enterprise or tactical network services.
• Support tactical systems and data architecture by troubleshooting tactical environments, deploying and monitoring tactical data pipelines, improving data flow reliability, and supporting edge server, embedded GPU, and containerized workloads.
• Monitor infrastructure products, hardware, software, licenses, system performance, compatibility, and End-of-Life considerations to support sustainment planning and infrastructure modernization.
• Provide senior-level coordination and technical guidance to administrators, end users, cybersecurity teams, engineers, and program stakeholders by documenting technical solutions, mentoring team members, communicating status, and supporting issue resolution.

About Us:

PMAT is an innovative small business founded with a passion for developing forward-leaning solutions from exceptional people that increase the mission’s capability. We focus on designing and building impactful digital solutions that utilize modern cloud, data, and software concepts. Our passion is working on complex and progressive challenges such as edge platform computing, containerizing legacy platforms, distributed data platforms, or heterogeneous data analysis.

We recruit, retain, and foster a team motivated to pursue passions, investigate new ways of doing things, and embody an innovative and entrepreneurial spirit. We believe in being curious about every element of a problem and experiment relentlessly. We foster continuous learning in an environment that encourages positive collaboration and expands our capabilities. We tap into collective intelligence, acknowledging that the most brilliant people…