Systems Administrator III; Digital Ecosystem) Security Clearance

Position: Systems Administrator III (Digital Ecosystem) with Security Clearance
Precise Systems delivers integrated, mission-ready solutions that advance warfighter readiness and strengthen our nation's most critical defense programs. Through the power of our combined capabilities, we provide deep expertise in Advanced Engineering;
Digital Transformation;
Electromagnetic Warfare;
Interactive Training & Simulation;
Physical Sciences Research;
Platform Lifecycle Support; and Foreign Military Sales. Unified by decades of trusted performance and expanded through strategic growth, our team applies innovative technologies, engineering rigor, and customer-focused execution to solve complex challenges and accelerate mission success. Guided by our commitment to partnership, precision, and performance, we deliver the scalable solutions and technical excellence our customers depend on-today and into the future.

Precise 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. This role requires in-person support. Duties:
* 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. Required

Education:

* Bachelor's Degree or Equivalent Experience
* Current Security+ Certificate

Required Experience:

* Extensive experience in system administration, network administration, IT infrastructure, tactical systems support, or related technical infrastructure roles.
* Strong experience administering Windows and Linux operating systems, including Red Hat, CentOS, Rocky Linux, or similar enterprise Linux environments.
* Experience managing servers, virtualization environments, network infrastructure, VPNs, hardware, software, system updates, backup and recovery, monitoring, and troubleshooting activities.
* Strong understanding of cybersecurity, access control, vulnerability remediation, patch management, system hardening, network hardening, and secure configuration practices.
* Experience supporting enterprise, tactical, government, military, or mission-focused IT environments requiring high standards for security, reliability, and compliance.
* Strong understanding of networking concepts and protocols such as TCP/IP, DNS, DHCP, VPNs, routing, firewalls, ports, and network troubleshooting.
* Strong analytical, problem-solving, time management, multitasking, and prioritization skills in a fast-moving technical environment.
* Strong written and verbal communication skills with the ability to explain technical issues, risks, remediation actions, and recommendations to IT, cybersecurity, engineering,…