Senior Network Administrator - Information Systems Security Manager
Company: PMAT
Location: San Diego
Posted on: February 19, 2026
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Job Description:
Job Description Job Description Salary: $125,000.00 -
$155,000.00 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 may not be in the room. Above all
else, we believe that delivering and demonstrating is more potent
than a sheet of paper. We are passionate about mission-centric
design and delivering effective capabilities to and for the
warfighter. Whether youre an experienced engineer or just beginning
your career, youll work alongside experts who are committed to
solving mission-critical problems. If youre passionate about using
your skills to make a real difference, apply today and become part
of a team thats shaping the future of defense technology! About the
role: PMAT is seeking a senior-level Network Infrastructure
professional to lead and sustain enterprise network operations
supporting both corporate and mission environments. This role is
responsible for ensuring the reliability, security, and performance
of PMATs network infrastructure while providing technical
leadership, strategic planning, and hands-on execution. The ideal
candidate brings deep technical expertise, sound judgment, and a
proactive mindset, with the ability to operate independently,
mentor others, and collaborate across internal teams and external
partners to deliver resilient, secure network capabilities.
Responsibilities: Lead network infrastructure operations, including
installation, configuration, and maintenance of network hardware
such as routers, switches, firewalls, VPNs, and wireless
environments across local and wide area networks (LAN/WAN). Ensure
the security, availability, and performance of network
infrastructure through continuous monitoring, routine maintenance,
and proactive issue resolution. Troubleshoot and resolve complex
network and system-wide issues, identifying root causes and
implementing sustainable solutions. Implement and manage network
security controls, including firewall rules, access controls, and
identity management solutions (e.g., Microsoft 365, Azure). Support
and maintain related systems, including servers, virtualization
environments, security cameras, and other network-connected
infrastructure. Create, maintain, and update comprehensive network
documentation, including system architecture diagrams,
configurations, standards, and operational procedures. Participate
in strategic planning efforts by contributing to network
architecture, technology roadmaps, standards, and policies. Provide
technical leadership, guidance, and mentorship to system
administrators and other technical staff. Serve as a technical lead
or project lead for network-related initiatives, upgrades, and
implementations. Coordinate with and manage vendors to procure,
deploy, and support network hardware and services. Required Skills
and Experience: Minimum 10 years of hands-on technical experience
in the following areas: Network infrastructure:Installing,
configuring, and upgrading network hardware like routers, switches,
firewalls, VPNs, and wireless environment. Maintenance and
monitoring:Performing routine maintenance and continuous monitoring
of network performance, availability, and security.
Troubleshooting:Diagnosing and resolving both common and complex
network and system-wide problems. Security:Implementing and
managing network security measures, including firewall rules and
user access controls (e.g., M365). Server and system
support:Managing and maintaining network servers, virtualization
environments, and other related systems. Documentation:Creating and
maintaining comprehensive network documentation, reports, and
system architecture diagrams. Strategic planning:Participating in
the development of network and technology strategies, standards,
and policies. Technical leadership:Providing technical direction
and training to other system administrators and technical staff.
Project management:Acting as a project leader for network-related
projects. Vendor management:Coordinating with and managing vendors
for hardware and services. Education and Certification
Requirements: Bachelors degree in Information Technology, Computer
Science, Engineering, or a related field, or equivalent combination
of education and professional experience CCNA or equivalent One of
the following IAM Level III certifications are required to meet the
DoD 8140/8570 requirement. CISSP CISM GSLC CCISO One of the
following preferred but not required. CAP CASP CCSP (cloud) CEH or
PenTest Citizenship and Clearance requirements: US Citizenship No
dual citizenship Active DOD Secret security clearance required
Active DOD TS (w/ SCI eligibility) security clearance preferred
Location: On-site Hancock Street and Ronson Court, San Diego, CA
Travel:10% Work Environment:PMAT offices as needed. In some cases,
work in a government facility may be required. Travel may be
required for customer engagement, team coordination, and
potentially for business development. PMAT is an equal-opportunity
employer.We believe in hiring a diverse workforce and sustaining an
inclusive, people-first culture.We are committed to
non-discrimination onanyprotectedbasis, such as disability and
veteran status, or any other basis covered under applicable law.
CJ
Keywords: PMAT, Bellflower , Senior Network Administrator - Information Systems Security Manager, IT / Software / Systems , San Diego, California
