Senior Network and Computer Systems Administrator

Wood River Federal•San Antonio, TX

About The Position

The Senior Network and Computer Systems Administrator is a highly experienced subject matter expert and lead technical authority responsible for the architectural design, implementation, and high-level maintenance of enterprise server and network infrastructure. The role ensures the security, availability, and performance of critical back-end systems; leads infrastructure projects; serves as the final escalation point for complex technical issues; and mentors junior and journeyman administrators. The position also handles long-range planning, capacity management, and continuous infrastructure improvement aligned with organizational goals and security mandates. The administrator designs and leads major infrastructure initiatives, evaluates technologies and recommends architectural improvements, documents system and network architecture, and conducts capacity planning and performance tuning. The role includes advanced enterprise systems and network administration, virtualization management, patch strategy, backup and disaster recovery leadership, and security and compliance implementation for DoD and Air Force requirements. The administrator also oversees vulnerability remediation, supports audits and assessments, establishes operating procedures, and serves as a technical lead on cross-functional teams.

Requirements

Seven to ten years of progressive, hands-on experience in systems and network administration.
At least three years of experience in a senior or lead administrator role, with responsibility for architectural design and leading infrastructure projects.
Demonstrated experience managing complex, enterprise-level virtualization environments.
Current certification meeting DoD 8140 requirements for IAT Level II or IAT Level III; CompTIA Security+ CE is listed as required for IAT II.
At least one advanced, relevant computing-environment certification.
Expert-level knowledge of virtualization platforms; VMware is preferred.
Advanced proficiency with enterprise storage systems, including SAN/NAS.
In-depth knowledge of network architecture and protocols, including routing such as OSPF and BGP, switching, and firewalls.
Expertise managing Microsoft Windows Server environments at enterprise scale, including Active Directory, DNS, and Group Policy.
Strong scripting skills for automation, such as PowerShell.
Must be able to obtain and maintain a DoW Security Clearance.

Nice To Haves

CASP+ CE or CISSP certification for IAT Level III.
Cisco CCNA or CCNP certification.
Microsoft Azure Administrator Associate certification if cloud-focused, or Windows Server Hybrid Administrator Associate certification.
VMware virtualization platform experience.

Responsibilities

Design, lead, and implement major infrastructure projects, including virtualization upgrades, SAN migrations, and network backbone refreshes.
Evaluate new technologies and recommend architectural improvements and technology refresh cycles to leadership.
Develop and maintain network and system architecture documentation, including diagrams, configuration standards, and disaster recovery plans.
Perform capacity planning and performance tuning to support future growth and performance requirements.
Serve as the final Tier 3 escalation point for complex and persistent system and network outages and performance degradation.
Manage the enterprise virtualization environment, including host configuration, high availability, and performance monitoring.
Develop and manage the patch management strategy, ensuring timely and secure patching while minimizing operational impact.
Lead implementation and management of enterprise backup and disaster recovery solutions, and oversee regular disaster recovery testing.
Lead technical implementation and validation of security controls to meet DoD and Air Force requirements, including RMF and STIGs.
Interpret security mandates and develop plans for system hardening and configuration management.
Oversee the infrastructure team's vulnerability management program, analyze complex vulnerabilities, and direct remediation efforts.
Collaborate with cybersecurity teams during audits and security assessments, providing technical evidence and expertise.
Provide technical leadership, on-the-job training, and mentorship to junior and journeyman administrators.
Establish and enforce standard operating procedures for system and network administration.
Act as a technical lead on cross-functional project teams and provide infrastructure guidance.