Senior Network and Computer Systems Administrator

Wood River Federal, LLC; San Antonio (TX); On-site; USD 110,000 - 160,000; Full time

Job summary

Wood River Federal, LLC seeks a Senior Network and Computer Systems Administrator to lead the architectural design, implementation, and high-level maintenance of enterprise server and network infrastructure. You will ensure security, availability, and performance of critical back-end systems and mentor junior staff.

The role requires DoD 8140 IAT II/III certifications, extensive virtualization and storage experience, and strong scripting skills.

Qualifications

• Minimum 7–10 years of progressive systems and network administration experience.
• Senior/lead administrator experience with architectural design and leading infrastructure projects required.
• DoD 8140 IAT Level II or III certification required (Security+ CE for IAT II; CASP+/CISSP for IAT III preferred).
• Must possess at least one advanced CE certification (CCNA/CCNP/Azure Administrator/Windows Server Hybrid Admin).
• Must be able to obtain and maintain DoD security clearance.

Responsibilities

• Design, lead, and implement major infrastructure projects including virtualization upgrades and SAN migrations.
• Serve as Tier 3 escalation for complex outages and performance issues.
• Develop and maintain network and system architecture documentation and DR plans.
• Lead patch management, backup, and disaster recovery initiatives.
• Oversee security controls to meet DoD and Air Force compliance.

Skills

VMware

SAN/NAS

Network architecture

Routing protocols

Active Directory

PowerShell

Tools

VMware vSphere/vCenter

Windows Server

DNS

Group Policy

Job description

Senior Network and Computer Systems Administrator

1. Labor Category Description
The Senior Network and Computer Systems Administrator is a highly experienced subject matter
expert (SME) and the lead technical authority responsible for the architectural design,
implementation, and high-level maintenance of the enterprise server and network infrastructure.
This role ensures the security, availability, and performance of all critical back-end systems. The
Senior Administrator leads infrastructure projects, serves as the final escalation point for the
most complex technical issues, and provides mentorship and technical guidance to junior and
journeyman administrators. They are responsible for long-range planning, capacity management,
and the continuous improvement of the IT infrastructure in alignment with organizational goals
and security mandates.

2. Typical Task List

Infrastructure Architecture and Engineering:
Design, lead, and implement major infrastructure projects, such as server
virtualization upgrades, Storage Area Network (SAN) migrations, and network
backbone refreshes.
Evaluate new technologies and provide expert recommendations to leadership for
future architectural improvements and technology refresh cycles.
Develop and maintain comprehensive documentation of the network and system
architecture, including high-level diagrams, configuration standards, and disaster
recovery plans.
Perform capacity planning and performance tuning to ensure the infrastructure
can support future growth and performance requirements.
Advanced Systems and Network Administration:
Serve as the final Tier 3 escalation point for complex and persistent system and
network outages and performance degradation issues.
Manage and administer the enterprise virtualization environment (e.g., VMware
vSphere/vCenter), including host configuration, high-availability, and
performance monitoring.
Develop and manage the overall patch management strategy, ensuring all systems
are patched in a timely and secure manner while minimizing operational impact.
Lead the implementation and management of enterprise backup and disaster
recovery solutions, and oversee regular DR testing.
Security and Compliance Leadership:
Lead the technical implementation and validation of security controls to meet
DoD and Air Force compliance requirements (e.g., RMF, STIGs).
Interpret security mandates and develop actionable plans for system hardening
and configuration management.
Oversee the vulnerability management program for the infrastructure team,
analyzing complex vulnerabilities and directing remediation efforts.
Collaborate with cybersecurity teams during audits and security assessments,
providing technical evidence and expertise.
Mentorship and Knowledge Management:
Provide technical leadership, on-the-job training, and mentorship to junior and
journeyman administrators.
Establish and enforce standard operating procedures (SOPs) for system and
network administration tasks.
Act as a technical lead on cross-functional project teams, providing expert
guidance on infrastructure-related matters.

3. Minimum Qualifications / Requirements

Experience:
A minimum of seven (7) to ten (10) years of progressive, hands-on experience in
systems and network administration.
At least three (3) years of this experience must be in a senior or lead administrator
role, with responsibility for architectural design and leading infrastructure projects.
Demonstrated experience managing complex, enterprise-level virtualization
environments is required.
Certifications (Baseline):
Must possess a current certification that meets DoD 8140 requirements for IAT
Level II or IAT Level III. Acceptable certifications include:
Required: CompTIA Security+ CE (for IAT II)
Desired: CASP+ CE or CISSP (for IAT III)

Certifications (Computing Environment):

Must possess at least one advanced, relevant CE certification. Examples include:
Cisco Certified Network Associate (CCNA)
Cisco Certified Network Professional (CCNP)
Microsoft Certified: Azure Administrator Associate (if cloud-focused) or
Windows Server Hybrid Administrator Associate

Security Clearance:

Must be able to obtain and maintain a DoW Security Clearance

Technical Skills:

Expert-level knowledge of virtualization platforms (VMware preferred).
Advanced proficiency with enterprise storage systems (SAN/NAS).
In-depth knowledge of network architecture and protocols, including routing (e.g.,
OSPF, BGP), switching, and firewalls.
Expertise in managing Microsoft Windows Server environments, including Active
Directory, DNS, and Group Policy at an enterprise scale.
Strong scripting skills for automation (e.g., PowerShell).