IT System and Network Administrator

TYR Tactical; Peoria (AZ); On-site; USD 70,000 - 90,000; Full time

Job summary

TYR Tactical in Peoria, AZ seeks an experienced System and Network Administrator to support and maintain a reliable enterprise network across multiple sites.

The role requires hands-on expertise with Cisco routers/switches, VPNs, Windows/Linux servers, and Active Directory in a fast-paced manufacturing environment. Travel to other TYR sites may be required.

Qualifications

• 5+ years experience as a network administrator.
• 3+ years experience as a system administrator.
• Strong understanding of IPsec VPNs and firewall concepts.

Responsibilities

• Support and maintain enterprise LAN/WAN and telephony infrastructure.
• Administer and monitor Cisco routers/switches and LAN connectivity.
• Manage Active Directory, Group Policy, DNS/DHCP, access control.
• Maintain network security with firewall configurations and cybersecurity practices.
• Troubleshoot network and server issues to minimize downtime.

Skills

Network admin

System admin

IPsec VPN

TCP/IP

VLANs

Firewalls

Active Directory

Cisco routers

Windows servers

Linux servers

Cybersecurity

Documentation

Teamwork

Education

Bachelors in CS/IT

DoD DFARS/NIST/CMMC knowledge

Certifications: CCNA/CompTIA

Tools

VMware ESXi

Hyper-V

Office 365

Job description

We are seeking an experienced System and Network Administrator to support and maintain a reliable enterprise network in Peoria, Arizona. This IT position is ideal for someone who is detail-oriented and can manage core infrastructure, strengthen network security, and ensure stable connectivity across business operations. The role requires hands-on expertise with Cisco networking equipment, firewall platforms, Microsoft Windows Servers, and Active Directory in a fast-paced technical setting.

ESSENTIAL DUTIES AND RESPONSIBILITIES:

• Provide training and guidance on infrastructure solutions and related topics to internal IT staff and end users
• Designs, analyzes, maintains, and implements LAN/WAN equipment, network, and telephony infrastructure, including maintenance of security measures and solutions
• Administer and maintain network infrastructure, including Cisco routers, switching environments, and LAN connectivity to support daily operations
• Administer virtualization solutions, such as VMware ESXi and Microsoft Hyper-V
• Support Active Directory, Group Policy, DNS, DHCP, and identity management systems
• Monitor network performance, identify connectivity issues, and resolve disruptions to maintain consistent system availability
• Configure, manage, and optimize firewall technologies to protect systems and enforce network security standards
• Troubleshoot hardware, software, and communication issues across the network and implement timely corrective actions
• Perform network updates, configuration changes, and infrastructure improvements while minimizing operational downtime
• Working knowledge of Windows, Linux Servers, Office 365, Active Directory administration, and access management
• Strong hands-on knowledge of Cisco routers, Cisco networking, and LAN environments
• Familiarity with network documentation, maintenance processes, and operational best practices
• Support Multiple sites network infrastructure
• Provide Level 2 IT support, troubleshooting system and user issues

Qualifications

• POSITION QUALIFICATIONS/ FUNCTIONAL SKILLS/ COMPETENCIES:
• EXPERIENCE/EDUCATION:
• 5 or more years of experience as a network administrator
• Minimum of 3 years operational experience as a system administrator
• Extensive operational experience with IPsec VPN tunnel provisioning across multiple platforms.
• Strong understanding of networking concepts (TCP/IP, VLANs, VPNs, firewalls).
• Demonstrated ability to adapt quickly to changing priorities and procedures in a dynamic manufacturing environment
• Strong understanding of cybersecurity protocols
• Experience with DoD DFARS, NIST, and CMMC cybersecurity practice standards a plus.
• Ability to work in a fast-paced environment and be a team player with a proactive and adaptable approach
• Excellent communication and organizational skills
• Preferred Certifications: Cisco CCNA or Microsoft CompTIA
• Bachelor's degree in Computer Science or IT Certifications
• Must be at least 18 years or older

Required Skills

• Strong understanding of networking concepts (TCP/IP, VLANs, VPNs, firewalls).
• Strong understanding of cybersecurity protocols
• Working knowledge of Windows, Linux Servers, Office 365, Active Directory administration, and access management
• Strong hands-on knowledge of Cisco routers, Cisco networking, and LAN environments
• Familiarity with network documentation, maintenance processes, and operational best practices
• Demonstrated ability to adapt quickly to changing priorities and procedures in a dynamic manufacturing environment
• Ability to work in a fast-paced environment and be a team player with a proactive and adaptable approach
• Excellent communication and organizational skills

Preferred Skills

• Experience with DoD DFARS, NIST, and CMMC cybersecurity practice standards a plus.
• Preferred Certifications: Cisco CCNA or Microsoft CompTIA

JOB FACTORS/WORK ENVIRONMENT:

• This role operates in a professional office environment within a high-activity manufacturing facility.
• It requires a balance between desktop IT operations and active, on-site operational oversight is required.
• Possible Travel to other TYR Sites.
• This job description is not intended to be an exhaustive list of all duties or responsibilities associated with the job.
• Other job-related duties may be assigned.

Equal Opportunity Statement

An Aff… Employer Drug-Free Working Environment