Senior Network & Systems Engineer — Client-Facing MSP

Allied IT Systems; Port Arthur (TX); On-site; USD 90,000 - 130,000; Full time

Job summary

Allied IT Systems is seeking an experienced Senior Network & Systems Analyst to support client technology environments throughout Southeast Texas. This role will provide advanced support, administration, troubleshooting, implementation, and guidance across networking, servers, cloud platforms, cybersecurity, and managed IT services.

The successful candidate will independently manage complex issues, communicate with clients, mentor junior personnel, and help improve Allieds technical

Qualifications

• Five or more years of progressively responsible experience in network or systems administration.
• Experience configuring and troubleshooting switches, routers, firewalls, VLANs, VPNs.
• Strong working knowledge of TCP/IP, DNS, DHCP, routing, subnetting, and secure remote access.
• Experience administering Windows Server, Active Directory, Group Policy, Microsoft 365, Entra ID, and endpoints.
• Experience with virtualization, backup systems, endpoint protection, patching, monitoring tools, and cybersecurity controls.
• Ability to independently diagnose complex technical problems and develop practical, supportable solutions.
• Strong technical documentation, organization, and project coordination skills.
• Excellent written and verbal communication skills, including the ability to explain technical matters to nontechnical clients.

Responsibilities

• Design, configure, administer, maintain, and troubleshoot client network and systems infrastructure.
• Support switches, routers, firewalls, wireless networks, VPNs, internet connectivity, and related network services.
• Administer Microsoft Windows Server, Active Directory, Group Policy, Microsoft 365, Entra ID, and related cloud services.
• Diagnose and resolve complex network, server, application, endpoint, security, and performance issues.
• Implement and maintain cybersecurity controls, including endpoint protection, MFA, email security, monitoring, patching, and hardening.
• Review security alerts and incidents, determine response actions, and coordinate escalation.
• Plan and execute infrastructure upgrades, equipment replacements, migrations, deployments, and remediation projects.
• Develop and maintain network diagrams, system documentation, configuration records, technical standards, and client procedures.
• Serve as a senior technical resource for clients, junior analysts, vendors, subcontractors, and project teams.
• Review work of junior personnel and provide coaching, training, and guidance.
• Assist with technical assessments, project scoping, equipment recommendations, and cost estimates.
• Identify recurring problems and opportunities to improve reliability, security, and service quality.
• Participate in after-hours maintenance, escalation support, and on-call rotations.
• Support public-sector, maritime, industrial, and commercial client environments.
• Perform other technical and leadership-related duties as assigned.

Skills

Network administration

Systems administration

Cybersecurity operations

Troubleshooting

Client communication

Mentoring junior staff

Project coordination

Technical documentation

Leadership

Education

Associate or bachelor\u2019s degree in IT, cybersecurity, computer science, networking, information systems, or related field

Tools

Cisco

Microsoft 365

Entra ID

Fortinet

VMware

SIEM

Vulnerability management tools

Job description

Allied IT Systems is seeking an experienced Senior Network & Systems Analyst to support client technology environments throughout Southeast Texas. This role will provide advanced support, administration, troubleshooting, implementation, and guidance across networking, servers, cloud platforms, cybersecurity, and managed IT services.

The successful candidate will independently manage complex issues, communicate with clients, mentor junior personnel, and help improve Allieds technical