Senior-Level Network Engineer

Position Title: Senior-Level Network Engineer

Location: San Diego, CA (100% onsite)

Clearance Requirements: Active Secret Clearance

Position Status: Contract-to-Hire

Pay Rate: $60- $65/hr. (Based on experience)

Position Description: We are seeking a Senior-Level Network Engineer to provide network engineering, integration, testing, troubleshooting, security, and day-to-day operational support for complex physical network environments supporting mission-critical government systems.

This is a 100% onsite position requiring a highly experienced network professional with strong expertise in network architecture, routing and switching, cloud connectivity, network security, performance monitoring, and network infrastructure testing.

The ideal candidate will have hands-on experience with enterprise network technologies including HPE Aruba, Palo Alto, OSPF, BGP, IPsec, Aruba ClearPass, 802.1X, NAC, Zero Trust, AWS, and Azure.

Key Responsibilities

• Provide engineering and operational support for physical network environments, including network hardware/software installation, configuration, firmware upgrades, STIG compliance, maintenance, and performance optimization.
• Monitor, analyze, and troubleshoot network performance at both the physical and IP packet levels using enterprise network monitoring and analysis tools such as Zabbix and inMON Traffic Sentinel.
• Design, configure, maintain, and troubleshoot routers, switches, firewalls, and network distribution infrastructure.
• Configure and troubleshoot OSPF, BGP, IPsec, VLANs, routing tables, IP addressing, and network segmentation.
• Establish and maintain connectivity to AWS and Azure cloud environments, including IP space, VLANs, route tables, VPCs, and virtual gateways.
• Develop and maintain network infrastructure test environments, review test cases, execute testing, analyze results, and document findings.
• Establish and maintain corrective-action processes to identify, track, and resolve network issues in coordination with internal teams and vendors.
• Conduct regression testing to validate network corrections, configuration changes, and infrastructure updates.
• Prototype, install, configure, and maintain network infrastructure supporting routing, distribution, firewall, and boundary-routing functions.
• Work extensively with HPE Aruba networking and Palo Alto firewalls/security technologies.
• Implement and manage Network Access Control (NAC) capabilities, including Aruba ClearPass Policy Manager and 802.1X authentication.
• Support implementation of Zero Trust network architectures, including dynamic segmentation and policy-based network access.
• Participate in an on-call rotation and respond to critical network outages during evenings, weekends, and holidays. Must be able to report onsite within two hours of notification when required.
• Maintain network security and configuration standards in accordance with applicable DoD security requirements and STIG guidelines.

Required Skills/Education

Required Qualifications

• Master's degree in Computer Science, Information Technology, Engineering, or a related technical field.
• 10+ years of relevant network engineering experience, including experience working independently on complex network environments.
• Strong hands-on experience with enterprise networking, routing, switching, network architecture, and troubleshooting.
• Experience configuring and troubleshooting OSPF and BGP.
• Experience with IPsec, VLANs, routing, IP addressing, and network segmentation.
• Experience supporting AWS and/or Azure cloud connectivity and associated networking components.
• Hands-on experience with HPE Aruba networking technologies.
• Experience with Palo Alto firewalls and network security infrastructure.
• Experience with Network Access Control (NAC) and 802.1X authentication.
• Strong understanding of network security, Zero Trust principles, and dynamic segmentation.
• Ability to analyze network performance at the packet and infrastructure levels.
• Strong troubleshooting, analytical, documentation, and communication skills.
• Ability to work 100% onsite in San Diego, CA.
• Ability to participate in after-hours/on-call support as required.

Required Security Clearance

• Active Secret Clearance required.

Required Certifications

Candidates must hold one certification from each category below:

IAT Level II Security Certification:

• CompTIA Security+ CE
• CompTIA CySA+
• GIAC Security Essentials Certification (GSEC)
• Security Certified Network Professional (SCNP)
• Systems Security Certified Practitioner (SSCP)

Networking Certification:

• Cisco Certified Network Associate (CCNA)
• Cisco Certified Network Professional (CCNP)
• Cisco Certified Design Professional (CCDP)

Preferred Qualifications

• Experience with Zabbix and/or inMON Traffic Sentinel.
• Strong experience with Aruba ClearPass Policy Manager.
• Experience implementing NAC, 802.1X, Zero Trust, and dynamic segmentation.
• Additional experience with HPE Aruba switching and wireless technologies.
• Experience supporting DoD/NIWC, federal, military, or other government network environments.
• Experience with STIG compliance and secure network configuration.
• Experience with network performance monitoring, packet analysis, and enterprise network management platforms.

About Seneca Resources: At Seneca Resources, we are more than just a staffing and consulting firm, we are a trusted career partner. With offices across the U.S. and clients ranging from Fortune 500 companies to government organizations, we provide opportunities that help professionals grow their careers while making an impact.

When you work with Seneca, you're choosing a company that invests in your success, celebrates your achievements, and connects you to meaningful work with leading organizations nationwide. We take the time to understand your goals and match you with roles that align with your skills and career path. Our consultants and contractors enjoy competitive pay, comprehensive health, dental, and vision coverage, 401(k) retirement plans, and the support of a dedicated team who will advocate for you every step of the way.

Seneca Resources is proud to be an Equal Opportunity Employer, committed to fostering a diverse and inclusive workplace where all qualified individuals are encouraged to apply.