Network Engineer

Avint LLC is seeking a dedicated and technically skilled Mid-Level Network Engineer for an on-site position in San Diego, CA. In this critical role, you will support and maintain enterprise network infrastructure in a mission-driven environment, ensuring secure, reliable, and high-performance connectivity across systems and sites. You’ll be responsible for configuring and monitoring routers, switches, firewalls, and load balancers, performing network troubleshooting, and supporting both LAN and WAN environments.

Experience with network technologies such as Cisco, Juniper, or Palo Alto; protocols including TCP/IP, BGP, OSPF, and VPNs; and tools for monitoring and diagnostics is essential. Familiarity with network security best practices—including DISA STIGs, vulnerability mitigation, and support for accreditation and compliance processes—is highly desirable. This position involves close collaboration with cybersecurity, systems, and operations teams to ensure robust and compliant network operations in support of organizational goals.

Location: 100% on-site in San Diego, CA

Responsibilities:

• Support network infrastructure integration with Nutanix Hyperconverged environments, ensuring reliable connectivity for Regional FRCS Monitoring systems and virtualized platforms.
• Provide network configuration and support for the deployment of the Cyber Monitoring Services OT Monitoring Platform, including secure communications between Central Store, Site Store, and distributed Sensors.
• Collaborate with database and systems teams to ensure secure, efficient network access to Microsoft SQL Server resources in support of operational requirements.
• Coordinate network-related tasks within the Marine Corps Certification and Accreditation Support Tool (MCCAST V2) to support system authorization and security posture tracking.
• Design, maintain, and troubleshoot network infrastructure in a DoD environment, including secure LAN/WAN connectivity and mission-critical data transmission.
• Understand and support network requirements related to high voltage systems, water/wastewater facilities, and mechanical infrastructure to ensure operational continuity.
• Apply knowledge of TCP/IP, VLANs, ACLs, and routing protocols to secure and optimize Unix and Windows system communications across enterprise and field environments.
• Assist in the implementation and network integration of Host-Based Security System (HBSS) for monitoring and enforcing endpoint security policies.
• Support network connectivity and security for Automated Metering Infrastructure (AMI) and energy management systems.
• Ensure network design and data flows comply with USMC DEVSECOPS policy, particularly as it applies to ICS/OT environments.
• Collaborate with ICS teams to ensure proper network integration and secure communications for platforms such as Metasys, Niagara AX, Alerton, Honeywell, and Rockwell.
• Configure and troubleshoot communication protocols including BACnet/MSTP, BACnet/IP, N2, LON, and SCADA systems used in high voltage and water/wastewater operations.
• Coordinate with system teams to plan and validate secure network paths for software updates, patch deployments, and version control in ICS/OT environments.
• Support network requirements and data security measures in alignment with the USMC Assessment and Authorization (A&A) process, including RMF and CNSSI 1253.
• Collaborate in tracking and resolving network-related findings in POA&Ms to maintain security compliance.
• Apply DISA STIGs to network devices, ensuring secure baseline configurations and audit readiness.
• Interpret and implement NIST 800-53 and DoDI 8510.01 standards to guide secure network architecture and operations.
• Conduct network vulnerability and risk assessments, implementing mitigation strategies in coordination with cybersecurity teams.
• Support integration and monitoring of Dragos platform data over network infrastructure to detect and respond to OT cyber threats.

Experience:
Minimum 3 years of relevant IT/system administration experience supporting virtualized environments, networks, and OT systems.

Education:
Bachelor’s degree in Information Technology, Computer Science, Cybersecurity, or a related field.

Security Clearance:
Active Secret clearance required.

Certifications:
One or more of the following certifications (or equivalent) are highly desired:

• Cyber Monitoring Services Platform Certified User Certification
• ITIL v4 Foundations
• ICS-VLP Certificate (Courses 210W-01 through 210W-10)
• Risk Management Framework (RMF) Training – USMC specific
• Cisco Certified Entry Networking Technician (CCENT) or Cisco Certified Network Associate (CCNA)
• CompTIA Security+ (Sec+)
• Certified Information Systems Security Professional (CISSP)
• Microsoft Certifications (Server, Azure, or related)

Joining Avint is a win-win proposition! You will feel the personal touch of a small business and receive BIG business benefits. From competitive salaries, full health, and generous PTO and Federal Holidays. Additionally, we encourage every Avint employee to further their professional development. To assist you in achieving your goals, we offer reimbursement for courses, exams, and tuition. Interested in a class, conference, program, or degree? Avint will invest in YOU and your professional development!

Avint is committed to hiring and retaining a diverse workforce. We are proud to be an Equal Opportunity and Affirmative Action Employer, making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class.

The salary range for this position is: $XXX - $XXX