Network & Security Infrastructure Engineer

RadNet, Inc.; Washington (District of Columbia); Hybrid; USD 120,000 - 180,000; Full time

Job summary

Everforth ECS seeks a Network & Security Infrastructure Engineer to lead VMware ESXi re-architecture, VLAN segmentation, and firewall administration in Washington, DC with remote options. You will support Check Point and Palo Alto platforms while coordinating with security operations and enterprise networking teams.

The role emphasizes architecture-level thinking, documentation, and cross-team collaboration across cybersecurity, systems administration, and technology support partners.

Qualifications

• Hands-on with VMware ESXi re-architecture in an enterprise setting.
• Experience implementing VLAN segmentation for firewall enforcement and traffic isolation.
• Proficient in configuring virtual switches and distributed switches for security segmentation.
• Familiarity with NSX or similar SDN platforms for micro-segmentation and east-west traffic control.
• Ability to document virtual network architecture clearly, including decisions and configurations.
• Hands-on firewall experience with Check Point and Palo Alto platforms.
• Experience with firewall policy administration, updates, and validation.
• Strong knowledge of firewall rules and security operations in a large enterprise.
• Willingness to work outside normal hours for outages or maintenance.
• Experience with Cisco networking and Aruba wireless security in enterprise environments.
• Knowledge of TCP/IP, BGP, OSPF, VLANs, VPNs, and network monitoring from a security perspective.

Responsibilities

• Lead a major re-architecture of the VMware ESXi environment to support firewall and VLAN segmentation.
• Provide dedicated firewall support to Architecture & Engineering and administer both internal and cloud-facing firewalls.
• Support security operations by monitoring and securing Cisco-based network infrastructure and Aruba wireless.
• Document architecture decisions, configurations, and future-state plans clearly.
• Collaborate across cybersecurity, systems administration, and technology support teams.
• Implement and test firewall architectures, upgrades, and feature rollouts.
• Maintain up-to-date documentation and comply with firewall policies.

Skills

VMware ESXi

VLAN segmentation

Firewall administration

NSX / SDN

Virtual networking documentation

Cisco networking

Aruba wireless security

Threat detection & security operations

Security architecture

Incident response readiness

Networking troubleshooting

Cloud security (AWS/Azure)

Education

Bachelor's degree in Cybersecurity/CS/IT/Networking or related

Tools

Check Point

Palo Alto Networks

NSX

VMware vSphere/ESXi

Cisco IOS/ASA/Firepower

Aruba networks

FireMon (or similar)

Job description

Network & Security Infrastructure Engineer

#4741

WASHINGTON, District Of Columbia, United States

Job Description

Everforth ECS is seeking an Network & Security Infrastructure Engineer to work in our Washington, DC office / remote. The role is contingent upon additional funding.

We are seeking an experienced and technically versatile Network & Security Infrastructure Engineer to take on a high-impact, dual-function role within a large and complex enterprise environment. This position sits at the crossroads of network infrastructure, virtual environment engineering, and security operations, and it requires genuine depth across all three, not surface-level familiarity.

The near-term priority for this role is significant: you will lead a major re-architecture of the organization's VMware ESXi virtual environment to support comprehensive firewall and VLAN implementations that deliver proper network segmentation across the enterprise. This is a foundational infrastructure initiative with direct security implications, and it will require someone who can think and execute at the architectural level within a virtualized environment.

Beyond that primary objective, this role carries ongoing responsibility across two organizational teams. You will provide dedicated firewall support to the Architecture and Engineering division, administering the enterprise's internal and cloud-facing firewall environments. On the networking side, you will support the security operations division, monitoring and maintaining a Cisco-based network infrastructure and an Aruba wireless environment from a security-first perspective.

This role is built for someone who can operate with equal confidence in a virtual environment console, a firewall policy manager, and a network operations context.

• Hands-on experience designing and re-architecting VMware ESXi environments in an enterprise setting
• Ability to plan and implement VLAN segmentation strategies within virtualized infrastructure to support firewall enforcement and proper traffic isolation
• Experience configuring virtual switches, distributed switches, and virtual port groups in support of security segmentation objectives
• Familiarity with NSX or equivalent software-defined networking (SDN) platforms as they relate to micro-segmentation and east-west traffic control
• Ability to document virtual network architecture clearly and thoroughly, including design decisions, configurations, and future-state plans

Firewall Administration

• Hands-on experience configuring and administering enterprise-class firewall technologies, with specific experience on Check Point and Palo Alto platforms
• Ability to implement new firewall architectures, upgrades, and feature rollouts as directed
• Experience administering firewall policy including updates, upgrades, policy administration, and validation
• Proficiency managing and tuning software blades and associated security features such as IPS, URL filtering, Application Control, antivirus, and advanced malware detection
• Ability to review and implement changes consistent with existing firewall policies while maintaining thorough, up-to-date documentation
• Strong knowledge of firewall rules, security policies, and security operations within a large enterprise environment
• Willingness to work outside of normal business hours when required to support outage resolution or planned maintenance

Network Infrastructure & Security

• Strong hands-on experience with Cisco network infrastructure including routing, switching, and network security configurations in an enterprise setting
• Experience supporting and securing Aruba wireless access point environments
• Solid understanding of core networking protocols including TCP/IP, BGP, OSPF, VLANs, and VPNs
• Ability to monitor and analyze network architecture, communication flows, policies, and protocols from a cybersecurity perspective
• Experience identifying and isolating network-based security issues quickly during incidents and outages
• Familiarity with network access control concepts and how they integrate with broader security operations
• Ability to collaborate across teams including cybersecurity, systems administration, and technology support partners
• Experience supporting security continuous monitoring efforts such as risk assessments, vulnerability identification, and patch coordination
• Ability to create and maintain clear, accurate documentation for virtual, network, and firewall configurations, procedures, and troubleshooting steps
• Comfortable communicating technical findings and infrastructure risk clearly to both technical peers and senior leadership

A minimum of 5+ years of experience in network security engineering or a closely related infrastructure discipline is required, with direct hands-on experience on both Check Point and Palo Alto platforms strongly preferred. Candidates who bring demonstrated experience with VMware ESXi re-architecture and VLAN segmentation design — in addition to enterprise networking and firewall administration — will be given strong preference over candidates with depth in only one or two of these areas.

Desired Skills

• Experience with network security policy management platforms such as FireMon or equivalent
• Familiarity with IDS/IPS platforms and integration with firewall and SIEM environments
• Scripting or automation experience in Python, PowerShell, or Bash to support network and firewall operations
• Experience with cloud networking security in AWS or Azure, particularly with Palo Alto cloud-native firewall solutions
• Familiarity with Zero Trust network access (ZTNA) and micro-segmentation concepts
• Experience with VPN technologies and secure remote access architectures
• Bachelor's degree in Cybersecurity, Computer Science, Information Technology, Networking, or a related field preferred
• Relevant certifications such as CCNP Security, VMware Certified Professional (VCP), Check Point Certified Security Expert (CCSE), Palo Alto Networks Certified Network Security Engineer (PCNSE), or equivalent are strongly preferred

ECS Federal LLC is an equal opportunity employer and does not discriminate or allow discrimination on the basis any characteristic protected by law. All qualified applicants will receive consideration for employment without regard to disability, status as a protected veteran or any other status protected by applicable federal, state, or local jurisdiction law.

Everforth ECS is the federal segment ofEverforth , a $4B global organization with over 10,000 employees. Our nearly 3,500 professionals deliver advanced technology solutions in data and AI, cybersecurity, and enterprise transformation, serving defense, intelligence, and federal civilian agencies.

Our work powers mission-critical outcomes, strengthens technology partnerships, and creates meaningful opportunities for our people. We are defined by a commitment to excellence in delivery, a culture of innovation, and an environment where talent can thrive and grow.

We value:

• Attracting and developing top talent and high-performing teams
• Fostering a culture that is engaging, accountable, and mission-driven

Meet the challenge. Make a difference with Everforth ECS!

undefined

ECS Federal LLC is an equal opportunity employer and does not discriminate or allow discrimination on the basis any characteristic protected by law. All qualified applicants will receive consideration for employment without regard to disability, status as a protected veteran or any other status protected by applicable federal, state, or local jurisdiction law.

Everforth ECS is the federal segment of Everforth , a $4B global organization with over 10,000 employees. Our nearly 3,500 professionals deliver advanced technology solutions in data and AI, cybersecurity, and enterprise transformation, serving defense, intelligence, and federal civilian agencies.

Our work powers mission-critical outcomes, strengthens technology partnerships, and creates meaningful opportunities for our people. We are defined by a commitment to excellence in delivery, a culture of innovation, and an environment where talent can thrive and grow.

Meet the challenge. Make a difference with Everforth ECS!