Network Engineer III - Crystal City, VA

Epsilon - Arlington, VA

Full-time - Mid Level

Arlington, VA

Professional, Scientific, and Technical Services

About the position

The Network Engineer III position at Epsilon involves designing, implementing, and optimizing network infrastructure for large-scale data centers. This role requires collaboration with cross-functional teams to ensure secure and efficient network solutions while adhering to federal security compliance. The engineer will also mentor junior engineers and maintain communication with project stakeholders.

Responsibilities

• Design, implement, and maintain data center network infrastructure, ensuring high availability and security.
• Assist in the deployment of new data center build-outs, collaborating with engineering teams on planning and execution.
• Troubleshoot, monitor, and optimize network performance, particularly in CISCO environments.
• Ensure network operations adhere to federal security standards and regulatory compliance.
• Provide technical support and guidance to junior engineers, assisting with complex troubleshooting and design issues.
• Collaborate with project management teams to meet deadlines and project objectives.
• Maintain up-to-date network documentation, including designs, configurations, and procedures.
• Participate in the evaluation and selection of networking hardware, software, and tools.
• Communicate effectively with stakeholders and technical teams to support project goals.
• Provide technical leadership and mentorship to other team members and ensure best practices are followed.
• Travel both domestically and internationally as needed to provide support for project implementations.

Requirements

• 5+ years of experience in network engineering, with hands-on experience in configuring and managing CISCO environments, including routers, switches (Nexus, Catalyst), and firewalls (Cisco ASA, Firepower).
• Expertise in routing and switching protocols, including OSPF, BGP, EIGRP, and HSRP, as well as advanced switching technologies such as VLANs, VTP, STP, and EtherChannel.
• Proven experience with network security technologies, including IPSec VPNs, SSL VPNs, NAT, access control lists (ACLs), and integration with firewalls and intrusion prevention systems (IPS).
• Advanced troubleshooting and problem-solving skills using tools like Wireshark, Cisco DNA Assurance, and SolarWinds for diagnosing complex issues in multi-layered network environments.
• Extensive experience with data center networking, including new build-outs, migrations, and upgrades, with a focus on redundancy, high availability, and disaster recovery solutions.
• Proficiency with network monitoring and optimization tools, such as Cisco Prime, SolarWinds, NetFlow, and SNMP-based systems for performance tuning and proactive network management.
• In-depth knowledge of enterprise network design, including architecture, segmentation, load balancing, and the integration of multi-vendor solutions in CISCO-dominant environments.
• Experience with network automation and scripting tools, such as Python, Ansible, or Cisco DNA Center, to streamline configurations, updates, and network operations.
• Strong communication and collaboration skills, with the ability to work effectively across teams and manage stakeholder expectations in complex projects.

Benefits

• $3,000 annually in Professional Development funds
• Competitive pay
• Comprehensive benefits through one of the largest national carriers
• Paid Time Off (PTO) that increases with tenure and has a generous rollover
• 11 company paid Holidays
• 401(k) with immediate contribution