Sr. Network Infrastructure Engineer

Job DescriptionJob Description

Position Title: Sr. Network Infrastructure Engineer

Location: Washington, DC

Assignment Type: 6 months contract to hire

Pay Rate: $70.00 - $75.00 / Hourly

Work Schedule: Hybrid - 3 days onsite in D.C.

Benefits: This position may be eligible for medical, dental, vision, and 401(k).

Addison Group is supporting a scientific organization in the DC region seeking a highly skilled Senior Network Infrastructure Engineer to manage and optimize their on-premises and cloud network environments. As a member of the Network Team, this role is responsible for maintaining and enhancing the network infrastructure both within physical data centers and across cloud platforms.

Reporting to the Manager of Networking, this role involves implementing network solutions and supporting network-related technology. The incumbent will maintain network hardware (routers, switches, firewalls, NAC, VPN, and load balancers), network monitoring tools, as well as network-related services (DNS and DHCP) and Cloud services. This is a senior-level network engineer role with cloud experience required.

Position Responsibilities:

• Perform ongoing network maintenance, diagnostics, and design for 500+ nodes across multiple locations
• Administer switches, routers, firewalls, wireless access controllers, load balancers and DNS/DHCP
• Monitor network performance and troubleshoot network-related issues
• Manage and optimize cloud network architectures (e.g., AWS, Google Cloud) to support business applications and services
• Configure and maintain Virtual Private Clouds (VPCs), VPNs, Direct Connect, Transit Gateways and hybrid cloud connectivity
• Work with support staff to provide prompt resolution of staff network problems and requests
• Collaborate with Workplace, Windows, Linux, Storage, Database, and Cloud teams
• Implement network security best practices, including firewalls, NAC, and segmentation strategies across on-premises and cloud environments
• Work with ISPs to ensure reliable Internet connectivity and performance
• Provide services outside of core working hours as required
• Position requires being on-site several days a week with minimal travel

Experience:

• Minimum of five years of hands-on experience in:
  • Cisco switching, routing (OSPF, BGP), firewall (access-lists, VPN tunnels, remote access), and wireless access
  • F5 Load balancing, Cisco ISE, WAF and DNS/DHCP experience are desirable
  • Proficiency in network monitoring and management tools (e.g., Site24x7, SevOne or equivalent) and cloud- monitoring solutions
• Experience with AWS Cloud including:
  • VPC, EC2, ALB/NLB, Transit Gateway, Routing, Security Groups/NACLs, Network Firewall, VPN, Direct Connect, CloudFormation, and IAM roles

Skills:

• Excellent troubleshooting and research skills
• Strong interpersonal skills
• Ability to deploy, configure, and troubleshoot Cisco access-layer switches
• Ability to troubleshoot wired, wireless, VPN, cloud (AWS/GCP), and Internet connectivity
• Solid understanding of L1-L4 network layers
• Ability to practice logical troubleshooting techniques

Addison Group is an Equal Opportunity Employer. Addison Group provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to , color, religion, , , , , , genetic information, marital status, amnesty, or status as a covered veteran in accordance with applicable federal, state and local laws. Addison Group complies with applicable state and local laws governing non-discrimination in employment in every location in which the company has facilities. Reasonable accommodation is available for qualified individuals with disabilities, upon request.

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