Senior Network & Systems Engineer

The most security-conscious organizations trust Telos Corporation to protect their vital IT assets. The reputation of our company rests on the quality of our solutions and the integrity of our people. Explore what you can bring to our solutions in the areas of cyber, cloud and enterprise security.

Be a part of the Telos culture and see what sets us apart! Salary: $100,000-120,000 per year, depending on experience and qualifications. Telos offers an excellent compensation package with benefits that include generous paid time off, medical, dental, vision, tuition reimbursement, and 401k. Our employees enjoy more than just a great work environment!

This position will be based at Ashburn/Hybrid.

We are seeking a highly experienced, hands-on Senior Network & Systems Engineer to support mission-critical infrastructure across on-premises data center and AWS GovCloud environments.

This position extends beyond traditional network engineering and requires strong expertise in Cisco networking, Windows Systems Administration, virtualization, cybersecurity, and AWS GovCloud. The successful candidate must be capable of independently troubleshooting across the complete infrastructure stack, identifying root cause, and taking ownership of complex technical issues through resolution.

Responsibilities:

Network & Infrastructure Engineering

• Configure, maintain, secure, and troubleshoot enterprise Cisco network infrastructure, including switches, routers, VLANs, routing, ACLs, VPNs, and wireless technologies.
• Troubleshoot Layer 2 through Layer 7 connectivity, routing, DNS, firewall, performance, and application communication issues.
• Support secure connectivity between on-premises infrastructure, AWS GovCloud, government partners, customers, and external systems.
• Analyze network traffic using packet captures, Wireshark, PowerShell, Netstat, and network monitoring tools.
• Maintain network configurations, diagrams, documentation, and operational procedures for highly available, mission-critical infrastructure.

Windows Systems Administration & Virtualization

• Administer and troubleshoot Microsoft Windows Server environments, including Active Directory, Group Policy, DNS, IIS, certificates/PKI, TLS, Kerberos, authentication, permissions, and Windows services.
• Perform server builds, configuration, patching, upgrades, vulnerability remediation, system hardening, and lifecycle management.
• Administer and support Microsoft Hyper-V clustered and virtualized server infrastructure.
• Use PowerShell for administration, troubleshooting, automation, system analysis, and compliance evidence collection.

AWS GovCloud

• Administer and troubleshoot AWS GovCloud (US) infrastructure, including EC2, VPCs, subnets, route tables, Security Groups, NACLs, VPC endpoints, Route 53, load balancers, S3, RDS, IAM, CloudWatch, CloudTrail, Security Hub, and Systems Manager.
• Support and troubleshoot hybrid connectivity between AWS GovCloud, on-premises infrastructure, and external systems.
• Administer Windows EC2 instances and troubleshoot issues spanning AWS networking, security controls, operating systems, DNS, certificates, and application connectivity.
• Utilize Infrastructure as Code (IaC) to deploy and maintain environments based on technical requirements from development teams, government partners, and customers.

Cybersecurity & Compliance

• Support infrastructure operating under federal cybersecurity and compliance requirements, including NIST SP 800-53, DISA STIGs, continuous monitoring, and Authority to Operate (ATO) processes.
• Perform vulnerability analysis, remediation, validation, security hardening, and configuration management.
• Work with technologies such as Tenable/Nessus, SIEM/logging platforms, endpoint security solutions, firewalls, and network security tools.
• Evaluate vulnerability findings for technical applicability and implement appropriate remediation.
• Support security assessments, audits, incident response, and compliance activities, including development of technical documentation and supporting evidence.