Senior Network & Systems Engineer

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.

Job Requirements

Qualifications

Required Qualifications

• Bachelor's (or equivalent) with 7+ years of progressively responsible experience in network engineering, systems administration, infrastructure engineering, or a comparable technical role.
• Advanced hands-on experience with Cisco enterprise networking and strong knowledge of TCP/IP, subnetting, VLANs, routing, switching, ACLs, NAT, VPNs, DNS, DHCP, wireless networking, and network troubleshooting.
• Strong hands-on Windows Server Systems Administration experience, including Active Directory, Group Policy, DNS, Kerberos, certificates/PKI, TLS, and Windows security.
• Experience administering Microsoft Hyper-V clustered environments or comparable enterprise virtualization technologies.
• Strong PowerShell administration, automation, and troubleshooting skills.
• Hands-on AWS experience, preferably AWS GovCloud, with knowledge of VPC networking, cloud security, and hybrid cloud connectivity.
• Experience with vulnerability remediation, patching, system hardening, and infrastructure lifecycle management.
• Demonstrated ability to independently troubleshoot complex issues spanning networks, servers, cloud infrastructure, security controls, and applications.
• Ability to collaborate directly with government agencies, customers, development teams, vendors, and external partners to gather technical requirements and resolve complex infrastructure issues.
• Strong technical documentation and verbal/written communication skills.
• Ability to lift, install, and manipulate physical IT and network equipment weighing up to 50 pounds.
• Valid driver's license and reliable transportation for required local travel.

Preferred Qualifications

• Experience supporting federal government, regulated, or mission-critical production environments.
• Experience with NIST SP 800-53, DISA STIGs, vulnerability management, continuous monitoring, and ATO processes.
• Experience with Tenable/Nessus, SIEM/logging platforms, endpoint security solutions, and enterprise firewall technologies.
• Familiarity with Cisco and Dell hardware procurement, licensing, maintenance, and support processes.
• AWS, Cisco, Microsoft, or cybersecurity certifications preferred; equivalent demonstrated hands-on experience will be considered.

Security Requirements

• Must meet applicable U.S. Government personnel security and system-access requirements.
• Must be able to successfully obtain and maintain a Level 2 Public Trust background investigation/suitability determination as required for access to federal government systems and information.
• Continued assignment may be contingent upon maintaining the required federal suitability determination and system access.
• The successful candidate must meet eligibility requirements to access sensitive information, which requires US citizenship.

Telos maintains a drug-free workplace and will conduct drug testing on all applicants who have accepted an offer of employment.

Telos Corporation participates in the E-Verify program. Therefore, any employment with Telos will also be contingent upon confirmation from the Social Security Administration ("SSA") and/or the Department of Homeland Security ("DHS") of your authorization to work in the United States. Telos offers excellent compensation packages including salary commensurate with experience and benefits to meet your needs for today and the future.

Telos Corporation and its subsidiaries are committed to equal opportunity for all, without regard to race, religion, color, national origin, citizenship, sex, sexual orientation, gender identity, age, veteran status, disability, genetic information, or any other protected characteristic. Telos Corporation will make reasonable accommodations for known physical or mental limitations of otherwise qualified employees and applicants with disabilities unless the accommodation would impose an undue hardship on the operation of our business. If you are interested in applying for an employment opportunity and feel you need a reasonable accommodation pursuant to the ADA, please contact us at View phone number on click.appcast.io. If you require relay service assistance, please click on the following link to review information on your state's relay service:

Telos Corporation is an EEO/AA employer.

Job Type Full-Time Location Ashburn, VA 20147 US (Primary)