5,288 Results for

Network Security Jobs in Annandale, VA

Jobs

Senior Security Engineer Leidos

Bethesda, Maryland

September 14, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Coordinate vulnerability remediation across Windows, Linux, network, desktop support and other engineering teams and provide hands-on support for complex or high-priority issues as needed.

30+ days ago

Endpoint Security Engineer (EDR/XDR) (Hybrid) A.C. Coy

Falls Church, Virginia

Fleet-Wide Behavioral Defense & Control Engineering: Engineer, deploy, and maintain Next-Gen Antivirus (NGAV) and Endpoint Detection & Response (EDR/XDR) agents (e.g., CrowdStrike Falcon, Microsoft Defender for Endpoint, SentinelOne) across hundreds of thousands of heterogeneous endpoints. Balance proactive protection with business continuity - partnering directly with end-users and application owners to tune policies and eliminate operational friction, while providing tier-3/tier-4 technical escalations to Security Operations Center (SOC) analysts and IT Operations staff during active investigations.

30+ days ago

Information System Security Engineer LufCo

Annapolis Junction, MD

S ecurity engineering representative on engineering teams for the design, development, implementation, and integration of secure networking, computing, and enclave environments. Hands on application and knowledge of IA policy, procedure, and workforce structure to design, develop, and implement secure networking, computing, and enclave environments.

30+ days ago

Information Security Engineer TechDigital

DC, DC

Participate in audits, as needed, producing necessary documentation, reports, and explanations, and Implement corrective and preventive action plans approved by unit managers Support for security tools such as Trend Micro Deep Security Host Based firewall (or similar host-based firewall tool) and CyberArk (or similar tool). Information Security Engineering Manage AWS Security tools (such as GuardDuty, Trusted Advisor, Secret Manager, Parameter Store, Inspector) Create AWS CloudFormation and manage AWS Security Groups.

30+ days ago

Security Engineer, Kubernetes SpaceXSI

Washington, DC

$100,000–$258,000 / year

Our teams are building the full Super Intelligence stack: from our Colossus supercomputers, to Grok models, to our suite of applications, including Grok Bot, Grok Build, Grok Imagine, Grok Voice, and X. Deep knowledge of pod and workload security: privileged containers, capabilities, host namespaces, host path mounts, service accounts, RBAC, admission control, and network isolation.

7 days ago

Network Engineer 5 Capital One

McLean, VA

Full time

Candidates hired to work in other locations will be subject to the pay range associated with that location, and the actual annualized salary amount offered to any candidate at the time of hire will be reflected solely in the candidate's offer letter. Basic Qualifications: Bachelor's Degree in Computer Science, Engineering, or at least 8 years of experience in network engineering, including management of network systems.

19 days ago

Open Talent Network: Staff DevOps and Systems Integration Engineer Ad Hoc

Mc Lean, VA

Remote

$160,000–$180,000 / year

We partner with these agencies to build new capabilities, deliver products, establish data as a strategic asset for informed decision-making, modernize legacy systems, and build the digital service infrastructure necessary to scale their mission impact. Go/Java/Node.js (API development), Python/Ruby (scripting), PostgreSQL/NoSQL databases, experience with API Gateways (e.g., Kong, Apigee), Jira/Confluence (expert-level scripting/configuration for JIRA migration and maintenance).

30+ days ago

Sr. Network Security Engineer III 6852 Metrostar Systems

Washington, DC

$207,000–$320,000 / year

Demonstrated subject matter expertise designing, implementing, and managing next-generation firewalls, VPN solutions, intrusion prevention systems, and network access control platforms. Our team is responsible for designing, operating, and hardening complex security environments, and you'll play a critical role in strengthening, scaling, and protecting these environments while enabling secure mission delivery across the organization.

28 days ago

Network Engineer 1 | TS/SCI w/ poly security clearance Power3 Solutions

Annapolis Junction, Maryland

$110,000–$120,000 / year

Cisco IOS, CatOS, NxOS, filter and access control, Ciscoworks, TACACS+, ASA, FWSM, HP Openview, Cisco routers, Cisco Switches, F5/Cisco load balancers, Infiniband, Juniper, FiberChannel (FC) SAN, and VPN (IPSEC) . Must have datacenter network design and architecture experience to include installation and configuration of Cisco routers, switches, firewalls, and IPSEC virtual private networks.

30+ days ago

Lead Network Systems Researcher STR

Arlington, Virginia

$180,000–$230,000 / year

Engineering and communication practices : Working knowledge of software design patterns and engineering best practices, including integration, testing, version control, and collaboration tools such as Git, JIRA, and Confluence; strong written and verbal communication skills. Collaborative software development : Experience developing software in large, multi-party code bases using collaborative engineering practices and modern developer tools, including LLM-enabled coding tools such as Cursor or Codex.

6 days ago

Sr. Network Engineer, AI Infrastructure (Starshield) Space Exploration Technologies

Washington, DC

$165,000–$265,000 / year

BASIC QUALIFICATIONS: Bachelor's degree in a technical or engineering discipline AND 5+ years of professional networking experience deploying enterprise network solutions or cloud and web-scale networks; OR 7+ years of professional networking experience deploying enterprise network solutions or cloud and web-scale networks in lieu of a degree. The Starshield team is building highly reliable in-space mesh networks, designing secure systems to guarantee access to space, designing next-gen communication and sensing software, and more.

30+ days ago

Senior Network Engineer GD Information Technology

Rockville, Maryland

To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. 8+ years of network engineering experience, including: TCP/IP, DNS, routing/switching, IPsec VPN, firewalls, and end-to-end connectivity troubleshooting, including PCAP analysis with Wireshark.

7 days ago

Security & Vulnerability Management Engineer Peraton Inc

Washington, DC

$135,000–$216,000 / year

Serving as the single dedicated technical engineering resource, the selected candidate will independently execute ten security improvement projects spanning vulnerability management, endpoint protection, patch management, firewall and network security, identity and access management, and security governance. Responsibilities extend beyond identifying vulnerabilities and recommending corrective actions to directly implement approved security configuration changes, executing technical remediation, optimizing security platforms, and delivering measurable improvements to the organization''s security posture.

4 days ago

Network Engineer (Cisco, Linux, VPNs & Scripting) Summit Technology Management LLC

Chantilly, VA

You will work closely with our engineering team to maintain high system availability, implement Linux-based firewall rules, build and maintain secure VPN tunnels, and automate routine operational tasks using languages like Python and Bash. Network Automation & Scripting: Write and maintain basic programs/scripts using Python, Bash , or similar languages to automate system backups, log parsing, and routine network monitoring tasks.

12 days ago

Network Engineer (Sr.) Quadrant, Inc.

Bethesda, MD

Quick Apply

The role requires expertise in enterprise networking, micro-segmentation, identity-aware access, and security architecture, with collaboration across cybersecurity, endpoint engineering, and Chrome Enterprise Premium (CEP) teams to enable secure, context-aware access. Preferred Professional certification in Zero Trust Architecture i.e., Certificate of Competence in Zero Trust (CCZT) or documented leadership on at least two multi-site Zero Trust assessment/implementation projects of comparable scope.

2 days ago

Security Engineer Quadrant, Inc.

Washington, DC

$160,000–$190,000 / year
Quick Apply

5 years of experience supporting AWS network and cloud security, including VPCs, security groups, network ACLs, VPC Flow Logs, CloudTrail, hybrid routing, and secure on-premises-to-cloud integration. 5 years of experience integrating and validating security logs in Microsoft Sentinel or a comparable SIEM, including threat analysis, log correlation, containment, root cause analysis, and remediation coordination.

13 days ago

Network Cabling Technician Peraton Inc

Washington, DC

$80,000–$128,000 / year

This role works closely with customers, end users, project managers, engineers, network personnel, security personnel, and other technical teams to identify infrastructure requirements, resolve connectivity issues, support network deployments, and complete cabling projects safely, efficiently, and on schedule. The Network Cabling Technician is responsible for the installation, maintenance, troubleshooting, repair, testing, and upgrade of structured cabling and network infrastructure supporting facilities and other secure operational environments.

26 days ago

Network Architect ValidaTek Inc

Fort Belvoir, VA

In this role, you will author and tune Palo Alto NGFW security policies and IDS/IPS threat prevention signatures, implement enterprise network access control and 802.1X policies via Cisco ISE and Aruba ClearPass, integrate enterprise PKI/OCSP services and hardened NTP, and generate key engineering artifacts required for NSA CSfC PMO registration and compliance auditing. Summary: ValidaTek is seeking an experienced Network Engineer (SME) to join our Integrated Information Technology Support Services (I3TS) team, who will support an extensive digital modernization program critical to Defense Threat Reduction Agency (DTRA) in Fort Belvoir, VA.

30+ days ago

Senior Network Engineer 22nd Century Technologies, Inc.

Rockville, MD

Quick Apply

Job Summary Serve as a hands-on senior engineer on HRSA's enterprise network team, working with the technical lead, project managers and HRSA stakeholders. Design, plan, implement and maintain enterprise LAN/WAN, Zscaler and network security infrastructure, including routers, switches, firewalls and remote access systems.

9 days ago

Lead Network Engineer 22nd Century Technologies, Inc.

Rockville, MD

Quick Apply

Job Summary Serve as the hands-on technical lead for HRSA's enterprise network, leading a team of three network engineers and working directly with the HRSA client counterpart. Act as the top escalation point for complex network, firewall, VPN and authentication problems, using Wireshark packet captures, SolarWinds, Riverbed, Grafana and Cribl to find root cause.

9 days ago

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Network Security Jobs in Annandale, VA

Senior Security Engineer Leidos

Endpoint Security Engineer (EDR/XDR) (Hybrid) A.C. Coy

Information System Security Engineer LufCo

Information Security Engineer TechDigital

Security Engineer, Kubernetes SpaceXSI

Network Engineer 5 Capital One

Open Talent Network: Staff DevOps and Systems Integration Engineer Ad Hoc

Sr. Network Security Engineer III 6852 Metrostar Systems

Network Engineer 1 | TS/SCI w/ poly security clearance Power3 Solutions

Lead Network Systems Researcher STR

Sr. Network Engineer, AI Infrastructure (Starshield) Space Exploration Technologies

Senior Network Engineer GD Information Technology

Security & Vulnerability Management Engineer Peraton Inc

Network Engineer (Cisco, Linux, VPNs & Scripting) Summit Technology Management LLC

Network Engineer (Sr.) Quadrant, Inc.

Security Engineer Quadrant, Inc.

Network Cabling Technician Peraton Inc

Network Architect ValidaTek Inc

Senior Network Engineer 22nd Century Technologies, Inc.

Lead Network Engineer 22nd Century Technologies, Inc.

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