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Network Security Jobs in Springfield, VA

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Senior Security Engineer-Network Security Assessment & Post-Quantum Cryptography (PQC) - Hybrid ATD Technology LLC

Suitland, MD

$180,000–$230,000
Quick Apply

Analyze cryptographic implementations key-exchange, digital-signature, and cipher-suite selections; certificate and PKI dependencies; key management and HSM integration; and FIPS 140-2/140-3 validated modules to identify components that rely on quantum-vulnerable public-key algorithms (RSA, Diffie-Hellman, ECDH, ECDSA). Assess the impact of PQC requirements on network implementations, including larger keys and signatures affecting packet size, fragmentation, MTU, and handshake latency; hardware, ASIC, and crypto-accelerator constraints; hybrid key-establishment options; and certificate-chain and protocol interoperability.

1 day ago

Network Security Engineer Twitter

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. ITAR REQUIREMENTS: To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State.

9 days ago

Cisco Network Security Engineer/ Senior Consultant Deloitte

Washington, DC

$105,400–$207,800 / year

3+ years of experience with Cisco Identity Services Engine (ISE) 802.1X Network Access Control (NAC), guest lifecycle management, profiling policies, TrustSec segmentation, and Cisco Firepower capabilities including intrusion prevention system (IPS), malware protection, Uniform Resource Locator (URL) filtering, Domain Name System (DNS)-based security, Secure Sockets Layer/Transport Layer Security (SSL/TLS) decryption, and cloud firewall deployments in Amazon Web Services (AWS), Microsoft Azure, or Google Cloud Platform (GCP). 5+ years of experience designing, deploying, and managing Cisco Firepower Threat Defense (FTD) and Firepower Management Center (FMC) in enterprise environments, including physical appliances, virtual instances, and cloud-delivered Firewall Management Center (cdFMC).

13 days ago

Network Engineer – VDI Security / Network Infrastructure TalentOps

Chantilly, Virginia

This role supports technical risk assessment and mitigation activities across a broad range of enterprise technologies, including IT systems and networks, mobile and wireless networks, cloud-based computing, network management platforms, communication protocols, scripting and programming products, configuration scripts, and IT hardware and software products. The Network Engineer will manage the security and performance of a virtual desktop infrastructure environment, including networking components, firewall policies, VPNs, network segmentation, and endpoint policy enforcement.

30+ days ago

Sr. Network Engineer (Cisco & Network Security) Themis Insight

Fort Meade, MD

Provides assistance in all aspects of network management from network design through implementation, maintenance, and upgrading of existing networks; Analyzes design, specifications, and related documents; Implements communication system requirements to support the distributed functionality of a software engineering environment; Analyzes network characteristics (e.g. Implement specific network solutions to support server requirements to include load-balancing, VPN's, firewall contexts, Traffic Shapping Voice over IP (VOIP), GRE Tunneling, IP Security (IPSec) IP Encryption and Media over IP (MoIP), and network address translation (NAT) where appropriate.

11 days ago

Network Security Engineer 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. To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State.

Today

Cyber Network Security Architecture - Senior Manager Deloitte

Mclean, VA

$163,400–$322,100 / year

8+ years of experience in the design and architecture of enterprise-level technical stacks, including VPNs, CDN solutions, Load Balancers, Subnetting, Next-Generation firewall design, and highly scalable security solutions like Secure Access Service Edge (SASE) technologies. Our purpose comes through in our work with clients that enables impact and value in their organizations, as well as through our own investments, commitments, and actions across areas that help drive positive outcomes for our communities.

17 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.

19 days ago

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

Annapolis Junction, Maryland

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.

14 days ago

5Yrs Senior Network Security Engineer with cisco exp - Onsite GoIntellects

Washington, District of Columbia

$50–$55 / hour

Job Type: Full-time Experience: Bachelor’s degree in IT or related field or equivalent: 4 years (Preferred). install, maintenan of n/w systems including LANs, WANs: 4 years (Preferred).

17 days ago

Principal Network Security Engineer JCS Solutions LLC

Ft Meade, MD

Full time

Network Security Engineering and Architecture Design, engineer, and implement enterprise network security architectures spanning next-generation firewalls, intrusion detection and prevention systems, web and TLS proxies, VPN and encryption services, network access control, DNS security, and east-west security controls. This role serves as a senior technical leader responsible for advancing network security architecture through strategic engineering efforts that strengthen segmentation, access control, zero-trust initiatives, resiliency, and enterprise-wide security posture.

13 days ago

Security Operations Center (Soc) Network Engineer/Systems Integrator - Secret Clearance - Naples, Italy Deloitte

Rosslyn, VA

$113,000–$188,400 / year

This position will eventually roll into a SOC Analyst position which requires a familiarity with Network monitoring tools, Windows, and Linux operating systems (OS) mechanics including filesystem structures, disk and memory forensics, cyber aware Operational Technology or Control Systems operators, commonly used mechanisms for maintaining security persistence, privilege escalation, and lateral data movement, operating system log analysis, and triaging suspicious file artifacts for unusual behavior. Our Hybrid Cloud Infrastructure offering provides specialized engineering capabilities to design, implement, manage, and operate hybrid cloud environments, modernize networks and AI infrastructure from the core to the edge, and incubate new infrastructure and device services to help clients stay ahead with the latest technology advances.

19 days ago

Network Security Engineer (Firewall & Vulnerability Management) Peraton

Washington, D.C.

$135,000–$216,000 / year
Full time

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.

1 day ago

Network Security Engineer Booz Allen Hamilton Inc

fort meade, MD

$99,000–$225,000 / year

3+ years of experience with firewall and enterprise security design, including device hardening, intrusion detection and intrusion prevention systems, SIEM, firewalls, internet protocol security, and vulnerability assessment. This is your chance to share your experience with backbone networks, cloud technologies, and core networking while broadening your security and network engineering work.

9 days ago

Counsel, Consumer Protection and Network Security Policy Verizon Communications Inc

Washington, DC

$161,000–$280,000 / year

Verizon seeks a technically-sophisticated attorney to join its policy organization's Regulatory Affairs team, which handles advocacy efforts across jurisdictions on various issues, including infrastructure, cybersecurity, privacy, artificial intelligence, public safety, transactions, net neutrality, consumer protection, and wireless spectrum. This position will focus on government policy initiatives relating to robocalls/robotexts, fraud/scam mitigation, network security/resilience, and consumer protection, including Telephone Consumer Protection Act issues.

27 days ago

Senior Network Resident Engineer – Enterprise Security & Switching (Top Secret) Jobot

Alexandria, VA

$140,000–$190,000 / year
Quick Apply

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. You'll support client engineers on new deployments, act as the primary contact for operational issues, troubleshoot firewall, routing, and switching problems, and work cases with the manufacturer's support center through to resolution.

6 days ago

Network Security Systems Instructor IV OBXtek Inc

Springfield, VA

4+ years of technical skills and experience of installing, programming, troubleshooting, and repairing any of the following Network Security Systems: command line interface-based IT equipment, electronic systems, IoT devices, network-based CCTV, computer network equipment, installation of infrastructure, copper and fiber optic communication and signal wiring, enterprise managed networking hardware, and software configuration. The instructor must be an excellent communicator and possess solid technical skills in any of the following Network Security Systems (NSS) disciplines: High-Definition Security Video Systems, Data Center Configuration and Management, or Cyber Security Countermeasures.

6 days ago

Network Engineer All Levels- -TS/SCI w/ Poly Security Clearance Required Tulzi Technologies

Laurel, Maryland

$125,000–$175,000 / year

Clearance Required: TS/SCI w/poly Title: Network Engineer 3 Location: Laurel, MD Salary Range: $125-175K Description of responsibilities: Experience with Cisco, Visio, IP Spaces, VPN knowledge and scans. Tulzi Technologies, LLC (Tulzi) prides ourselves on an open, and honest culture in the workplace which builds a morale conducive to inspiring growth on our team, while balancing lifestyle by supporting personal and family goals with flexibility.

21 days ago

Deputy Network Operations Security Center (NOSC) Manager Leidos

Fort Belvoir, Virginia

The I3TS program provides enterprise-wide IT support to enable the Defense Threat Reduction Agency’s (DTRA) Information Management & Technology Directorate (J6) to consolidate, modernize, and continuously innovate the delivery of IT services and mission capabilities to DTRA’s internal and external mission partners operating in CONUS and OCONUS locations. September 3, 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.

2 days ago

Network Engineer 2| TS/SCI w/ poly Security Clearance Tulzi Technologies

Annapolis Junction, Maryland

$135,000–$145,000 / 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) . Tulzi Technologies, LLC (Tulzi) prides itself on an open, and honest culture in the workplace which builds morale conducive to inspiring growth on our team, while balancing lifestyle by supporting personal and family goals with flexibility.

21 days ago

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Network Security Jobs in Springfield, VA

Senior Security Engineer-Network Security Assessment & Post-Quantum Cryptography (PQC) - Hybrid ATD Technology LLC

Network Security Engineer Twitter

Cisco Network Security Engineer/ Senior Consultant Deloitte

Network Engineer – VDI Security / Network Infrastructure TalentOps

Sr. Network Engineer (Cisco & Network Security) Themis Insight

Network Security Engineer SpaceXSI

Cyber Network Security Architecture - Senior Manager Deloitte

Sr. Network Security Engineer III (6852) MetroStar Systems

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

5Yrs Senior Network Security Engineer with cisco exp - Onsite GoIntellects

Principal Network Security Engineer JCS Solutions LLC

Security Operations Center (Soc) Network Engineer/Systems Integrator - Secret Clearance - Naples, Italy Deloitte

Network Security Engineer (Firewall & Vulnerability Management) Peraton

Network Security Engineer Booz Allen Hamilton Inc

Counsel, Consumer Protection and Network Security Policy Verizon Communications Inc

Senior Network Resident Engineer – Enterprise Security & Switching (Top Secret) Jobot

Network Security Systems Instructor IV OBXtek Inc

Network Engineer All Levels- -TS/SCI w/ Poly Security Clearance Required Tulzi Technologies

Deputy Network Operations Security Center (NOSC) Manager Leidos

Network Engineer 2| TS/SCI w/ poly Security Clearance Tulzi Technologies

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