FULL_TIME

FEED

UNKNOWN

Overview: We are seeking an experienced Senior Penetration Tester / Offensive Security Engineer to conduct hands-on security assessments, identify vulnerabilities, evaluate enterprise architectures, and develop actionable risk and threat mitigation strategies. This role requires deep technical expertise in penetration testing, adversarial tactics, system exploitation, network security analysis, and enterprise infrastructure.

Software Engineer

[AW]-iCims

Our three operating units: Space Electronic Systems (SES), Integrated C4ISR Systems (ICS) and Optical Precision Systems (OPS), develop within the agile framework which enables us to produce proven, purpose-built systems that solve our customers' mission critical challenges across space, air, land, and sea. However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractor's legal duty to furnish information.

YEAR

Trident Systems Incorporated is a veteran-owned business founded in 1985 with one purpose in mind: to deliver innovative and affordable technology solutions for mission critical government and commercial needs.  Thirty years later, Trident continues to harness emerging technology to provide leading-edge solution to both the military and intelligence communities, as well as a broad spectrum of commercial and international customers.  

Trident Systems Inc

Network Engineer 3

linkup_via_bold

Eight (8) years of experience directly supporting a complex infrastructure covering the major aspects of network administration with expertise in troubleshooting IPv4 issues across various protocols and technologies such as OSPF, BGP, EIGRP, static routing, SSH, ACL, VLAN, VTP, STP, SNMP, LACP, vPC, vPort Channels, Wireshark, and TCPdumps with added familiarity in hybrid connectivity to AWS environments. Five (5) years of experience configuring, administering, and maintaining network IT monitoring and management software such as Netscout nGenius and SolarWinds (i.e., NetFlow traffic analysis, bandwidth monitoring, PerfStack, network performance baselines, Traffic Analyzer, IPAM, and NetPath) including monitoring hybrid on‑prem/AWS network paths.

Tria Federal

Network Engineer 4 - Infrastructure

GreenHouseAPI

You will work on routing and switching, WAN and LAN transport, wireless, segmentation, and firewalls in a mixed Cisco, Juniper, and Arista environment, alongside field deployment teams, cloud engineers, and security staff. U.S. Customs and Border Protection runs continuous operations across more than 300 land, air, and sea ports of entry, plus Border Patrol stations and the Air and Marine Operations Center.

Agile Defense

Network Engineers, Senior Engineers & Architects (CBP)

ea_via_bold

Required Education & Experience: Bachelor''s degree in a network engineering/computer engineering related discipline and 10+ years IT network engineering and architecture experience (Tier III and above, network infrastructure design and implementation) with large, complex networks and cloud environments; Masters and 8+ years of related experience; may accept additional experience in lieu of degree. The SAIC Vanguard 2025 Program provides comprehensive IT support consisting of the Department''s servers, network devices, network perimeter security, anti-virus engineering, public key infrastructure (PKI)/biometrics/encryption, monitoring tools, telephony, mobile computing platforms, virtual environments, cloud services, and enclave design/security engineering.

SAIC is a premier Fortune 500® technology integrator driving our nation's digital transformation. Our robust portfolio of offerings across the defense, space, civilian, and intelligence markets includes secure high-end solutions in engineering, IT modernization, and mission solutions. Using our expertise and understanding of existing and emerging technologies, we integrate the best components from our own portfolio and our partner ecosystem to deliver innovative, effective, and efficient solutions that are critical to achieving our customers' missions.

We are a team of 26,000 strong driven by mission, united purpose, and inspired by opportunity. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.1 billion. For more information, visit saic.com.

Science Applications International Corp

SDWAN Network Engineer

This role provides technical direction across multiple teams and initiatives, translating complex business needs into secure, maintainable, and measurable solutions while leading architecture and engineering decisions for cross-functional capabilities and integrations. Relevant certifications such as Microsoft 365 Administrator Expert, Cybersecurity Architect Expert, Azure Solutions Architect Expert, Power Platform Solution Architect Expert, or Azure AI Engineer Associate.

We know you know GEICO, but we want you to know that with us, you’ll find a rewarding career no matter which path you take. Our over 37,000 associates have been unexpectedly delighted to find that their jobs have turned into successful, illuminating careers. You know us for insurance. Get to know us for careers, too. Visit us at http://www.geico.jobs for more!

Geico Insurance

Senior Staff Engineer, Productivity

Founded in 1997 and headquartered in Washington DC, Expression provides data fusion, data analytics, AI/ML, software engineering, information technology, and electromagnetic spectrum management solutions to the U.S. Department of Defense, Department of Commerce, Department of State, and national security community. As the DevOps lead for the program, you will design, implement, and maintain secure cloud infrastructure and delivery pipelines supporting applications, data services, and analytics across Azure Commercial, Government, and Secret cloud environments.

Expression

Senior DevOps Engineer (Remote)

This research continues many of the directions our team worked on prior to Anthropic, including: GPT-3, Circuit-Based Interpretability, Multimodal Neurons, Scaling Laws, AI & Compute, Concrete Problems in AI Safety, and Learning from Human Preferences. Whether we''re developing critical security infrastructure, building secure development practices, or partnering with our research and product teams, we are committed to operating as a world-class security organization and keeping the safety and trust of our users at the forefront of everything we do.

Anthropic PBC

Security Engineer, Offensive Security

OTHER

Riverwoods, IL: $179,400 - $204,700 for Security Engineer 4. McLean, VA: $197,300 - $225,100 for Security Engineer 4. Plano, TX: $179,400 - $204,700 for Security Engineer 4. 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. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation, please contact Capital One Recruiting at 1-800-304-9102 or via email at RecruitingAccommodation@capitalone.com.

Capital One

Security Engineer 4

equestftpin

McLean, VA: $197,300 - $225,100 for Security Engineer 4. Plano, TX: $179,400 - $204,700 for Security Engineer 4. Richmond, VA: $179,400 - $204,700 for Security Engineer 4. 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. Architect, engineer, and deploy enterprise-grade IAM frameworks by utilizing advanced data engineering and programmatic automation to build resilient, high-availability identity solutions.

Security Engineer 4 (SailPoint)

We are particularly interested in individuals who have directly evaluated AI security vulnerabilities, performed adversarial testing, assessed secure AI architectures, or advised government programs on AI risk management. Bachelor's degree in physics, mathematics, computer science, cybersecurity, or a relevant engineering discipline, including electrical, computer, systems, or software engineering.

Our employees are our greatest resource and each member of the team is just as important as the next.  We enjoy a flat organization where constructive comments are welcome and seen as detailed information on how to build a stronger company.

Trust, Flexibility and Responsibility are three key elements of our values that allow the freedom for our employees to create their own paths to success. We are always seeking out individuals who are 100% in all categories and understand the importance of teamwork.

In order to retain the best, we offer exceptional benefits for:
Health, Dental & Vision
An optional Flexible Spending Plan
401k Matching
Tuition Reimbursement
Life Insurance
We also offer generous paid vacation, as well as, performance recognition awards and referral bonuses. Contact us for more information or to send us your resume. We look forward to hearing from you and hopefully welcoming you to the team soon!

TRIAEM LLC is an 8(a), Economically Disadvantaged Woman-Owned Small Business (EDWOSB) based in Sterling, Virginia.   TRIAEM is known for providing exceptional people who all have proven experience supporting military and intelligence operations worldwide with exceptional results, 100% of the time.  Business areas surround non-developmental, Systems Integration & Engineering, Cyber Security, Acquisition and project/program management oversight support to organizations that require OCI-free professional services without the burden of recently revised Organizational Conflicts of Interests rulings.  The majority of the diverse TRIAEM staff have education levels ranging from recent college graduates to PhD’s and have industry recognized certifications in:
PMP ®
ITIL
Agile
SAFe
SCRUM Master
Certified Ethical Hacker (CEH)
CISSP certified


TRIAEM, LLC

Senior AI Security Engineer / Technical SETA SME

partner Hirebridge

In addition, this GRC team member will manage and maintain Continuous Monitoring artifacts and annual assessments for Grok for Government, and should be equally comfortable interpreting control requirements and partnering directly with engineers to design, implement, and validate the controls themselves. 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.

SpaceXSI

Security Engineer, GRC Federal Frameworks

We look for low-ego individuals who thrive in dynamic and fast-moving environments and move with an experimental mindset — who rapidly test emerging capabilities to discover simpler, more powerful ways to deliver results. You have taken at least one system through authorization to operate under a government security control framework (NIST 800-53 / RMF, FedRAMP, or the DoD RMF and its Impact Levels), and you can point to the package you were responsible for.

Snowflake

Information Systems Security Engineer

sourcestack_via_bold

Build defensive automation: Design, build, and improve AI-driven security tooling, with the testing, safeguards, and human oversight you’d expect of production systems. You’ll work across the full lifecycle, from discovery and threat modeling through remediation and response, and go deep in either offensive research or defensive operations based on your strengths.

Norm

AI Security Engineer, Defensive Automation

Youre thinking about prompt injection, model poisoning, data exfiltration from training pipelines, and the attack surfaces that most teams havent mapped yet. Youll build automated tools to scale what you do, contribute to how we measure security as a program, and help the whole engineering team raise their security instincts.

Range Finance, Inc.

Senior Security Engineer

Established in 2015, Fantom Corp serves Federal customers with top-notch Cybersecurity Architects, Data Scientists/Analysts, Software Engineers/Developers, DevSecOps Engineers, Project Managers, Identity, Credential Access Management (ICAM) services, and Cloud-certified practitioners. #CJ Fantom Corp is a Software Development, Agile Cloud, Software Development, Cyber Security (Risk Management, Assessments & Authorization (A&A)), Data, AI Platform (Computer Vision Models), Podcasting Media Services, and IT Services provider.

Fantom Corporation

Security Engineer

As part of the SES Strategic Business Unit, you will be part of a team that designs, engineers, integrates, operates and maintains electronic security services to include intrusion detection, access control, biometric authentication, video surveillance, audio visual, IT systems, perimeter defense and command and control systems for federal, local and commercial customers across high-growth markets. Research, prototype, and develop emerging technologies by working closely with industry partners and OEMs to implement the latest and best-in-bread capabilities to meet the customers’ emerging needs.

M.C. Dean is Building Intelligence™. We design, build, operate, and maintain cyber-physical solutions for the nation’s most recognizable mission-critical facilities, secure environments, complex infrastructure, and global enterprises.
The company’s capabilities include electrical, electronic security, telecommunications, life-safety, instrumentation and control, and command and control systems.
M.C. Dean is headquartered in Tysons, Virginia and employs more than 4,000 professionals engineers,technicians, and staff who deploy worldwide automated, secure, and resilient power and technology systems; and deliver the management platforms essential for long-term system sustainability.

M.C. Dean, Inc

Security Systems Engineer 3 - Washington, DC

ADAPTED_NOW

HOUR

Deep practical knowledge of legacy Gen 2/Gen 3 Palo Alto hardware, including PA-3000 and PA-5000 series platforms, legacy CLI, hardware troubleshooting, and line-card replacements. Advanced understanding of BGP, OSPF, IPSec VPNs, NAT, TLS/SSL, mutual TLS (mTLS), HTTP, SAML, OAuth, OCSP revocation, DoD PKI, Kerberos, LDAP, and Active Directory.

Every day, System One focuses on services and solutions that require a high degree of specialization, in-demand technical skills, and large-scale operational expertise. We are essential partners to those on the front lines of our nation’s most critical infrastructure, technology, and life sciences initiatives. 
Founded more than 40 years ago as a staffing partner to the engineering industry, today System One is a diversified organization operating in over 50 locations and putting more than 9,000 people to work in the United States, Canada, and the United Kingdom.

System One

Palo Alto Firewall Engineer

The Cybersecurity / IAM Engineer works closely with DevSecOps, software, and infrastructure teams to embed security best practices into all phases of the system lifecycle, including secure configuration baselines, continuous monitoring, vulnerability management, and incident response. Job Summary: The Cybersecurity / IAM Engineer is responsible for architecting, implementing, and maintaining advanced cybersecurity and identity and access management (IAM) solutions across all client environments, including cloud, IoT, edge, and data systems.

NTT DATA Group Corp

Cybersecurity / IAM Engineer - REMOTE

Manages delivery across multiple engagements including business intelligence, technology and tradecraft, financial operations, workforce analytics, cyber, artificial intelligence, risk management, and product development to enhance organizational performance (Python, SQL, Tableau, AWS). Demonstrated expertise in AI/ML solution development, data science practice, data strategy and governance, and customer and stakeholder engagement – all developed over many years of client work delivering solutions.

PLANIT Group is a fast-growing global technology consulting firm dedicated to delivering innovative solutions to our clients that drive results. We collaborate with our partners and customers to help them improve performance, efficiency, and quality. Our team delivers innovative solutions and services - including management consulting, systems integration, ERP solutions, enterprise architecture, communications, and infrastructure services. We focus on delivering value and driving increased productivity and efficiencies for our clients’ mission. Our extensive experience in the Federal, Defense, Intelligence, State, Local, Healthcare and Commercial industries delivers proven results and accelerated benefits.
Clients engage PLANIT for our expertise, innovative approach, and our exceptional team. We promote a creative, client-centric work environment and culture, striving to provide challenging and rewarding opportunities for our company’s employees and partners. Integrity and innovation are the core principles of our company philosophy. Our customers engage us to create solutions to complex mission challenges, and PLANIT delivers. For more information, visit http://www.planitgroup.com/. Innovation. Integration. Integrity.

Security Engineer Jobs in Chantilly, VA

Software Engineer VTG

Network Engineer 3 Trident Systems Inc

Network Engineer 4 - Infrastructure Tria Federal

Network Engineers, Senior Engineers & Architects (CBP) Agile Defense

SDWAN Network Engineer Science Applications International Corp

Senior Staff Engineer, Productivity Geico Insurance

Senior DevOps Engineer (Remote) Expression

Security Engineer, Offensive Security Anthropic PBC

Security Engineer 4 Capital One

Security Engineer 4 (SailPoint) Capital One

Senior AI Security Engineer / Technical SETA SME TRIAEM, LLC

Security Engineer, GRC Federal Frameworks SpaceXSI

Information Systems Security Engineer Snowflake

AI Security Engineer, Defensive Automation Norm

Senior Security Engineer Range Finance, Inc.

Security Engineer Fantom Corporation

Security Systems Engineer 3 - Washington, DC M.C. Dean, Inc

Palo Alto Firewall Engineer System One

Cybersecurity / IAM Engineer - REMOTE NTT DATA Group Corp

Cyber Security Architect/Engineer IV PlanIT Group

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