Discover the latest cybersecurity engineer jobs from companies hiring across the globe. This page features curated opportunities for professionals who design, implement, and maintain security systems that protect organizations from evolving cyber threats.
AI/Systems Engineer: Offensive Cybersecurity
David Joseph & Company
Washington, District of Columbia, US
full-time•
4d ago
REMOTE Cybersecurity Engineer ( W2 direct hire, no C2C )
System One Holdings, LLC
Washington, District of Columbia, US
full-time•
6d ago
Cybersecurity Engineer / Cybersecurity Subject Matter Expert (SME) – Army Tactical System
Washington, D.C.
• On-site
• Full-time Compensation: $160,000–$250,000 + 0.25%–0.75% equity
About The Company
An early-stage (Seed) company building AI-driven systems that conduct end-to-end Cyber Network Operations for the U.S. and its allies. The company is already live with a customer on a high-seven-figure contract and recently closed a round from Tier 1 defense and cyber investors. The team is :15 people, almost entirely technical — including former YC founders/CTOs and engineers from leading AI labs — and operates primarily in person in Washington, D.C. Offensive cyber is a $60B+ market growing toward $100B+ as AI compresses work historically done by specialized security researchers.
Founded 2025
• 11–50 people
• Industry: Security
The Role
Build the systems behind AI-driven vulnerability research and exploit development. This is not a prompt-engineering role — the work is close to the metal: owning problems end-to-end, optimizing for real hardware, and shipping production systems where performance and correctness matter.
What You'll Be Doing
• Build production systems that conduct AI-driven vulnerability research and exploit development at scale
• Work close to the metal: operating system internals, kernel-level interfaces, low-level performance optimization
• Own problems end-to-end across architecture, implementation, and shipped production code
• Partner directly with vulnerability researchers, security operators, and the engineering team to convert manual cyber operations into automated, repeatable systems
• Help define the standards and operating cadence of a team that intends to set the bar for AI-native offensive cyber
Tech stack: Low-level systems — OS internals, kernel, runtime detection, dynamic analysis / dynamic interception; AI/ML systems work
Requirements
• Low-level systems (OS, kernel, runtime), non-negotiable
• 2+ years engineering experience
• Strong builder, ships production code
• Comfort with ambiguity and uncertainty
• Cyber or top AI startup background preferred
• DC in-person, full relocation provided
Green Flags
• Low-level systems engineering depth, kernel, runtime detection, dynamic analysis, OS internals, or open-source contributions to OS-level tooling. This is the single highest signal named.
• Vulnerability research or CTF background. Many of the strongest candidates have been doing this since age 12 ("hacking their Xbox to get extra Overwatch currency").
• Prior YC company as founder or early engineer. The team includes several ex-YC CTOs and the founder-mode operating bar is the calibration point.
• Engineering experience at xAI, Anthropic, Scale, Palantir, Andúril, or comparable top AI / defense tech companies.
• Cyber startup background at companies like Bionic, Island, Oxide, Talon, Dream Security, Margin Security, or low-level groups at Palo Alto Networks (Windows R&D, EDR, non-API).
Red Flags
• "Open to work" banner on LinkedIn.
• Long tenure at large, stable companies (with the exception of low-level security research groups). Suggests comfort with boring work for stability, opposite of the operating bar.
• "Thought leader" framing in profile or bio.
• API-level or applications-level engineering only, with no low-level depth. The role explicitly requires close-to-the-metal experience.
• Cisco background. Named as a culture mismatch even though the skill set could overlap.
Why Join
• Consequential mission: end-to-end AI-driven Cyber Network Operations for the U.S. and its allies
• Live with a customer on a high-seven-figure contract and backed by Tier 1 defense/cyber investors
• A :15-person, almost entirely technical team operating at a founder-mode bar
• A $60B+ market growing toward $100B+
Details
• Location: Washington, D.C.
• Work policy: In person, 5 days/week; full relocation + housing assistance
• Compensation: $160,000–$250,000 + equity
• Visa sponsorship: None available
• Employment type: Full-time
Cybersecurity Engineer Jobs: At a Glance
Insights drawn from the latest openings on this page so you can compare employers, locations, and pay before applying.
Top Companies Hiring
David Joseph & Company1 role
System One Holdings, LLC1 role
CACI International Inc1 role
Noblis1 role
M.C. Dean1 role
Leidos1 role
Top Locations
Virginia, US6 roles
District of Columbia, US3 roles
Maryland, US1 role
Most listings on this page are on-site or hybrid.
Salary Range Overview
Across 10 listings, advertised pay ranges from USD 100k to USD 250k.
Typical band: USD 146k – 202k.
Figures reflect employer-disclosed salaries on current openings and may vary by location, experience, and company stage.
Employment Types
Full-Time10 roles
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Here are some of the latest openings matching this category. Browse the full list above to filter by location, experience, and employment type.
#1AI/Systems Engineer: Offensive Cybersecurity
David Joseph & CompanyWashington, District of Columbia, USFull-TimeUSD 160k–250k / yearPosted Jun 26, 2026
Washington, D.C. • On-site • Full-time Compensation: $160,000–$250,000 + 0.25%–0.75% equity About The Company An early-stage (Seed) company building AI-driven systems that conduct end-to-end Cyber Network Operations for the U.S. and its allies. The company is already live with a customer on a high-seven-figure contract…
#2REMOTE Cybersecurity Engineer ( W2 direct hire, no C2C )
System One Holdings, LLCWashington, District of Columbia, USFull-TimeUSD 100k–125k / yearPosted Jun 24, 2026
*** This is a direct hire role • ** NO C2C candidates, NO 3rd parties • ** Must-have domain experience: ideally, experience on projects for HUD (the US Department of Housing and Urban Development) or similar state or municipal agencies involved in public housing programs. Alternatively, experience on projects for civil…
#3Cybersecurity Engineer / Cybersecurity Subject Matter Expert (SME) – Army Tactical System
CACI International IncFort Belvoir, Virginia, USFull-TimePosted Jun 29, 2026
Job Title: Cybersecurity Engineer / Cybersecurity Subject Matter Expert (SME) – Army Tactical System Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: Secret Employee Type: Regular Percentage of Travel Required: Up to 25% Type of Travel: Continental US * * * The Opportunity …
NoblisWashington, District of Columbia, USFull-Time
Responsibilities • This is for a potential upcoming opportunity. Position Overview The Cyber Security Engineer (CSE3) provides cybersecurity engineering and Risk Management Framework (RMF) support to the PMS 339 Surface Training Systems Program Office. This role supports cyber planning, cybersecurity engineering, asses…
M.C. DeanChantilly, Virginia, USFull-TimeUSD 125k–188k / yearPosted Jun 29, 2026
Overview About M.C. Dean M.C. Dean is Building Intelligence®. We design, build, operate, and maintain cyber-physical solutions for the nation's most mission-critical facilities, secure environments, complex infrastructure, and global enterprises. With over 9,000 employees, our capabilities span electrical, electronic s…
LeidosBethesda, Maryland, USFull-TimePosted Jun 22, 2026
Description Leidos has an exciting opportunity for Cybersecurity Engineer SME in our Intel Security Sector's Analysis Solutions Business Area. Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT…
Carnegie Mellon UniversityArlington, Virginia, USFull-TimePosted Jun 23, 2026
Position Summary: Do you want to make a difference and help support the resilience and security of the nation? As part of the Cyber Risk and Resilience Directorate, you will be part of a team of cyber security engineers applying the latest tools, techniques, and methods to cyber security and operational resilience chal…
22nd Century Technologies, Inc.McLean, Virginia, USFull-TimePosted Jun 29, 2026
Position Title: FireEye / Gigamon Cybersecurity Engineer Client: DCMA Enterprise Network Support Services (ENSS) Location: 22nd Century Technologies, McLean, VA Clearance: Active DoD Secret Clearance Required Certification Requirements: • Security+ CE (IAT Level II minimum), CASP+, CISSP, CCNP Security, or equivalent p…
Two Six TechnologiesAlexandria, Virginia, USFull-TimeUSD 197k–246k / yearPosted Jun 12, 2026
At Two Six Technologies, we build, deploy, and implement innovative products that solve the world's most complex challenges today. Through unrivaled collaboration and unwavering trust, we push the boundaries of what's possible to empower our team and support our customers in building a safer global future. Two Six Tech…
Alaka`ina Foundation Family of CompaniesArlington, Virginia, USFull-TimePosted Jun 25, 2026
Bering-Alaka`ina Holdings (BAH) is looking for a Senior Cybersecurity Engineer to support our government customer located in Arlington, Virginia. We are seeking a talented Senior Cybersecurity Engineer with a minimum of five years of experience in the implementation and maintenance of Splunk enterprise monitoring and o…
Discover the latest cybersecurity engineer jobs from companies hiring across the globe. This page features curated opportunities for professionals who design, implement, and maintain security systems that protect organizations from evolving cyber threats.
Cybersecurity Engineers build and manage security infrastructure including firewalls, intrusion detection systems, SIEM platforms, endpoint protection, and encryption protocols. Employers are seeking candidates with expertise in network security, cloud security, application security, threat modeling, and security automation. Knowledge of security frameworks such as NIST, ISO 27001, CIS, and MITRE ATT&CK is frequently required.
These roles are in high demand across industries including financial services, healthcare, government, defense, technology, and critical infrastructure. Cybersecurity engineers often collaborate with DevOps and engineering teams to embed security into every layer of the technology stack.
Our curated listings include remote, hybrid, and onsite positions across North America, Europe, Asia-Pacific, and other global markets. Many roles offer competitive salaries, security clearance sponsorship, certification support (CISSP, CISM, CompTIA Security+), and opportunities to defend against sophisticated cyber threats.
Each job posting provides detailed information about required skills, certifications, and application instructions to help you find the right cybersecurity engineering role.
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