Sr. Vulnerability Researcher (US)

VulnCheck stands behind its mission to influence how organizations worldwide understand, assess, and remediate security vulnerabilities — and to deliver intelligence-based solutions that change the world.

You'll be joining a collaborative, supportive environment that values intellectual curiosity, technical mastery, and personal growth. (And more, below!)

Leverage your expertise: Work on cutting-edge threat intelligence initiatives that matter, alongside the top domain experts in the field.

Shape the industry: Influence how vulnerabilities are classified, scored, mapped, and remediated at scale for enterprise customers and for the entire cybersecurity industry.

Grow your impact: Collaborate with global partners, lead high-visibility research, and drive standards across the security community.

Innovate and explore: Conduct original research and develop tooling — including agentic and automated approaches — for finding and understanding new vulnerabilities.

Conduct vulnerability research to identify net-new vulnerabilities across a range of operating systems, platforms, and devices

Reverse engineer a variety of firmware and software

Author original exploits, network rules (Suricata / Snort), and other artifacts (e.g., Docker containers, version scanners, ASM queries) to accompany new vulnerability finds

Apply and expand agentic approaches to scale vulnerability discovery and exploit development

5+ years of full-time vulnerability research experience, including experience targeting networking device firmware, embedded Linux/RTOS-based systems, and/or network protocols

Demonstrable experience with agentic approaches to vulnerability discovery and exploit development

Experience developing original (weaponized) exploit code

Comfort acquiring, unpacking, and analyzing target firmware and appliances, including reasoning about network protocols and unauthenticated attack surface

Familiarity with embedded architectures (MIPS, ARM) and firmware extraction/unpacking (e.g., binwalk).

Experience with dynamic analysis and debugging on embedded/emulated targets (e.g., QEMU)

Working knowledge of common networking protocols (TCP/IP, routing protocols, VPN protocols such as IPsec/SSL-VPN, SNMP, etc.).

Strong reverse engineering skills, including static and dynamic analysis of compiled binaries and firmware (VulnCheck uses Ghidra for reversing)

Strong command of memory corruption and other vulnerability classes (e.g., stack and heap overflows, use-after-free, type confusion, integer errors, command and path injection, authentication and logic flaws)

Solid working knowledge of C/C++ and at least one scripting language (e.g., Python)

Experience working on technical projects remotely, alone, and on small teams.

Built on over two decades of cybersecurity experience, our team of experts understands the intricacies of vulnerabilities, their exploitation in the wild, and how to leverage this data to build more effective cybersecurity products that produce better outcomes for organizations.

VulnCheck gives organizations a tactical advantage by providing best-in-class exploit & vulnerability intelligence information. We have a sense of duty to protect the critical infrastructure we rely on including medical devices, power grids and telecommunication networks. We were founded in 2021 in Lexington, Massachusetts.

VulnCheck has a transparent, collaborative, and supportive culture — we are looking for people who have a growth mindset, are curious and innovative. Our team is smart, but humble, hardworking, and supportive.

VulnCheck is proud to be an Equal Employer Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. VulnCheck is committed to working with and providing reasonable accommodations to applicants with physical and mental disabilities. Even if your experience doesn't perfectly align with the job description, we encourage you to apply—we value potential just as much as a perfect resume.