Senior Web Application Penetration Tester

SIXGEN’s mission is to deliver agile, mission-ready cybersecurity solutions that empower government and critical infrastructure organizations to stay ahead of advanced cyber threats. We combine innovation, deep expertise, and cutting-edge capabilities to uncover vulnerabilities, protect vital systems, and ensure operational superiority in an ever-evolving digital landscape.

POSITION OVERVIEW

• Position: Senior Web Application Penetration Tester

• Job Type: Full Time

• Location: Remote US. Proximity to Maryland or Virginia is a plus, but not required

• Clearance Requirements: Ability to obtain a Secret Clearance

• Travel: Up to 10%

ABOUT THE TEAM

SIXGEN supports cyber and intelligence missions by serving government and commercial organizations as they overcome global cybersecurity challenges. You’ll work with our highly skilled operators conducting research and assessments based on real-world threats. You’ll simulate adversaries and malicious actors and report details and actionable findings on critical assets and infrastructures. Using innovative processes, tools, and techniques, you’ll predict and overcome cybersecurity vulnerabilities. Your successes will be supported by our diverse team of experienced, technical talent.

WHAT YOU'LL DO

• Conduct comprehensive, black-box penetration testing of web applications to identify critical vulnerabilities such as SQL injection, XSS, CSRF, XXE, deserialization attacks, RCE, etc. Utilize a bug bounty-style approach to independently enumerate and assess targets, simulating real-world attack scenarios.

• Analyze application architecture and source code (when available) to uncover deeper, logic-based or systemic vulnerabilities.

• Document and communicate findings with clear risk assessments, reproduction steps, and actionable remediation recommendations.

• Stay up to date with evolving web technologies, threat trends, and security tools to ensure cutting-edge testing practices.

REQUIRED QUALIFICATIONS

• US Citizen with the ability to obtain a Secret clearance.

• Minimum 5 years of hands-on web application penetration testing experience, with a strong preference for OSCP or equivalent hands-on certifications (e.g. CBBH, CWEE, OSWA, OSWE, GWAPT).

• Proven ability to conduct full-scope penetration tests using tools like Burp Suite, Kali Linux, Metasploit, Nuclei, Nessus, and Nmap.

• Experience developing actionable intelligence based on open source intelligence (OSINT) gathering.

• Experience building offensive capabilities or tools to enhance operations with programming languages such as, but not limited to, Python, Bash, terraform, ansible, etc.

• Experience in testing web-based APIs (i.e. REST, SOAP, XML, JSON).

• Advanced knowledge of manual testing techniques and automated tools (e.g., Burp Suite, OWASP ZAP) to assess application security.

• Familiarity with FISMA and NIST 800-series frameworks; experienced in applying formal testing protocols and methodologies to assess networks, web apps, and cloud environments.

• Strong communication skills for interfacing with clients and documenting findings

• Demonstrated experience working both collaboratively and independently with minimal supervision.

• Awarded CVEs, Cloud, and Active Directory penetration testing is a plus but not required.

COMPENSATION & BENEFITS

Salary Range: $100,000 - $145,000 USD

The salary range for this role is an estimate based on a wide range of compensation factors, inclusive of base salary only. Actual salary offer may vary based on (but not limited to) work experience, education and/or training, critical skills, and/or business considerations. The final salary offer will be determined after a thorough review of the candidate's background and alignment with the role.

Additionally, SIXGEN offers top-tier benefits for full-time employees, including:

• Employer-paid health insurance premiums (medical, dental, vision) for you and your family

• Employer-paid short/long term disability insurance and basic life/AD&D insurance

• 401K with a 4% employer contribution

• Professional development reimbursement options available (training, certification, education, etc)​

• Flexible and remote work policies for most positions

• Flexible PTO and holiday schedule

OUR COMMITMENT

SIXGEN is an Equal Opportunity Employer. We ensure that all applicants are considered for employment without regard to race, color, religion, sexual orientation, gender identity, national origin, disability, age, marital status, ancestry, projected veteran status, or any other protected group or class.

We are committed to fostering an inclusive culture that values diversity in our people, reflecting the communities we serve and our customer base. We strive to attract and retain a diverse talent pool and create an environment where everyone is empowered to be their authentic selves at work.