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Cydecor • Virginia, United States
Salary: 401(K) + compa
Role & seniority: Security Software Engineer / Penetration Tester (mid- to senior-level) for DoD systems.
Stack/tools: Web 2.0, Java, Perl, Ada, C++, Tcl/Tk; Windows/Linux/Unix admin; VxWorks/LynxOS; NSA/DISA STIGs; virtualization and network security gear; PENTEST tools (Kali, Metasploit, NMAP, Cobalt Strike); AWS, REST/SOAP, OAuth2/SAML; Entra ID/Azure AD; Active Directory; Python, C, C++, Go, PowerShell; CI/CD and source tooling (Visual Studio, Rational ClearCase).
Debug, reverse engineer, and mitigate vulnerabilities in DoD software and systems; analyze logs (Windows/Linux) for anomalies.
Perform code reviews, static analysis, and implement secure design/mitigations; contribute to SSAOM and DoD-standard cybersecurity documentation.
Administer diverse OS and network environments; apply encryption, STIGs, and DoD RMF/A&A considerations; support cyber tool development and potential red-team activities.
5+ years software engineering for DoD/IT, 5+ years Linux and Windows administration, and strong penetration testing experience.
Proficiency with Kali, Metasploit, NMAP, Cobalt Strike; CEH/OSCP/OSWP or equivalent; DoD 8570 IAT II or higher.
Experience with VPNs/Firewalls, AD/Entra ID, cloud (AWS); understanding of security protocols, REST/SOAP, and scripting (Python/Perl/C/C++/PowerShell).
Active Top Secret clearance with SCI eligibility; Bachelor’s degree.
Cydecor is a premier Federal Government solutions provider, delivering differentiated innovations in mission systems and business platforms. We leverage leading-edge secure systems and software development, backed by industry-leading subject matter expertise, and business intelligence to enable decision-support and remain ahead of ever-evolving national security challenges. Our success rests squarely on three bedrock principles: People, our center of gravity; Mission, what inspires us; and an unyielding commitment to Excellence, what separates us.
Cydecor is seeking a Security Software Engineer/Penetration Tester to support advanced cybersecurity and software assurance efforts for U.S. Department of Defense (DoD) systems. The ideal candidate will combine deep technical experience in software engineering, penetration testing, and reverse engineering with a strong understanding of secure system design and vulnerability mitigation for enterprise and tactical environments.
Debug and reverse engineer software to identify vulnerabilities and optimize security performance. Analyze Windows Event logs, Linux syslogs, boot logs, and dmesg logs to identify anomalies and security concerns. Program and debug software using Web 2.0, Java, Perl, Ada, C++, and Tool Command Language (Tcl/Tk) scripts, including GUIs and configuration management tools such as Microsoft Visual Studio and Rational ClearCase. Recommend and implement software modifications to mitigate known vulnerabilities. Administer systems running HP-UX, UNIX, Solaris, Linux, and Microsoft Windows operating systems. Identify and remediate security flaws in both compiled and human-readable source code. Understand and work with real-time operating systems (VxWorks, LynxOS), CORBA, firewalls, and networking protocols. Implement NSA-approved encryption technologies and devices and apply DISA Security Technical Implementation Guides (STIGs). Incorporate virtual hosting, server technologies, and deceptive technologies (e.g., honeypots) into system architectures. Perform and participate in code reviews, static source code analysis, and author recommendations to improve software design and security posture. Contribute to the System Security Administrator and Operator’s Manual (SSAOM) and ensure all cybersecurity documentation is maintained to DoD standards.
Associated Training: Certified Ethical Hacker or Offensive Security Certified Professional
Offensive Security Certifications: OSCP, OSCE, OSEE, OSWP
SANS Certifications: GPEN, GWAPT, GXPN, or equivalent Red Team / Penetration Testing certifications COAC Graduate (OSD-sponsored Cyber Operations Academy Course) Capture the Flag (CTF) participation (e.g., DEFCON, Over-The-Wire, Hack the Box, USS Secure CTFs). Published security research resulting in a Common Vulnerabilities and Exposures (CVE) submission.
Experience developing or integrating cyber tools for vulnerability research and exploitation testing. Experience leading software assurance or cyber tool development projects in classified environments. Familiarity with DoD Risk Management Framework (RMF) and A&A processes.
Active Top Secret clearance with SCI eligibility.
Bachelor’s degree
Hybrid, Monday–Friday (8 hours/day). Position is primarily remote, with potential on-site requirements as needed.
Cydecor offers a comprehensive compensation package including Health and Dental Insurance, Vision and Life Insurance, Short-Term & Long-Term Disability, 401(K) + company match, Paid Time Off (PTO), Paid Company Holidays, Tuition and Professional Development Assistance and more.
What We Believe
We have an unwavering commitment to diversity with the aim that every one of our people has a full sense of belonging within our organization. As a business imperative, every person at Cydecor has the responsibility to create and sustain an inclusive environment.
Equal Employment Opportunity Statement
Cydecor is an Equal Employment Opportunity/Affirmative Action Employer (EEO/AA). All employment and hiring decisions are based on qualifications, merit, and business needs without regard to race, religion, color, sexual orientation, nationality, gender, ethnic origin, disability, age, sex, gender identity & expression, veteran status, marital status, or any other characteristic protected by applicable law.
If you are a qualified individual with a disability and/or a disabled veteran, you may request a reasonable accommodation if you are unable or limited in your ability to access job openings or apply for a job on this site because of your disability. You can request assistance by contacting HR@cydecor.com or calling 703-884-2105.