Senior Cybersecurity Engineer

We are an employee-centric company that truly values our team members and the contributions they make to our customers and the missions they support. We pride ourselves on being forward-leaning thinkers and on building teams that are, and continue to be, technically proficient across a broad range of cyber mission areas. OneZero full-time employees receive a highly competitive benefits package, including health, dental, vision, and life insurance, a 401(k) with company matching, paid time off and holidays, an employee referral program, and educational assistance. Additional details are available on our website:


Position Title : Senior Cybersecurity Engineer

Location: On-site in a SCIF in the National Capital Region (NCR) - Nebraska Avenue Complex, Washington, DC (work locations transitioning to ICCB Bethesda / St. Elizabeths). Telework is not authorized; a designated Key Person must be available on-site during core hours

Clearance: TS/SCI

Job Summary

Provides technical leadership for cybersecurity architecture, cloud security engineering, Zero Trust, AI security and DevSecOps integration across DHS Intelligence Enterprise environments.

Education and Experience:

• Bachelor's degree in Engineering, Cybersecurity, or related field or a minimum of 14 years equivalent job experience working in an enterprise infrastructure security and engineering role.

• Minimum of 10 years of security engineer experience.

• Previous experience (at least 4 years) with performing security engineering in a cloud environment, specifically supporting AWS.

• 10+ years of experience in cybersecurity engineering.

• Experience with cloud security and hybrid environments.

• Required: AWS certification, CISSP, Scrum (Agile/DevSecOps related),

• Preferred: Linux, system administration, networking, and cloud proficiency.

• Preferred Certifications: Azure/O365 cloud certs

• Proficiency in Tenable and equivalent products.

• Proficiency in static code analysis.

• DOD STIG/CIS Benchmark proficiency.

• Understand the full security engineering lifecycle from requirements to deployment.

• Knowledge of IaaS, PaaS and SaaS architectures.

Essential Duties:

• Subject matter expert for the organization in security standards and best practices.

• Regularly perform security audits, vulnerability analysis, and provide reports.

• Assess, and recommend scalable, flexible, and resilient cloud architectures incorporating IT security, AI considerations and safeguarding requirements.

• Develop best practices and security standards for the organization.

• Architect, design & implement Zero Trust solutions.

• Develop, maintain and troubleshoot scripts to facilitate the integration and automation of security requirements throughout DevSecOps activities.

• Review and recommend improvements in Enterprise Audit sharing agreements, processes, and technologies between client and other federal agency systems.

• Design, implement, and improve secure system architectures aligned with DHS and IC requirements.

• Perform system hardening, security configuration, and vulnerability mitigation for enterprise platforms and mission systems.

• Integrate security controls into DevSecOps pipelines, automation frameworks, and Agile system development processes.

• Evaluate, deploy, and integrate cybersecurity tools and technologies to enhance continuous monitoring and situational awareness.

• Collaborate with cross-functional teams to embed cybersecurity engineering practices throughout the system lifecycle.

OneZero Solutions, LLC is an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, pregnancy, genetic information, disability, status as a protected veteran, or any other protected category under applicable federal, state, and local laws.

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