Senior Principal Cyber Security Engineer - USA Remote

General information Requisition # R67796 Locations USA-Remote Work Posting Date 05/15/2026 Security Clearance Required None Remote Type Fully Remote Time Type Full time Description & Requirements Elevate your career with MANTECH International Corporation! Join a dynamic team dedicated to national security through cutting-edge technology.

Since 1968, MANTECH has led in delivering advanced solutions to government intelligence, the Department of Defense, and Federal Civilian sectors.

Dive into innovation in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development.

Your journey to impactful work and rapid growth starts now—be extraordinary at MANTECH! MANTECH seeks a visionary Senior Principal Cyber Security Engineer to serve as a technical expert within our Enterprise Cyber Security Team.

Reporting directly to the CISO’s office, you will not only administer systems, you will also engineer the resilient, automated, and AI-enhanced security frameworks that protect our most critical corporate assets.

This is a role for a builder-breaker: an expert who can code their way out of a bottleneck, think like an adversary to harden our perimeter, and strategically navigate the security implications of the "Agentic AI" revolution.

Design and maintain immutable security environments using tools like Terraform and Ansible to ensure consistent, reproducible infrastructure.

Develop custom middleware and security tools in Python, Go, or Rust to automate incident response and bridge platform gaps.

Embed automated security gates (SAST/DAST/SCA) directly into internal development pipelines to ensure secure software delivery.

Secure and monitor Azure/AWS/GCP, Kubernetes, and SaaS platforms through configuration auditing and continuous monitoring.

Oversee the security lifecycle of internal APIs, focusing on secure connectivity and robust credential/secrets management.

Govern Generative AI deployments and autonomous agents, focusing on prompt injection mitigation and preventing "non-human" privilege escalation.

Conduct continuous "Purple Team&quot exercises and deep-dive threat modeling to proactive discover and mitigate architectural vulnerabilities.

Minimum Qualifications Bachelor’s or Master’s degree in Computer Science, Cyber Security, or a related STEM field. 10+ years of progressive experience in Cyber Security Engineering, with at least 3 years in a Principal or Lead capacity.

Advanced capability in Python or Go for security automation and API integration.

Expert-level experience securing Azure, AWS, or GCP environments, including serverless functions and container orchestration (Kubernetes).

Azure Security Associate (AZ-500), Certified Kubernetes Security Specialist (CKS), or CISSP.

Preferred Qualifications Experience with the OWASP Top 10 for LLMs and securing vector databases (e.g., Pinecone, Milvus).

OSCP/OSWE (Offensive Security), CASE (Certified AI Security Expert), or CISSP-ISSAP.

Contributions to open-source security projects, published research, or speaking engagements at conferences like DEF CON, Black Hat, or RSAC.

U.S.

Citizen with the ability to obtain/maintain a Top Secret security clearance Physical Requirements Must be able to remain in a stationary position 50% of the time.

Constantly operates a computer and other office productivity machinery.

There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories.

MANTECH’s benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.

MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.

If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.