Senior Cyber Security Engineer

General information

Requisition #

R71658

Locations

USA-VA-Chantilly, USA-CO-Denver

Posting Date

10/26/2026

Security Clearance Required

TS/SCI w/ Poly

Remote Type

Onsite

Time Type

Full time

Description & Requirements

Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we've been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now-unleash your potential with MANTECH!

MANTECH seeks a motivated, career and customer-oriented Senior Cyber Security Engineer to join our team in Chantilly, VA or Denver, CO.

The Senior Cyber Security Engineer will leverage their strong technical background to support specialized cybersecurity systems, work directly with customers on tool onboarding and troubleshooting, and provide Tier 2 and 3 maintenance support across deployed technologies.

Responsibilities include but are not limited to:

• Working closely with customers on onboarding, updates, and troubleshooting issues with cybersecurity tools, while providing support via phone, email, or messaging services.
• Providing Tier 2 and 3 maintenance support, engineering support, and system administration for specialized cybersecurity applications, including installation, configuration, maintenance, patching, and backup/restore operations.
• Collaborating with engineers on troubleshooting and building proof-of-concept network topologies, while analyzing customer feedback to assist in overall process improvement.
• Supporting Assessment and Authorization (A&A) activities related to cybersecurity technologies and identifying potential conflicts with enterprise tool implementation.
• Developing recommendations to remediate tool conflicts and providing ideas for automating repetitive project tasks and metrics collection using scripts.
• Updating project documentation and providing insights into workflow efficiencies based on a comprehensive understanding of customer requirements.
• Performing other project and corporate duties as assigned to support customer mission requirements.

Minimum Qualifications:

• Bachelor's degree or 4+ years of relevant experience in lieu of a degree.
• Experience with firewalls, routers, switches, and load balancers.
• Knowledge of Windows and Linux systems administration, general operating system security practices, TCP/IP networking, and network security concepts.
• Knowledge of and proficiency in the use of AWS technologies.
• Must have or be willing to obtain an IAT Level II certification within 3 months of hire.
• Excellent written/oral communications skills, strong analytical and problem-solving skills, and the ability to thrive in a dynamic, agile environment.

Preferred Qualifications:

• Understanding of federal cybersecurity guidance such as NIST SP 800-37 (RMF) and NIST SP 800-137 (ISCM).
• Experience in programming languages such as Python, Go, Java, JavaScript, or Node.js.
• Ability to function in a fast-paced environment, effectively manage multiple tasks simultaneously, and interact with various levels of senior management.
• On-the-job training availability for RedSeal, Forward Networks, and other specialized cybersecurity tools.

Clearance Requirements:

• An active TS/SCI with Polygraph.

Physical Requirements:

• Must be able to remain in a stationary position 50% of the time.
• Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine, and computer printer.
• Frequently communicates with co-workers, management, and customers, which may involve delivering presentations, and must be able to exchange accurate information in these situations.
• Ability to work in a cubicle environment without distractions.

The projected compensation range for this position is $114,600.00-$190,200.00. 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. In addition, MANTECH invests in its employees beyond just compensation. 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.