$141,500–$236,000 Per Year
Analysis Skills, Auditing, CISM - Certified Information Security Manager, CISSP - Certified Information Systems Security Professional, Cloud Computing, CompTIA Security+, Computer Maintenance, Computer Network Defense (CND), Computer Security, Computer Services, Customer Relations, Customer Service Systems, Data Analysis, Document Management, Documentation, Federal Contracts, Federal Government, GSLC - GIAC Security Leadership Certificate, Government Contracts, Government Intelligence, Intelligence Agencies, Internet Security, Inventory Management, Inventory Reports, Maintain Compliance, Network Operations Center, Office Equipment, Operations, People Management, Presentation/Verbal Skills, Process Management, Risk Management Framework (RMF), Sensitive Compartmented Information (SCI), ServiceNow, Software Administration, Software Development, Systems Analysis, Systems Maintenance, Top Secret Clearance, Vulnerability Scanners
General information
Requisition #
R68799
Locations
USA-MD-Columbia
Posting Date
06/18/2026
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 driven, and customer-focused Information System Security Officer (ISSO) to join our team in Columbia, MD.
You will play a critical role in supporting enterprise infrastructure capabilities for a global, mission-focused workforce. As an ISSO, you will work alongside customers, Integrated Product Teams (IPTs), and vendors to support the implementation and compliance of advanced EIT capabilities through Data Center & Compute Services. You will manage cybersecurity documentation, assess system vulnerabilities, and support the Risk Management Framework (RMF) lifecycle in alignment with Sponsor policies.
Responsibilities include, but are not limited to:
- Update and maintain hardware and software inventory records, including associated change logs
- Support and coordinate Secure the Enterprise (STE) and Secure the Network (STN) activities
- Review and address Xacta notices and ensure compliance documentation is accurate and current
- Complete SEAR audit log records in accordance with Sponsor standards
- Track, review, and resolve POAMs (Plan of Action and Milestones) related to IAVA/IAVAx findings
- Develop and maintain System Security Plans (SSPs) for both new and existing systems
- Analyze vulnerability scan results and collaborate with system owners to implement remediation
- Leverage sponsor tools such as Gatekeeper, Xacta, SEAR, and LatteArt in daily operations
Minimum Qualifications:
- Bachelor's degree with 10 years of relevant experience OR 4 additional years of ISSO experience may be substituted for the Bachelor's degree
- Experience with Xacta, LatteArt and other sponsor tools
- Experience managing POAMs, performing audit log reviews, and maintaining secure system inventories
- IAM I certification (DoD 8140 required upon start of employment. Acceptable certifications include CAP/CND/Cloud+/GSLC/Security + CE/HCISSP/CASP+CE/CISM/CISSP/ or CCISO)
Preferred Qualifications:
- Knowledge of STE and STN processes and coordination
- Experience with Gatekeeper, SEAR, SCANBOY
- Experience with the Service Now (SNOW) platform
Clearance Requirements:
- Must possess and maintain a current/active TS/SCI clearance with Polygraph
Physical Requirements:
- Must be able to remain in a stationary position 50% of the time
- Occasionally moves about inside the office to access file cabinets, office machinery, etc.
- Frequently communicates with co-workers, management, and customers, including delivering presentations. Must be able to exchange accurate information in these situations.
The projected compensation range for this position is $141,500.00-$236,000.00. 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.
M
ManTech International Corp
Our Mission
Our mission is empowering our nation through a diverse and skilled workforce securely delivering innovative technology, consulting services and digital solutions for our customers’ mission success, every day.
Our Vision
Our vision is Securing the Future as the most trusted partner for U.S. Defense, Intelligence and Federal Civilian customers through the power of One ManTech. When these agencies think of an essential partner for their national and homeland security needs, they think ManTech.
Our Values
Our values are grounded in a bedrock of truth, integrity and caring for each other and the mission. We hold steadfast to:
• TRUST – We earn and protect the trust of our customers, employees and investors through an enduring foundation of respect, fairness, credibility and honoring our commitments, always.
• INCLUSION – We are an inclusive, diverse and talented workforce with a passion for mission success, intellectual capital, creativity and integrity. Our high ethical standards and investment in our people build confidence with our customers.
• QUALITY– We deliver exceptional quality to customers through differentiated technology solutions and an uncompromising focus on excellence, value and innovation.
5,000 to 9,999 employees
https://www.mantech.com/about