New

Information Systems Security Officer

Modern Technology Solutions, Inc.
401(k)
United States, Virginia, Alexandria
5285 Shawnee Road (Show on map)
Jul 10, 2026
Modern Technology Solutions, Inc. (MTSI) is hiring an Information Systems Security Officer (ISSO) in Alexandria, VA. Qualified candidates must have an active TS/SCI and already be read on a Special Access Program (SAP). Responsibilities: Perform day-to-day maintenance of systems, including auditing and patch management. Perform technical security assessments of complex systems. Identify points of vulnerability, non-compliance with established Information Assurance (IA) standards and regulations, and recommend mitigation strategies. Apply knowledge of IA policy, procedures, and workforce structure to implement secure networking, computing, and enclave environments. Write authorization and accreditation (A&A) documentation and ensure the systems are operated and maintained in accordance with these security plans. Enforce the design and implementation of trusted relationships among external systems and architectures. Support security planning, assessment, risk analysis, and risk management for client systems and programs. Interact with technical team members from multiple organizations in a diversified, team environment. Identify overall security requirements for the proper handling of MTSI and client data. Perform system or network designs that encompass multiple enclaves to include those with differing data protection/classification requirements. Recommend system-level solutions to resolve security requirements. Ensure all users have the requisite security clearances, authorizations, need-to-know, and are aware of their security responsibilities before granting access to client systems. Conduct periodic reviews of information systems to ensure compliance with the security authorization package. Perform key functions (above) and other security-related tasks as directed on multiple systems, at multiple sites, or for multiple clients. Schedule, perform and maintain records of required IS auditing, patching, maintenance, software/hardware changes, and scanning based on evolving threat/vulnerabilities and customer compliance requirements. Assess changes to an IS by performing periodic self-inspections, tests, and reviews of the IS program to ensure that systems are operating as authorized/accredited and that conditions have not changed; ensure corrective actions are taken for identified findings and vulnerabilities. Maintain a working knowledge of IS functions, security policies, technical security safeguards, and operational security measures. Experience working on DISA Security Technical Implementation Guide (STIG) implementation across multiple operating systems and applications. Coordinate with Information Systems Security Manager, Facility Security Officer (FSO) and Contractor Program Security Officers (CPSO) to define, implement and maintain information security policies, strategies, and procedures. Implement policies and procedures for responding to security incidents, and for investigating and reporting security violations and incidents. Qualifications Required: 5 years of experience in Information Assurance OR 5-8 years of experience in IT with a heavy emphasis on systems administration. Experience with Linux Operating System (RedHat Enterprise Linux) In-depth knowledge of Microsoft Windows OS (client and server). Experience with A&A documentation and system authorization artifacts. Knowledge of federal security requirements and mandates (e.g., RMF, JSIG, Federal Information Processing Standards (FIPS), National Standards of Information Technology (NIST)). Experience with security architecture, firewalls, and network access. Experience with risk managed downloads, IS sanitization and destruction, PEDs, contaminations, incident response, virus scanning, privileged user access, and hardware/software configuration management. Excellent oral and written communication skills. Strong organizational skills and ability to manage multiple tasks concurrently. Excellent time management, scheduling, and organizational skills. Ability to work well independently as well as follow detailed instructions for completing tasks. Must be a team player and be able to work within all levels of a project team. Desired Skills: Experience using security hardening, collection and assessment tools (e.g. SCC, Nessus, Splunk, etc.). Strong Microsoft Windows background with some knowledge of UNIX/LINUX. Knowledge of various computer software applications, hardware platforms, networking components and LAN/WAN architecture. Familiarity with security procedures while working in a SCIF/SAPF environment. Experience working with Defense Counterintelligence and Security Agency (DCSA). Experience with eMASS. Education Requirements: Minimum High School diploma is required and a bachelor's degree in Computer Science, Information Technology, Information Security, or a related field is desired. Possess one of the following technical certifications: Security+, CySA+, CISSP, CGRC, SSCP, CISM, GICSP, GSEC, GSLC, or CASP+. Clearance Requirements: Have an active TS/SCI security clearance and be read onto a Special Access Program (SAP). The pay range for this position is $90,000 to $150,000/year; however, base pay offered may vary depending on established government contract ranges, job-related knowledge, skills, and experience, and other factors. MTSI also offers a full range of medical, financial, and other benefits, dependent on the position offered. Base pay information is based on market location. Applications will be accepted on an ongoing basis. This posting will be renewed periodically until the position is filled. #LI-RC2* Interesting Work: Our co-workers support some of the most important and critical programs to our national defense and security. Values: Our first core value is that employees come first. We challenge our co-workers to provide the highest level of support and service, and reward them with some of the best benefits in the industry. 100% Employee Owned: We have a stake in each other's success, and the success of our customers. It's also nice to know what's going on across the company; we have company wide town-hall meetings three times a year. Great Benefits - Most Full-Time Staff Are Eligible for: Starting PTO accrual of 20 days PTO/year + 10 holidays/year Flexible schedules 6% 401k match with immediate vesting up to $9k annually Semi-annual bonus eligibility (July and December) Company funded Employee Stock Ownership Plan (ESOP) - a separate qualified retirement account Up to $10,000 in annual educational reimbursement Other company funded benefits, like life and disability insurance Optional zero deductible Blue Cross/Blue Shield health insurance plan Track Record of Success: We have grown every year since our founding in 1993. Modern Technology Solutions, Inc. (MTSI) is a 100% employee-owned engineering services and solutions company that provides high-demand technical expertise in Digital Transformation, Modeling and Simulation, Rapid Capability Development, Test and Evaluation, Artificial Intelligence, Autonomy, Cybersecurity and Mission Assurance MTSI delivers capabilities to solve problems of global importance. Founded in 1993, MTSI today has employees at over 20 offices and field sites worldwide. For more information about MTSI, please visit www.mtsi-va.com MTSI embraces nine core values including our first core value of Employees come first. Consistent with our Core Values, we are committed to Equal Opportunity, making decisions without regard to race, color, religion, sex, national origin, age, military/veteran status, disability, or any other characteristics protected by applicable law. MTSI is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants and employees with physical and/or mental disabilities.