Information Systems Security Officer

We are seeking an experienced Information Systems Security Officer (ISSO) to play a key role in ensuring compliance with all applicable security regulations across our programs. This individual will be a seasoned professional with deep technical expertise, responsible for overseeing program and project security implementation while contributing meaningfully to department goals and long‑term planning. The ideal candidate demonstrates sound judgment, knows when to elevate issues appropriately, and collaborates effectively with internal teams and customers.

Please note that this job description is not intended to be an exhaustive list of all responsibilities or duties associated with the role. Responsibilities may evolve or additional tasks may be assigned at any time, with or without notice.

Please Note: U.S. Citizenship is required.

Role And Responsibilities

Responsibilities and duties may include, but are not limited to:

Perform day-to-day maintenance of systems, including auditing and patch managementPerform technical security assessments of complex systemsIdentify points of vulnerability, non-compliance with established Information Assurance (IA) standards and regulations, and recommend mitigation strategiesApply knowledge of IA policy, procedures, and workforce structure to implement secure networking, computing, and enclave environmentsWrite authorization and accreditation (A&A) documentation and ensure the systems are operated and maintained in accordance with these security plansEnforce the design and implementation of trusted relationships among external systems and architecturesSupport security planning, assessment, risk analysis, and risk management for client systems and programsInteract with technical team members from multiple organizations in a diversified, team environmentIdentify overall security requirements for the proper handling of MTSI and client dataPerform system or network designs that encompass multiple enclaves to include those with differing data protection/classification requirementsRecommend system-level solutions to resolve security requirementsEnsure all users have the requisite security clearances, authorizations, need-to-know, and are aware of their security responsibilities before granting access to client systemsConduct periodic reviews of information systems to ensure compliance with the security authorization packagePerform key functions (above) and other security-related tasks as directed on multiple systems, at multiple sites, or for multiple clientsSchedule, perform and maintain records of required IS auditing, patching, maintenance, software/hardware changes, and scanning based on evolving threat/vulnerabilities and customer compliance requirementsAssess changes to an information system 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 vulnerabilitiesMaintain a working knowledge of information system functions, security policies, technical security safeguards, and operational security measuresCoordinate 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 proceduresImplement policies and procedures for responding to security incidents, and for investigating and reporting security violations and incidentsReceive direction/guidance from the MTSI Program Manager and/or Govt technical lead; translate guidance into actionable tasks performed by the project teamManage/execute medium-large tech tasksEnsures assigned tech tasks are properly coordinated/ efficiently accomplished w/best available resourcesServe as technical lead for time critical tech projects, test events/tasks requiring senior level tech expertiseEnsure all required resources (e.g. personnel, HW, SW, facilities, security) are identified to support assigned tasksCoordinate w/Project Manager to verify time phased requirements are identified to meet contractual required deadlinesAccountable for the quality and timely delivery of all technical contract deliverablesEnsure that task related products are consistent in format and content with overall project deliverablesRoutinely engage with Govt technical representative + tech leads for our teammates and subcontractorsActs as a resource/mentor for colleagues with less experienceWorks independently, with guidance in only the most complex situations

Required Skills

Knowledge of federal security requirements and mandates (e.g., RMF, JSIG, FIPS, NIST)Strong Microsoft Windows background with some knowledge of UNIX/LINUXFamiliarity with security procedures in a SCIF/SAPF environmentProficiency in multiple technical areas and application of advanced technical/analytical principlesAbility to understand customer needs and translate them into technical solutionsExperience in overseeing technical studies, complex analysis, and generating reports/presentationsProject management or program management knowledge and experienceStrong problem-solving skills, including breaking down complex problems and prioritizing tasksExcellent communication skills and ability to interface with senior-level customers and teammatesLeadership experience in technical projects, proposals, and internal committees or innovation projects

Required Competencies

All MTSI employees are required to be skilled in the following core competencies:

Collaboration/Teamwork: Engages others across roles through communication and mutual respect, shares insights, enabling effective teamwork to ensure collective success. (teamwork)Technical and Functional Skills: Leverages technical and functional expertise to deliver high performance, addresses challenges, and supports business needs while pursuing continuous skill development. (domain knowledge)Entrepreneurialism: Fosters innovation, evaluates ideas, and advances initiatives with sound judgment and organizational awareness to drive growth and impact. (innovation)Communication: Communicates clearly and effectively, fostering understanding, collaboration, and alignment through active listening and impactful messaging. (effective communication)Customer Focus: Prioritizes customer needs, builds trust, and delivers exceptional service by using insights to drive improvements and strengthen relationships. (customer insight)

Qualifications

Bachelor’s degree in Computer Science, Information Technology, Information Security, or related fieldTen (10) years of experience working in an IA-related field and/or five (5) to eight (8) years of experience in IT with a heavy emphasis on systems administrationIn-depth knowledge of Microsoft Windows OS (client and server)CompTIA Security+ or higher-level DoD 8570.01/8140.03 certificationExperience with Linux operating system (RedHat Enterprise Linux)Experience with XACTA-Experience using security hardening, collection, and assessment tools (e.g. SCC, Nessus, Splunk, etc.)Experience with security architectures, firewalls, and network accessExperience with risk managed downloads, information systems sanitization and destruction, PEDs, contaminations, incident response, virus scanning, privileged user access, and hardware/software configuration managementExperience with A&A documentation and system authorization artifactsFrequent sitting for long periods using computer keyboard, zoom conferencing, Microsoft teams, telephone etc.Regular standing and walking to file documents, make copies, meet with leaders/employees in other parts of the building etc.Keyboarding: Entering text or data into a computer or other machine by means of a traditional keyboard (traditional keyboard refers to a panel of keys used as the primary input device on a computer, typographic machine, or 10-key numeric keypad)Work is performed in an office environment and requires the ability to operate standard office equipmentSome work (less than 5%) may require moving and lifting of heavy objects

TRAVEL: 10%

CLEARANCE: An active TS/SCI is preferred or the ability to obtain a TS/SCI clearance.