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Information Systems Security Officer

T-Rex Solutions LLC
$55,000-$75,000
parental leave, tuition reimbursement, 401(k)
United States, Maryland, Fort Meade
Oct 10, 2025

Are you ready to make a significant impact by supporting critical national security infrastructure? T-Rex Solutions is looking for a fully cleared Information Systems Security Officer to join our dynamic team in the Columbia, MD area.

Responsibilities:




  • The Information System Security Officer I provides support for a program, organization, system, or enclave's information assurance program. Provides support for proposing, coordinating, implementing, and enforcing information systems security policies, standards, and methodologies. Maintains operational security posture for an information system or program to ensure information systems security policies, standards, and procedures are established and followed. Assists with the management of security aspects of the information system and performs day-to-day security operations of the system. Evaluate security solutions to ensure they meet security requirements for processing classified information. Performs vulnerability/risk assessment analysis to support certification and accreditation. Provides configuration management (CM) for information system security software, hardware, and firmware. Manages changes to system and assesses the security impact of those changes. Prepares and reviews documentation to include System Security Plans (SSPs), Risk Assessment Reports, Assessment & Authorization (A&A) packages, and System Controls Traceability Matrices (SCTMs). Supports security authorization activities in compliance with the NIST Risk Management Framework (RMF) and any DoD and IC tailored requirements.


  • Plan and coordinate the IT security programs and policies

    *Manage and control changes to the system and assessing the security impact of those changes

    *Obtain A&A for ISs under their purview

    *Provide support for a program, organization, system, or enclave's IA program

    *Serve as the Approval Authority to validate or approve user authorization for accounts associated with systems under their control

    *Understand the authorization boundary of systems

    *Collaboration with System and Network administrators to understand and document data flow and architecture diagrams

    *Knowledge of security controls, the assessment and applicability to systems

    *Maintain operational baseline of systems under their purview

    *Provide ongoing Continuous Monitoring to assigned systems

    *Provide and validate the operational security posture of systems and ensure they are maintained

    *Ability to initiate the reauthorization process of a system that needs reaccreditation

    *Ability to decommission a system when it is no longer required

    *Manage risks while assigned system is in operation

    *Ability to understand the POA&M process as well as track and closeout any outstanding liens

    *Ability to acknowledge and respond to IAVAs and create liens as necessary

    *Perform, coordinate and document security relevant changes

    *Perform vulnerability assessments to ensure updates and system baseline are enforced

    *Recognize a possible security violation and take appropriate action to report the incident

    *Manage protective or corrective measure when an IA incident or vulnerability is discovered

    *Provide security and awareness oversight and/or training as required

    *Review of audit reduction tools to monitor and review systems for compliance with IA policy

    *Excellent written and verbal communication skills

    *Excellent leadership and teamwork skills

    *Results oriented, high energy, self-motivated




Requirements:






  • Candidate may be required to respond to after-hours requests as required in a 24 x 7 environment




    Five (5) years' experience as an ISSO on programs and contracts of similar scope, type, and complexity is required. Experience is to include at least one (1) of the following areas: knowledge of current security tools, hardware/software security implementation; communication protocols; and encryption techniques/tools. Bachelor's degree in Computer Science or related discipline from an accredited college or university is required. DoD 8570 compliance with Information Assurance Technician (IAT) Level I or higher is required. Four (4) years of additional experience as an ISSO may be substituted for a bachelor's degree.

    Required Certification:Any of the following or higher certification; A+ with Continuing Education, Cisco Certified Network Associate-Security (CCNA-Security), Network+ Continuing Education,System Security Certified Practitioner (SSCP)




  • Active TS/SCI w/ FSP


T-Rex Overview

Established in 1999, T-Rex Solutions, LLC is a proven mid-tier business providing data-centric mission services to the Federal government as it increasingly tries to secure and leverage the power of data. We design, integrate, secure, and deploy advanced technical solutions for our customers so they can efficiently fulfill their critical objectives. T-Rex offers both IT and professional services to numerous Federal agencies and is a leader in providing high quality and innovative solutions in the areas of Cloud and Infrastructure Services, Cyber Security, and Big Data Engineering.

T-Rex is constantly seeking qualified people to join our growing team. We have built a broad client base through our devotion to delivering quality products and customer service, and to do that we need quality individuals. But more than that, we at T-Rex are committed to creating a culture that supports the development of every employee's personal and professional lives. T-Rex has made a commitment to maintain the status of an industry leader in compensation packages and benefits which includes competitive salaries, performance bonuses, training and educational reimbursement, Transamerica 401(k) and Cigna healthcare benefits.

T-Rex is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, religion, color, sex (including pregnancy and sexual orientation), parental status, national origin, age, disability, family medical history or genetic information, political affiliation, military service, or other non-merit based factors.

In compliance with pay transparency guidelines, the annual base salary range for this position is $55,000-$75,000. Please note that the salary information is a general guideline only. T-Rex considers factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience, education/training, key skills, internal peer equity, as well as market and business considerations when extending an offer.

T-Rex offers a diverse and collaborative work environment, exciting opportunities for professional growth, and generous benefits, including: PTO available to use immediately upon joining (prorated based on start date), paid parental leave, individual and family health, vision, and dental benefits, annual budget for training, professional development and tuition reimbursement, and a 401(k) plan with company match fully vested after 60 days of employment among other benefits.

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