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O365 System Administrator

T-Rex Solutions LLC
$115,000 - $138,000
parental leave, tuition reimbursement, 401(k)
United States, Maryland, Greenbelt
Apr 11, 2025

Since 2016, T-Rex Solutions (T-Rex) has been supporting large scale hybrid-cloud migrations and systems modernization, to include the successful deployment of the first-ever online U.S. Census in 2020. T-Rex is actively expanding its IT Modernization services within the Federal Civilian market, specifically supporting the IRS's strategic priorities.

T-Rex is seeking an O365 Systems Administrator to support the transformation and administration of resilient, secure environments for the IRS. The ideal candidate will be responsible for the management and maintenance of our Office 365 applications, with a focus on setting up and maintaining user accounts, ensuring system enhancements, and supporting Microsoft Exchange in a highly secure, classified environment. All work is performed on-site in Washington, DC.

Responsibilities:



  • Setup of New Users: Provision new user accounts and profiles, and manage Office 365 licenses.
  • User Maintenance: Manage and support user accounts and groups, including password resets, user access issues, and mailbox management.
  • System Enhancements: Regularly review and implement system updates, patches, and enhancements to ensure the optimal performance of the Office 365 environment.
  • OneDrive Maintenance: Oversee and maintain the integrity and security of data stored in OneDrive, including sharing permissions and access controls.
  • Microsoft Exchange Support: Provide end-to-end support for Microsoft Exchange, ensuring smooth and secure email communications within the classified environment.
  • Customer Service: Deliver excellent customer service by communicating effectively with end-users, understanding their needs, and ensuring a positive user experience.
  • Collaboration Tools Management: Administer collaboration tools such as Microsoft Teams and SharePoint, including setup, maintenance, and troubleshooting.
  • Security: Implement and monitor security measures for the protection of systems, networks, and information within the Office 365 suite.
  • Documentation: Maintain accurate documentation for system configurations, processes, and procedures relevant to Office 365 management.
  • End-User Training: Provide training and support to end-users on Office 365 capabilities and best practices.
  • Technical Support: Serve as the primary contact for Office 365-related technical issues, providing timely and effective resolution.
  • Compliance: Ensure all Office 365 activities comply with legal and company policies and procedures, maintaining operational security posture.


Requirements:



  • Bachelor's Degree and 4 or more years of related professional experience
  • Must be a US Citizen
  • Must posses a Secret Clearance or higher, or be able to obtain an Interim Secret Clearance
  • Minimum of 4 years of experience in Office 365 administration, including Exchange, OneDrive, and SharePoint.
  • Strong understanding of Microsoft Office 365 services and integration in a secure, classified environment.
  • Experience in user account management and Microsoft Exchange mail services.
  • Ability to troubleshoot and resolve technical problems promptly.
  • Knowledge of IT security best practices and familiarity with compliance regulations relevant to a classified environment.
  • Ability to meet with customers to gather and understand business requirements
  • Ability to quickly adapt to new situations and changing priorities
  • Ability to work under pressure, meet deadlines, and handle multiple projects simultaneously
  • Must be punctual, reliable, and accountable for themselves, with ability to follow through with tasks to completion


Desired Education & Experience:



  • Microsoft Office 365 certifications are highly desirable.
  • Experience working within classified government or military environments.
  • Familiarity with hybrid Exchange environments.


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 $115,000 - $138,000. 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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