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Senior Systems Administrator

A3T (Agil3 Technology Solutions)
Alexandria, VA Full Time
POSTED ON 11/18/2025 CLOSED ON 12/17/2025

What are the responsibilities and job description for the Senior Systems Administrator position at A3T (Agil3 Technology Solutions)?

The Senior Systems Administrator is responsible for managing and maintaining the IT infrastructure, ensuring the secure, reliable, and efficient operation of all systems. This role includes overseeing the deployment, configuration, and support of various systems, including servers, applications, and associated technologies. The Senior Systems Administrator will collaborate with other IT teams to support various projects and initiatives, provide technical expertise and ensure that IT systems are effectively integrated into the organization's strategic objectives.

Key Responsibilities

  • Managing, maintaining, and coordinating IT infrastructure, including servers, networks, and applications
  • Overseeing the deployment, configuration, and support of IT systems to ensure optimal performance and security leveraging vSphere, Cloud Service Providers, appliances, and other technologies
  • Managing Microsoft Servers and Azure Cloud Services across multiple availability zones and physical locations
  • Performing regular updates, backups, and troubleshooting to maintain system integrity and availability
  • Delivering unified role-based access across IT services
  • Collaborating with other IT teams to support various projects and initiatives, providing technical expertise
  • Developing and implementing IT policies and procedures to ensure compliance with industry standards and regulatory requirements
  • Participating in security and compliance assessments and audits
  • Continuously researching and evaluating new technologies and trends to recommend improvements and innovations
  • Providing technical leadership and guidance to junior staff, helping to develop their skills and knowledge
  • Ensuring the IT infrastructure is scalable, secure, and efficient, supporting both current and future needs
  • Developing and maintaining documentation for system configurations and procedures
  • Implementing and managing security measures to protect the IT infrastructure
  • Monitoring system performance and addressing any issues that arise
  • Leading PIOps’ IaC automation development
  • Participating in disaster recovery planning and testing to ensure system resilience
  • Act as a consultant to the organization by continuously researching and studying the latest trends and issues
  • Managing and maintaining M365 Conditional Access Policies

Minimum Qualifications

  • Education: Bachelor’s degree in computer science, information systems, engineering, or related field,
  • or equivalent experience.
  • Experience:
    • A minimum of five (5) years of experience leading IT systems administration, including experience leading or overseeing -level infrastructure.
    • Demonstrated expertise in the following tools and technologies:
      • PowerShell (e.g., MS Windows Server, Intune, Entra ID, Active Directory, and virtualization technologies).
      • Windows Task Manager (e.g., Cloud computing platforms such as Amazon Web Services, Microsoft Azure, or Google Cloud Platform).
      • JavaScript (e.g., scripting and automation tools).
      • Terraforms (e.g., diagnosing and resolving complex system and network issues)
      • Azure DevOps
      • Azure DevSecOps
Preferred certifications

  • Microsoft Certified: Azure Administrator
  • CompTIA Network
  • VMware Certified Professional

Other Requirements

  • Must pass background investigation
  • Must be a U.S. Citizen
  • Must be able to work on-site in the National Capital Region, with occasional travel

Company Overview

Agil3 Technology Solutions LLC ("A3T") is a Northern Virginia based, ISO 9001:2018, ISO 20000 & ISO 27001 Certified, 8a, Women-Owned (WOSB) and Service-disabled Veteran-Owned (SDVOSB) small business. A recent recipient of the prestigious Washington Technology TOP 50 (ranking #9, and on the list for last 4 years!), A3T is experiencing industry leading recognition and growth. In addition to the CEO’s recognition as an “All-Star Entrepreneur”, A3T is recognized by Inc Magazine as one of the fastest growing companies in the country, by Vet 50 as Fastest Growing Veteran-Owned Businesses, and is featured in CyberSecurity Ventures / Cybercrime Magazine! “As a go-to Women-Owned Cybersecurity company in US and internationally”. As part of our growth, we are looking for YOU to join our growing team.

A3T offers excellent benefits to enhance the work-life balance, including:

  • Medical Insurance
  • Dental Insurance
  • Vision Insurance
  • Life Insurance
  • Short Term & Long-Term Disability
  • 401k Retirement Savings Plan with Company Match
  • Paid Holidays
  • Paid Time Off (PTO)
  • Tuition and Professional Development Assistance
  • Parking/Travel Reimbursement (metropolitan areas)

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