ME-Senior Windows System Administrator

Momentum Engineering, Inc. fosters an employee-centric culture. Our strength lies in our people. With a high percentage of employees holding advanced degrees in engineering, computer science, and related disciplines, we bring deep technical expertise to every mission. Our team includes professionals with security clearances and full-scope polygraphs, ensuring trusted, secure support for the most sensitive national security initiatives. Additionally, our workforce is equipped with industry-leading certifications, demonstrating a commitment to continuous learning and excellence.

Most importantly, our exceptional employee retention rate reflects a culture of professional growth, mission focus, and dedication—ensuring long-term stability and expertise for our customers’ critical needs.

Job Summary

• Seeking a senior Windows System Administrator to join a high‑performing Agile team operating within the Scaled Agile Framework (SAFe) in support of a complex, fast‑paced program
• The selected candidate will provide daily systems administration and operations and maintenance support across multiple systems with a broad geographic footprint

Primary Responsibilities

• Maintaining multiple virtual server clusters and addressing system scan findings, vulnerability management patching, and Active Directory configuration issues
• Using enterprise monitoring tools to detect, assess, and respond to alerts
• Providing technical support to partner work groups on overlapping efforts while maintaining strong interdepartmental collaboration
• Managing Information Assurance Vulnerability Alerts (IAVAs) and system security scanning in accordance with applicable System Security Plans, ensuring vulnerabilities are identified and remediated quickly and accurately
• Initiating IAVA responses and system security scans, completing remediation actions, deploying patches and security updates to designated sites, and executing monthly security scans
• Identifying and resolving hardware and software problems
• Proactively notifying customers when test infrastructure delays may affect their ability to complete business functions on time and communicating system outages and publishing status updates to users, as needed
• Authoring and maintaining clear, accurate, and concise documentation
• Responding to calls and emails in a timely and professional manner
• Planning and implementing IT enhancements and supporting project‑related work
• Responding to system administration, operations, and maintenance issues on an on‑call basis when required

Required Qualifications

• Must have active Top Secret/SCI clearance with NSA Full Scope Polygraph
• Must have at least 7 years of Windows administration experience
• Must have at least 7 years of experience in information security management, with demonstrated expertise in security governance, risk management, compliance, and operational security functions
• Must have at least 5 years of experience with each of the following:
  • Implementing and managing Windows Active Directory and DNS environments
  • Creating and managing Group Policy Objects (GPOs)
  • Microsoft SCCM
  • Microsoft Exchange administration and Exchange Management Shell
• Must have experience with Windows Command Line, Power Shell, and Power Shell scripting
• Strong understanding of advanced security protocols, standards, and information security principles is a must
• Experience with software and security architectures
• Hands‑on experience with IAVA management
• Hands‑on experience supporting users, optimizing system operations, and monitoring enterprise IT systems
• Commitment to best practices, including compliance with maintenance windows and change control procedures
• Familiarity with Windows and Linux operating systems, VMware, and networking technologies including switches, routers,…