Job description

Purpose and Impact: In support of a challenging, critical, and rewarding program that provides integrated voice, video, and data services throughout the Information Technology lifecycle, Amentum is seeking a Staff System Administrator to join our dynamic team of IT professionals dedicated to fostering a positive and collaborative work environment. You must be a critical thinker, have a strong work ethic, and be able to work independently or as a member of a team in a dynamic environment. We value candidates who are detail-oriented while also being able to think and react quickly to emerging and unique problem sets. To be successful, you must be able to rapidly adapt and learn how to operate the front and back end of new products and processes. Work Schedule: 5 Days (Mon – Fri); 8 hrs/Day; 40 hrs/wkly Essential Responsibilities: The duties and responsibilities of the Staff System Administrator include, but are not limited to the following: Administer and maintain Windows server environments, including Active Directory, DNS, DHCP, and Group Policy Manage and support virtualization platforms such as VMware and/or Hyper-V Monitor system performance, review security logs, and apply critical updates and patches Implement robust backup strategies and disaster recover solutions Ensure systems comply with organizational policies and security standards Manage IP address allocation, subnetting, and VLAN configurations Collaborate with network engineers to diagnose and resolve LAN, WAN, and Wi-Fi connectivity issues Monitor critical network services like DNS and DHCP to ensure consistent system functionality Assist in reviewing firewall rules to support secure access to Windows servers Contribute to the planning and deployment of VPNs, remote access solutions, and network segmentation strategies Troubleshoot shared infrastructure issues, including domain name resolution and authentication failures Serve as a primary point of contact for customer issues by diagnosing, resolving, and tracking problems. Manage and maintain customer accounts, including establishment, updates, and repairs, while identifying opportunities to improve customer service processes. Provide responsive, multi-channel support (via email, phone, and remote access) to end-users, delivering timely troubleshooting and problem resolution. Ensure high-quality customer experience through consistent and effective communication. Respond to service requests and oversee the lifecycle tracking, documentation, and reporting of network systems and hardware assets. Ensure compliance with disposal protocols, including the secure destruction of sensitive materials. Utilize industry-standard tools to deliver remote support for desktop and peripheral devices, efficiently resolving technical issues while minimizing system downtime Maintain accurate records of technical incidents and service requests, escalating complex or unresolved issues according to established escalation procedures and organizational policies Administer enterprise software deployments using tools such as Microsoft Endpoint Configuration Manager (MECM), ensuring streamlined, secure, and automated application rollouts across all relevant systems Provide training and guidance to end-users to enhance technology adoption and efficiency. Regularly communicate key updates, insights, and technical recommendations to senior leadership to support informed decision-making Continuously research and evaluate emerging technologies, tools, and best practices to maintain current expertise and ensure the organization benefits from up-to-date knowledge in relevant IT domains Actively participate in cross-functional and special projects, bringing technical insight and operational support to ensure successful outcomes aligned with organizational objectives Minimum Requirements (Knowledge, Skills, and Abilities): Must have active Top-Secret clearance with SCI or TS with the ability to acquire SCI  Minimum 4 years of relevant Information Technology Experience   Proven independence in executing projects aligned with executive directives Demonstrated experience administering enterprise software deployments using tools such as Microsoft Endpoint Configuration Manager (MECM) Possesses hands-on experience with enterprise technologies, including Windows Server 2019, Citrix Virtual Desktop, VMware ESXi, Active Directory, DHCP, and Service Accounts Strong command of Group Policy for centralized management of user and computer settings across the domain Skilled in using PowerShell to automate administrative tasks and enhance system management efficiency Hands-on experience in VMware (vCenter, vSAN) and Nutanix Hyperconverged Infrastructure, including architecture, deployment, and the use of integrated management tools for efficient data center operations Solid understanding of networking principles, protocols, and configuration best practices to ensure secure, reliable, and high-performing IT environments Demonstrated experience implementing and managing data protection strategies and disaster recovery solutions to ensure business continuity and data integrity Proven track record of identifying and recommending technology solutions that enhance customer satisfaction, support mission objectives, and drive operational improvements Must be able to work a 40-hour work week, normally Monday through Friday Ability to work overtime during critical peaks and be available to meet last-minute requests for overtime if needed Ability to travel (25-40%) inside the continental United States Familiarity with MS Office applications such as Excel, Word, Outlook, SharePoint, Project and Visio Exceptional attention to detail; excellent verbal and written communication skills; strong critical thinking, organizational, time-management, and problem-solving skills Ability to work both independently and as part of a team in a dynamic environment Security Clearance Required: Must have active Top-Secret clearance with SCI or TS with the ability to acquire SCI Minimum Education: High School Diploma Minimum Years of Experience: 4 years of relevant experience Required Certifications: Must possess or be able to obtain one of the following 8140 IAT Level II or III baseline certifications before start date: Level II certs include – CCNA Security, GISCP, GSEC, Security CE, SSCP Level III certs include – CASP CE, CCNP Security, CISA, CISSP (or Associate), GCED, GCIH Preferred Qualifications: Bachelor’s degree in IT related field 4 – 8 years of relevant experience ITIL v4 Certification ServiceNow experience Experience with installation and configuration of enterprise network and systems infrastructure devices, cabling, and operational best practices Understanding of Active Directory, MECM, DHCP, DNS, Cisco IOS, SolarWinds, and Remedy undefined #javelin #jointhepack #servicenow #mecm # #activedirectory #solarwinds #systemadmin This position is not designated as a safety sensitive position. As part of our commitment to maintaining a safe and compliant work environment, Amentum is a drug-free workplace and requires all personnel to comply with company drug and alcohol policies as a condition of employment. Employment is contingent upon successful completion of the drug screening process. Please note that this may include pre-hire screening for marijuana, as well as other federally controlled substances due to Amentum’s role as a federal contractor and trusted partner to the US Government. Other Responsibilities: Safety - Amentum enforces a safety culture whereby all employees have the responsibility for continuously developing and maintaining a safe work environment. As appropriate, each employee is responsible for completing all training requirements and fulfilling all self-aid/buddy aid responsibilities, participating in emergency response tasks and serving on safety committees and teams. Quality - Quality is the foundation for the management of our business and the keystone to our goal of customer satisfaction. It is our policy to consistently provide services that meet customer expectations. Accordingly, each employee must conform to the Amentum Quality Policy and carry out job activities in compliance with applicable Amentum Quality System documents and customer contracts. Each employee must read and understand his/her Quality Management and Customer Satisfaction responsibilities. Procedure Compliance - Each employee must read, understand and implement the general and specific operational, safety, quality and environmental requirements of all plans, procedures and policies pertaining to his/her job. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status. Compensation Details: $125,000 - $150,000 The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws. Benefits Overview: Our health and welfare benefits are designed to support you and your priorities. Offerings include: Health, dental, and vision insurance Paid time off and holidays Retirement benefits (including 401(k) matching) Educational reimbursement Parental leave Employee stock purchase plan Tax-saving options Disability and life insurance Pet insurance Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits. Original Posting: 09/29/2026 - Until Filled Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs. Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters .

Requirements

Must-haves

Work Schedule: 5 Days (Mon – Fri); 8 hrs/Day; 40 hrs/wkly
The duties and responsibilities of the Staff System Administrator include, but are not limited to the following:
Administer and maintain Windows server environments, including Active Directory, DNS, DHCP, and Group Policy
Manage and support virtualization platforms such as VMware and/or Hyper-V
Monitor system performance, review security logs, and apply critical updates and patches
Implement robust backup strategies and disaster recover solutions
Ensure systems comply with organizational policies and security standards
Manage IP address allocation, subnetting, and VLAN configurations
Collaborate with network engineers to diagnose and resolve LAN, WAN, and Wi-Fi connectivity issues
Monitor critical network services like DNS and DHCP to ensure consistent system functionality
Assist in reviewing firewall rules to support secure access to Windows servers
Contribute to the planning and deployment of VPNs, remote access solutions, and network segmentation strategies
Troubleshoot shared infrastructure issues, including domain name resolution and authentication failures
Utilize industry-standard tools to deliver remote support for desktop and peripheral devices, efficiently resolving technical issues while minimizing system downtime
Maintain accurate records of technical incidents and service requests, escalating complex or unresolved issues according to established escalation procedures and organizational policies
Administer enterprise software deployments using tools such as Microsoft Endpoint Configuration Manager (MECM), ensuring streamlined, secure, and automated application rollouts across all relevant systems
Continuously research and evaluate emerging technologies, tools, and best practices to maintain current expertise and ensure the organization benefits from up-to-date knowledge in relevant IT domains

Nice-to-haves

Bachelor’s degree in IT related field
ITIL v4 Certification
ServiceNow experience
Experience with installation and configuration of enterprise network and systems infrastructure devices, cabling, and operational best practices
Understanding of Active Directory, MECM, DHCP, DNS, Cisco IOS, SolarWinds, and Remedy
#javelin #jointhepack #servicenow #mecm # #activedirectory #solarwinds #systemadmin
This position is not designated as a safety sensitive position.

Application prep

Use the role’s language and application details while tailoring your materials.

Keywords to mirror

react

Platform: workday
Effort: long

Benefits

Benefits detected in the listing.

Dental

Vision

401(K)

Paid Time Off

Parental Leave