Job description

Purpose and Impact: Come be part of a dynamic program that delivers enterprise infrastructure, systems engineering, and operational support across multiple mission-critical network environments. Our team designs, implements, and sustains modern technology solutions supporting real-world customer operations. We foster a highly collaborative and technical culture that values innovation, continuous learning, and professional growth. Team members are encouraged to expand their expertise through training opportunities, cross-functional collaboration, and hands-on experience with a wide range of technologies supporting complex operational environments. Work Schedule: 8hrs / day, 5 days per week, full-time onsite position Occasional after hours work for system maintenance Essential Responsibilities: The Senior Systems Engineer serves as a senior technical contributor responsible for the implementation, administration, maintenance, and improvement of enterprise infrastructure services. This position supports compute, storage, networking, virtualization, and identity management platforms across a variety of classified environments. The role requires strong technical expertise, collaboration across engineering and cybersecurity teams, and the ability to independently support complex infrastructure projects and operational activities. Responsibilities include: Design, implement, administer, and maintain enterprise infrastructure systems including Cisco UCS, Microsoft Active Directory, enterprise storage platforms, Windows Server environments, and network infrastructure. Support the deployment and administration of network solutions including routing, switching, segmentation, and secure communications across multiple classified environments. Assist with the development and maintenance of infrastructure standards, engineering best practices, and system documentation. Participate in infrastructure modernization efforts, technology refresh projects, migrations, and lifecycle management activities. Administer enterprise storage platforms and support backup, disaster recovery, replication, and capacity planning initiatives. Manage enterprise identity and authentication services including Active Directory, Group Policy, DNS, DHCP, and file services. Plan and execute system upgrades, firmware updates, patching activities, maintenance actions, and approved changes within production environments. Troubleshoot complex infrastructure issues, perform root cause analysis, and implement corrective actions to improve system availability and performance. Work closely with cybersecurity personnel to support vulnerability remediation, STIG implementation, system hardening, and compliance requirements. Evaluate technologies, tools, and system enhancements and provide recommendations for operational improvements. Develop and maintain technical documentation including procedures, diagrams, system configurations, and operational runbooks. Provide technical guidance and mentoring to junior and mid-level engineers. Support planned after-hours maintenance windows and respond to operational incidents as required to maintain system availability. Work Environment, Physical Demands, and Mental Demands: Standard working environment Minimum Requirements (Knowledge, Skills, and Abilities): 8 years of experience designing, implementing, and supporting enterprise infrastructure environments including compute, storage, networking, virtualization, and identity management services. Strong experience with Cisco UCS administration, lifecycle management, firmware maintenance, capacity planning, and operational support. Experience administering enterprise virtualization platforms such as VMware vSphere, ESXi, vCenter, Hyper-V, Nutanix, or equivalent technologies. Strong understanding of enterprise networking concepts including LAN/WAN technologies, routing, switching, network segmentation, and security best practices. Experience implementing and supporting infrastructure solutions within complex enterprise environments. Hands-on experience administering Microsoft Active Directory, Group Policy, DNS, DHCP, file services, and authentication technologies. Experience managing enterprise storage platforms, backup solutions, disaster recovery capabilities, and data protection strategies. Strong knowledge of Windows Server operating systems including patch management, system hardening, performance tuning, and lifecycle management. Experience supporting infrastructure maintenance activities including upgrades, migrations, patching, change management, and disaster recovery exercises. Ability to lead technical tasks and infrastructure projects while coordinating with engineering teams, stakeholders, and vendors. Strong troubleshooting and analytical skills with the ability to identify root causes and resolve complex technical issues. Knowledge of cybersecurity principles including vulnerability remediation, access controls, compliance requirements, and secure infrastructure practices. Experience with infrastructure automation and scripting using PowerShell, Python, Ansible, or similar technologies. Experience developing and maintaining technical documentation, procedures, diagrams, and operational guides. Excellent verbal and written communication skills with the ability to collaborate effectively across technical and non-technical teams. Security Clearance Required: TS / SCI Minimum Education: High School Diploma or equivalent Preferred: Bachelor s Degree in Information Technology, Computer Science, Engineering, or related field Minimum Years of Experience: 8 Required Certifications: This is an IAT3 level billet. Applicant must have: Required IAT Certs: one or more of the following: CISM, CISSP, or equivalent senior-level baseline certification Required vendor certification in one or more relevant technologies (e.g., Microsoft, VMware, Cisco, NetApp, Pure Storage, HP, Dell, Linux , Red Hat, HBSS, ACAS). Candidates without an active certification must obtain at least one within 6 months of hire Preferred Qualifications: Bachelors Degree Experience supporting Federal Government, DoD, or regulated environments. Experience with NIST RMF, NIST 800-53, STIGs, CIS Benchmarks, or equivalent compliance frameworks. Experience with enterprise backup, disaster recovery, and business continuity solutions. Prior Military experience #javelin 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: $140,000- $190,000 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: 10/12/2026 - 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

8hrs / day, 5 days per week, full-time onsite position
Occasional after hours work for system maintenance
Design, implement, administer, and maintain enterprise infrastructure systems including Cisco UCS, Microsoft Active Directory, enterprise storage platforms, Windows Server environments, and network infrastructure.
Support the deployment and administration of network solutions including routing, switching, segmentation, and secure communications across multiple classified environments.
Assist with the development and maintenance of infrastructure standards, engineering best practices, and system documentation.
Participate in infrastructure modernization efforts, technology refresh projects, migrations, and lifecycle management activities.
Administer enterprise storage platforms and support backup, disaster recovery, replication, and capacity planning initiatives.
Manage enterprise identity and authentication services including Active Directory, Group Policy, DNS, DHCP, and file services.
Plan and execute system upgrades, firmware updates, patching activities, maintenance actions, and approved changes within production environments.
Troubleshoot complex infrastructure issues, perform root cause analysis, and implement corrective actions to improve system availability and performance.
Work closely with cybersecurity personnel to support vulnerability remediation, STIG implementation, system hardening, and compliance requirements.
Evaluate technologies, tools, and system enhancements and provide recommendations for operational improvements.
Develop and maintain technical documentation including procedures, diagrams, system configurations, and operational runbooks.
Provide technical guidance and mentoring to junior and mid-level engineers.
Support planned after-hours maintenance windows and respond to operational incidents as required to maintain system availability.
Work Environment, Physical Demands, and Mental Demands: Standard working environment
Minimum Requirements (Knowledge, Skills, and Abilities):

Nice-to-haves

Bachelor s Degree in Information Technology, Computer Science, Engineering, or related field
Bachelors Degree
Experience supporting Federal Government, DoD, or regulated environments.
Experience with NIST RMF, NIST 800-53, STIGs, CIS Benchmarks, or equivalent compliance frameworks.
Experience with enterprise backup, disaster recovery, and business continuity solutions.
Prior Military experience
This position is not designated as a safety sensitive position.

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Keywords to mirror

python

Platform: workday
Effort: long

Benefits

Benefits detected in the listing.

Dental

Vision

401(K)

Paid Time Off

Parental Leave