Sr. Infrastructure Engineer

Purpose and Impact:

Come be a part of an exciting and ever-changing program that provides a comprehensive range of state-of-the-art solutions and hands-on assistance in designing, implementing, managing, and sustaining operations across various network environments in Columbia, MD for our customer.

We provide an environment that fosters and supports innovation and valuing "outside-the-box" thinking to solve complex problems. There are several training opportunities for team members that want to learn new technologies and stay current with their technical skillset. We are a highly technical group and nurture growth, with a technical culture of cross-trained teammates with opportunities to develop additional skillsets.

Work Schedule: 8hrs / day, 5 days per week, all onsite. Occasional after hours work for system maintenance.

Essential Responsibilities:

The Senior Infrastructure Engineer serves as the technical lead for the organization's enterprise infrastructure, responsible for the architecture, implementation, operation, and continuous improvement of compute, storage, network, virtualization, and identity management platforms. This position provides strategic and operational leadership for critical infrastructure services across a variety of classified networks, establishes engineering standards, drives modernization initiatives, and ensures the reliability, security, and scalability of systems supporting customer operations. The role requires extensive hands-on technical expertise, cross-functional collaboration, and the ability to lead complex projects and maintenance activities in a secure enterprise environment.

Responsibilities include:

• Design, implement, administer, and maintain enterprise infrastructure systems including Cisco UCS, Microsoft Active Directory, enterprise storage platforms, Windows Server environments, and core network infrastructure.

• Architect, deploy, and support network solutions including routing, switching, segmentation, and secure communications across multiple classified environments.

• Develop and maintain infrastructure standards, engineering best practices, system baselines, and technical roadmaps.

• Lead infrastructure modernization efforts, technology refresh projects, migrations, and lifecycle management activities.

• Manage enterprise storage solutions, data protection strategies, backups, disaster recovery capabilities, and capacity planning initiatives.

• Administer enterprise identity and authentication services including Active Directory, Group Policy, DNS, DHCP, and file services.

• Plan and execute system upgrades, firmware updates, patches, maintenance activities, and change management procedures.

• Troubleshoot complex infrastructure issues, perform root cause analysis, and implement corrective actions to improve operational stability and performance.

• Collaborate with cybersecurity personnel to ensure compliance with security requirements, vulnerability remediation efforts, STIG implementation, and system hardening activities.

• Evaluate emerging technologies and provide technical recommendations for infrastructure improvements and future-state architectures.

• Develop and maintain technical documentation including architectures, diagrams, procedures, standards, and operational runbooks.

• Provide senior-level technical guidance and mentoring to infrastructure personnel and serve as an escalation point for complex technical issues.

• Support planned after-hours maintenance windows and emergency response efforts to maintain system availability and operational readiness.

Work Environment, Physical Demands, and Mental Demands: Standard working environment

Minimum Requirements (Knowledge, Skills, and Abilities):

• 10+ years of progressive experience designing, implementing, and supporting enterprise-scale infrastructure environments, including compute, storage, networking, virtualization, and identity services.

• Expert-level knowledge of Cisco UCS infrastructure, including architecture, administration, lifecycle management, firmware maintenance, capacity planning, and performance optimization in highly available enterprise environments.

• Strong experience with enterprise virtualization platforms, including VMware vSphere, ESXi, vCenter, Hyper-V, Nutanix, or equivalent technologies supporting mission-critical workloads.

• Advanced experience designing, implementing, and maintaining enterprise network infrastructure , including LAN/WAN, routing, switching, segmentation, and network security best practices.

• Demonstrated ability to architect and establish enterprise infrastructure standards , develop technical roadmaps, evaluate emerging technologies, and lead infrastructure modernization initiatives aligned with business objectives.

• Extensive hands-on experience administering Microsoft Active Directory , Group Policy, DNS, DHCP, file services, authentication systems, and enterprise identity management solutions.

• Strong experience managing enterprise storage platforms , including SAN, NAS, backup, disaster recovery, replication, capacity planning, and data protection strategies.

• Advanced understanding of Windows server operating systems , including system hardening, patch management, performance tuning, automation, and lifecycle management.

• Experience leading infrastructure maintenance and operational activities within production environments, including change management, patching, upgrades, disaster recovery testing, and after-hours maintenance windows.

• Demonstrated ability to lead complex technical projects from design through implementation, collaborating across technical teams, vendors, and stakeholders to ensure successful delivery and operational readiness.

• Expert troubleshooting and problem-solving skills , with the ability to perform root cause analysis, resolve critical infrastructure issues, and develop long-term corrective actions for enterprise systems.

• Strong knowledge of cybersecurity principles and infrastructure security practices , including vulnerability remediation, system hardening, access controls, compliance requirements, and secure infrastructure design.

• Experience developing technical documentation, operational procedures, infrastructure standards, and architectural diagrams to support enterprise governance and knowledge management.

• Proven ability to serve as a senior technical leader and mentor , providing guidance to engineers, establishing best practices, and driving continuous improvement across infrastructure operations.

Security Clearance Required:

• TS / SCI

Minimum Education:

• High School Diploma or equivalent

Minimum Years of Experience:

• 10+years of progressive experience designing, implementing, and supporting enterprise-scale infrastructure environments, including compute, storage, networking, virtualization, and identity services.

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 VMware, Hyper-V, Nutanix, or other enterprise virtualization platforms.

• 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:

$160,000 - $200,000

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:

07/23/2026 - 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 ( .