Senior Systems Engineer

Amentum•Columbia, MD

20d•Onsite

About The Position

The Senior Systems Engineer is a technical contributor responsible for implementing, administering, maintaining, and improving enterprise infrastructure services across multiple classified environments. The role supports compute, storage, networking, virtualization, and identity management platforms, and works collaboratively with engineering and cybersecurity teams to sustain complex operational environments and mission-critical customer operations. The position contributes to infrastructure design and modernization, lifecycle management, system maintenance, troubleshooting, cybersecurity compliance, and technical documentation. It also provides technical guidance to junior and mid-level engineers and supports planned after-hours maintenance windows and operational incidents as needed. The position is full-time and onsite, with a schedule of eight hours per day, five days per week, and occasional after-hours work for system maintenance. A TS/SCI security clearance is required.

Requirements

At least 8 years of experience designing, implementing, and supporting enterprise infrastructure environments, including compute, storage, networking, virtualization, and identity management.
Strong experience administering Cisco UCS, including 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, including LAN/WAN technologies, routing, switching, network segmentation, and security best practices.
Experience implementing and supporting infrastructure solutions in 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, including patch management, system hardening, performance tuning, and lifecycle management.
Experience supporting infrastructure 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, including identifying root causes and resolving 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 and ability to collaborate across technical and non-technical teams.
High school diploma or equivalent.
Active TS/SCI security clearance.
At least one IAT-required certification: CISM, CISSP, or an equivalent senior-level baseline certification.
At least one relevant vendor certification, such as Microsoft, VMware, Cisco, NetApp, Pure Storage, HP, Dell, Linux+, Red Hat, HBSS, or ACAS. Candidates without an active certification must obtain at least one within six months of hire.

Nice To Haves

Bachelor's degree in Information Technology, Computer Science, Engineering, or a related field.
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.

Responsibilities

Design, implement, administer, and maintain enterprise infrastructure systems, including Cisco UCS, Microsoft Active Directory, enterprise storage platforms, Windows Server environments, and network infrastructure.
Support deployment and administration of network solutions, including routing, switching, segmentation, and secure communications across classified environments.
Assist in developing and maintaining infrastructure standards, engineering best practices, and system documentation.
Participate in infrastructure modernization, technology refreshes, 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, maintenance, and approved production changes.
Troubleshoot complex infrastructure issues, perform root cause analysis, and implement corrective actions to improve availability and performance.
Work with cybersecurity personnel on vulnerability remediation, STIG implementation, system hardening, and compliance requirements.
Evaluate technologies, tools, and system enhancements and recommend operational improvements.
Develop and maintain technical documentation, 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.
Fulfill applicable safety, quality, procedure-compliance, training, and self-aid/buddy-aid responsibilities.