Senior Systems Engineer / Technical Lead

SteelGate LLC; Virginia, Northern (MN, KY); Hybrid; USD 110,000 - 150,000; Full time

Benefits offered by this job

401(k) matching

Health insurance

Dental insurance

Vision insurance

Paid time off

Professional development

Job summary

SteelGate LLC is seeking a Senior Systems Engineer / Technical Lead to provide enterprise-level IT systems engineering for a U.S. Government environment at Quantico, VA.

This full-time role requires a DoD Secret clearance and expertise across Windows Server, AD, DNS/DHCP, PKI, and cloud/virtualization technologies including VMware vSphere and Microsoft 365. The candidate will design, configure, monitor, secure, and sustain enterprise infrastructure, perform advanced troubleshooting, and develop

Qualifications

• 8+ years of IT systems engineering, systems administration, or enterprise infrastructure experience.
• Active DoD Secret security clearance.
• Experience with Windows Server, AD, DNS/DHCP/LDAP/LDAPS, PKI, and enterprise identity services.
• Experience with VMware vSphere/ESXi and Microsoft 365.
• Familiarity with DISA STIGs and IAVA/IAVM requirements.

Responsibilities

• Configure, monitor, troubleshoot, and secure enterprise networks and systems.
• Lead Tier III engineering support and incident analysis.
• Develop SOPs, architecture diagrams, and runbooks.
• Plan upgrades, migrations, and performance optimization.
• Coordinate with Cybersecurity, RMF/ATO, and cross‑functional teams.

Skills

Windows Server

Active Directory

DNS/DHCP/LDAP/LDAPS

VMware vSphere/ESXi

Microsoft 365

Azure/microsoft cloud

Security hardening/DISA STIGs

PowerShell scripting

DoD/Federal IT

Technical documentation

Education

Bachelor’s degree in Computer Science or related field

Microsoft certification (e.g., Windows Server/Azure)

CISSP/Security+ or equivalent

Tools

VMware vSphere/ESXi

PowerShell

ServiceNow

Microsoft System Center

Azure/AWS cloud tooling

DISA IAVA/IAVM tooling

Job description

# Senior Systems Engineer / Technical Lead# Senior Systems Engineer / Technical LeadLocationQuantico, Virginia### Description**Senior Systems Engineer / Technical Lead****Full Time | Quantico, VA | Secret Clearance Required**SteelGate is seeking an experienced Senior Systems Engineer to provide enterprise-level systems engineering and technical support for the U.S. Government environment. The Senior Systems Engineer will serve as a senior technical resource responsible for the design, configuration, administration, monitoring, troubleshooting, security, optimization, and sustainment of enterprise IT systems and services.The customer environment includes on-premises infrastructure, Microsoft Azure IL2 cloud services, Microsoft 365, virtualized infrastructure, data centers, enterprise networks, applications, and end-user services. The successful candidate will provide Tier III engineering and technical escalation support while working closely with Systems Administrators, Network Engineers, Cloud Engineers, Cybersecurity personnel, and Technical Support staff.Key Responsibilities- Configure, manage, monitor, troubleshoot, document, and secure enterprise network and systems services, including DNS, DHCP, NTP, SNMP, HTTP/HTTPS, SSH, LDAP/LDAPS, and SMTP.- Engineer, administer, maintain, and sustain Microsoft-based enterprise infrastructure and associated services.- Support physical and virtual server environments and associated enterprise applications.- Support Microsoft 365 services and their integration with the customer enterprise environment.- Support virtualized infrastructure, including VMware and virtual desktop technologies.- Monitor system availability, performance, capacity, reliability, and security and proactively identify potential service degradation.- Perform advanced troubleshooting and root-cause analysis for complex server, application, infrastructure, and service issues.- Implement operating system, server, application, and network-service patches and updates in accordance with applicable IAVA, IAVB, IAVM, operational directives, and cybersecurity requirements.- Develop and maintain system configurations, engineering documentation, architecture diagrams, Standard Operating Procedures (SOPs), technical procedures, and other system documentation.- Develop and maintain backup, restoration, continuity, and disaster-recovery strategies for supported systems.- Support data-center and cloud infrastructure performance, availability, and capacity requirements.- Evaluate system lifecycle status and provide recommendations concerning End-of-Life (EOL), End-of-Support (EOS), modernization, and technology refresh.- Plan and support system upgrades, migrations, integrations, and technology-refresh activities.- Validate proposed technical solutions and system designs before implementation.- Troubleshoot connectivity and integration issues involving servers, applications, cloud resources, network services, and enterprise infrastructure.- Support configuration and change-management processes and ensure technical changes are properly documented.- Provide Tier III escalation support to Systems Administrators and Technical Support personnel.- Participate in incident, problem, and root-cause analysis and develop corrective actions for recurring technical problems.- Develop After Action Reports (AARs), technical findings, lessons learned, and recommendations following significant incidents or system changes.- Coordinate with Network Engineering, Cloud Engineering, Cybersecurity, RMF/ATO, Knowledge Management, and Technical Support teams.- Provide technical guidance and mentorship to junior and mid-level systems personnel.Minimum Experience:- Must have 8+ years of progressively responsible IT systems engineering, systems administration, or enterprise infrastructure experience.- Must have an active DoD Secret security clearance.- Must meet applicable DoD 8140 / DCWF requirements for Work Role 451 at the Advanced proficiency level.- Demonstrated experience supporting complex DoD, Federal Government, or comparable enterprise IT environments.- Advanced experience with Microsoft Windows Server environments.- Strong knowledge of Active Directory, Group Policy, DNS, DHCP, LDAP/LDAPS, PKI, and enterprise identity/access services.- Experience administering and troubleshooting Microsoft 365 enterprise services.- Experience with virtualization technologies such as VMware vSphere/ESXi.- Experience supporting physical and virtual server environments.- Experience with enterprise backup, restoration, disaster recovery, and business-continuity technologies.- Experience performing server and application patching and vulnerability remediation.- Working knowledge of DISA STIGs, IAVM/IAVA requirements, cybersecurity hardening, and DoD configuration-management practices.- Experience with enterprise monitoring, performance analysis, capacity management, and troubleshooting tools.- Ability to diagnose complex technical problems spanning servers, applications, network services, virtualization, storage, and cloud infrastructure.- Demonstrated ability to develop technical documentation, SOPs, architecture diagrams, engineering plans, and troubleshooting procedures.- Strong written and verbal communication skills and the ability to communicate technical information effectively to both technical and nontechnical stakeholders.Preferred Qualifications:- Bachelor's degree in Computer Science, Information Technology, Engineering, Cybersecurity, or related technical discipline.- Microsoft role-based certification relevant to Windows Server, Azure, or Microsoft 365.- VMware VCP or equivalent virtualization certification.- CompTIA Security+, CySA+, CASP+/SecurityX, CISSP, or comparable certification.- ITIL Foundation or experience working in an ITIL-based service-management environment.- Experience with ServiceNow or comparable enterprise ITSM/ticketing systems.- Experience supporting Azure/hybrid-cloud environments.- Experience with PowerShell and other administrative scripting/automation technologies.- Previous USMC, Navy, DISA, or DoD enterprise IT experience.- Experience operating within geographically dispersed enterprise environments.Job Types: Full-TimeSalary: Based on experienceSchedule: Monday-FridayBenefits:- 401(k) matching- Dental insurance- Health insurance- Paid time off- Professional development assistance- Vision insuranceSTEELGATE LLC is a Service-Disabled, Veteran-Owned Small Business (SDVOSB) that prides itself in hiring top-level Subject Matter Experts (SME's) proven to exceed deliverable expectations. STEELGATE LLC is focused on solving the hard problems facing our government and commercial clients. Our success lies in blending together relevant domain/functional knowledge with deep expertise in Information Technology, Cybersecurity, Defensive Cyber Operations, cloud-based DevSecOps, Data Analytics & AI, Acquisition and Acquisition Management, and more. STEELGATE LLC has a positive, inclusive workplace environment where all team members and partners work towards mutual success. We have established a reliable reach-back program whereas all SMEs are available to support, advise and directly complete mission deliverables when necessary. STEELGATE LLC has a worldwide reputation as a valued and trustworthy partner. Our can-do attitude and willingness to support any mission requirement sets us apart from other small business organizations. Find out more about STEELGATE LLC @ www.steelgatellc.com.We are an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, or any other characteristic protected by law.