Senior Systems Administrator III - Springfield, VA; Must have an

Senior Systems Administrator III - Generalist

Springfield, VA
Full-Time | On-site | Immediate Hire

Join Synertex and bring your expertise to a mission that matters. We're looking for a Senior Systems Administrator III - Generalist with a background in enterprise IT operations, server administration, and multi-platform environments to support critical national security initiatives. If you're passionate about maintaining secure, high-performance enterprise systems and thrive in a fast-paced, mission-driven role-this opportunity is for you.
RESPONSIBILITIES

• Provide Operations & Maintenance (O&M) support, including installation, configuration, hardening, testing, sustainment, remediation, upgrades, and decommissioning of enterprise server-based solutions.
• Support enterprise multi-platform environments (Microsoft, Linux/Unix, Citrix, etc.) across LAN, MAN, and WAN networks.
• Manage and administer enterprise server solutions including Citrix, Esri, McAfee, Microsoft, Red Hat, ServiceNow, and SolarWinds.
• Serve as an escalation tier for the Server O&M team, providing advanced troubleshooting and remediation.
• Produce and maintain technical documentation such as as-built diagrams, performance/capacity plans, SOPs, workflows, and run books.

REQUIREMENTS

• 7+ years of progressive experience providing O&M support for enterprise operating systems (Windows Server, RHEL, etc.), applications, and services (AD, Exchange, SharePoint, SQL, File Services, etc.).
• 5+ years of hands-on experience managing Microsoft Active Directory Domain/Forest Functional Level 2008 R2 or higher (DFL/FFL), including Domain Controllers, LDAP/S, DNS, and DHCP.
• 5+ years of experience operating in secure environments compliant with DISA SRGs/STIGs and U.S. Government IA/INFOSEC standards.
• Strong knowledge of Microsoft enterprise applications and services (Exchange, IIS, SQL, SharePoint, DFS, PKI, KMS).
• Familiarity with automation and scripting technologies (PowerShell, Bash, VBScript) for O&M tasks.
• Meets Cyber IT/Cybersecurity Workforce (CSWF) System Administrator (451) Intermediate Level requirements per SECNAV M-5239.2.
• Bachelor's degree from an accredited university OR one of the following certifications:
  • CompTIA Security+ CE
  • GIAC Security Essentials Certification (GSEC)
  • Systems Security Certified Practitioner (SSCP)
• Active DoD TS/SCI clearance with ability to obtain and maintain a Polygraph.

DESIRED QUALIFICATIONS

• Strongly desired: Microsoft Certified Solutions Associate (MCSA): Windows Server 2016 and GIAC GCWN. MCSE: Core Infrastructure is most desired.
• Technical certifications in other enterprise OSs, applications, and technologies (Citrix, Cisco, Microsoft, Red Hat, Splunk, SolarWinds).
• Experience with newer Microsoft enterprise technologies: Active Directory, Windows 10, Windows Server 2016, SQL Server 2016, IIS 10 (including Server Core).
• Experience implementing and maintaining High-Availability (HA) Server technologies: NLB, WFC, Exchange DAGs, IIS ARR Web Farms, SQL Always-On Availability Groups.
• Experience implementing, configuring, securing, and maintaining enterprise solutions aligned with vendor/industry INFOSEC standards, DISA SRG/STIG, IA compliance, cryptography (DARE, DIFE).
• Experience remediating INFOSEC vulnerabilities: receiving notices, researching solutions, presenting to customer, and implementing fixes within required timelines.
• Experience mentoring and providing On-the-Job Training (OJT) to junior staff.
• Working knowledge/experience with Microsoft SCCM: endpoint baselining, inventory, patching, software metering across global WANs. Experience with SCCM Collections, Applications, Deployment Packages, and Update Groups is a plus.
• Experience performing advanced troubleshooting to quickly assess, resolve, and restore systems while maintaining configuration integrity and INFOSEC posture.
• Experience with Microsoft AD Certificate Services (ADCS) providing PKI for server, client, encryption, code signing, and digital certificates.
• Experience with Microsoft Exchange in dispersed configurations (2010 or newer).
• Experience with Microsoft SharePoint (MOSS) and Outlook Web Apps (OWA) for enterprise collaboration.
• Broad working knowledge of the IT technology stack: physical, networking, storage, virtualization, servers, applications, and services.
• Familiarity with Windows Server Update Services (WSUS) in air-gapped environments.
• Familiarity with Microsoft DFS (DFS-N, DFS-R) for namespace and replication.
• Familiarity with Microsoft Volume Activation Services (ADBA, KMS).
• Familiarity with McAfee ePO, MOVE, and VSES for IA/INFOSEC endpoint protection.
• Familiarity with the SolarWinds Orion platform (NPM, NTA, NCM, IPAM, UDT, NTM, DPA, SAM, etc.) for enterprise monitoring.
• Experience providing O&M support in Virtual Desktop Infrastructure (VDI), ideally with Citrix Virtual Apps & Desktops.
• Familiarity with networking fundamentals: routing/switching, TCP/IP, traffic analysis, packet capture, and flow analysis.

Join a mission-driven team advancing enterprise IT and national defense capabilities. Apply today and become part of Synertex's legacy of innovation, leadership, and excellence.