Windows Systems Administrator

There is a production line behind this Windows estate, and people at the end of it waiting on a notice they can actually read.

Sienna Systems is seeking an experienced Windows Systems Administrator to join our Social Security Administration Special Notice Option (SNO) team in Alexandria, Virginia.

SNO is how SSA delivers notices to beneficiaries who need them in an alternate format — Braille, large print, audio, and data files. The Windows environment you administer is what keeps that production line running, and it is watched: this is a 24x7 production environment supporting people who depend on those notices arriving.

You will own the Windows server estate — builds, patching, backups, monitoring, and recovery — working on-site with the government technical team. Small team, so the work is broad and the ownership is real.

Why You'll Want This Role:

• $112,500 – $117,500 based on experience
• On-site in Alexandria, Virginia — easy commute from the DC metro, no relocation needed if you are already local
• Established SSA program with a defined mission and a stable government customer
• 401(k) with 4% matching, immediate vesting, no restrictions
• 3 weeks Paid Time Off plus 11 Federal Holidays
• Full ownership of the Windows estate rather than one slice of a large enterprise team

Key Responsibilities:

• Install, rebuild, and configure Windows servers including hardware, peripherals, services, directories, and storage to program and operational standards.
• Perform daily system monitoring: verify the integrity and availability of hardware, server resources, and key processes; review system and application logs; confirm scheduled jobs completed.
• Run daily backup operations and manage the backup solution, verifying restores, managing media rotation and off-site handling, and performing file archival and purges.
• Apply operating system and application security patches and upgrades on a regular cadence, coordinating with the information assurance team for validation and verification.
• Remediate Plan of Action and Milestones (POA&M) security findings.
• Provide Tier II and Tier III support for complex issues; troubleshoot, repair, and recover from hardware and software failures, keeping affected users and management informed.
• Create, modify, and remove user accounts on request.
• Manage and maintain virtualized environments and perform performance tuning and resource optimization across CPU, memory, and disk.
• Submit change requests to the configuration manager and ensure all system changes are documented.
• Develop and maintain installation, configuration, and operational procedures, and contribute to system standards.
• Write scripts to automate administration tasks and produce periodic performance reporting to support capacity planning.

Required Qualifications:

• Able to obtain and maintain a Public Trust suitability determination
• At least 6 years of systems administration experience
• Extensive Windows Server experience
• Experience maintaining SCCM and using Microsoft ADS/SMS/SUS/SCCM for software distribution and patch management
• Experience managing VMware ESX/ESXi
• Experience working with IIS and SQL Server
• Experience supporting large internet-facing applications
• Strong understanding of TCP/IP and other networking principles
• Strong customer support skills
• Proven effective written and verbal communication, teaming, and interpersonal skills
• Ability to work on multiple tasks at once in a dynamic, fast-paced, team-oriented environment and prioritize effectively

Preferred Qualifications:

• Prior federal or SSA program experience
• Microsoft, VMware, ITIL, or Security+ certification
• Experience with SharePoint, PKI infrastructure, single sign-on, smart card services, or DFS replication
• Experience supporting cloud migrations and cloud computing services
• Familiarity with Section 508 accessibility standards

Salary: $112,500 – $117,500 based on experience

Job location: Alexandria, Virginia

Company Benefits:

• Medical/dental/vision insurance
• 401(k) plan: 4% matching, immediate vesting, no restrictions
• 3 weeks Paid Time Off (PTO)
• 11 Federal Holidays
• Long- and short-term Disability coverage
• Company-sponsored Life Insurance coverage
• Hiring Referral Bonus

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