Windows Systems Administrator

Sienna Systems Corporation; Alexandria (VA); On-site; USD 113,000 - 118,000; Full time

Benefits offered by this job

401(k) matching

Paid Time Off

Federal Holidays

On-site

Job summary

Sienna Systems Corporation seeks an experienced Windows Systems Administrator to join the SSA Special Notice Option (SNO) team in Alexandria, Virginia. You will own the Windows server estate, including builds, patching, backups, monitoring, and recovery, in a 24x7 production environment.

You will work on-site with the government technical team, manage an end-to-end Windows environment, and provide Tier II/III support in a small team with broad ownership responsibilities.

Qualifications

• Minimum 6 years of systems administration experience.
• Ability to obtain and maintain Public Trust suitability determination.
• Experience maintaining SCCM and using Microsoft ADS/SMS/SUS/SCCM for software distribution and patch management.
• Experience managing VMware ESX/ESXi hosts.
• Experience working with IIS and SQL Server.
• Experience supporting large internet-facing applications.
• Strong understanding of TCP/IP and networking principles.
• Proven effective written and verbal communication and teamwork.
• Ability to manage multiple tasks in a dynamic environment.

Responsibilities

• Install, rebuild, and configure Windows servers including hardware, services, directories, and storage to standards.
• Perform daily system monitoring and review system/application logs; verify job completion.
• Run daily backup operations; manage backup solution, restores, media rotation, off-site handling, and archival purges.
• Apply OS and application patches; coordinate with IA team for validation.
• Remediate security findings (POA&M).
• Provide Tier II/III support; troubleshoot and recover from failures; inform users and management.
• Create/modify/remove user accounts on request.
• Manage virtualized environments; performance tuning and resource optimization.
• Submit change requests and document system changes; maintain procedures and standards.
• Write automation scripts and produce periodic performance reports for capacity planning.

Skills

Public Trust clearance

Windows server administration

SCCM

VMware ESX/ESXi

IIS/SQL Server administration

TCP/IP networking

Strong communication

Multitasking in fast-paced environment

Tools

SCCM

VMware ESX/ESXi

IIS

SQL Server

SharePoint

PKI/SSO/smart card

DFS replication

Cloud migration

Job description

Career Opportunities with Sienna Systems Corporation

A great place to work.

Careers At Sienna Systems Corporation

Current job opportunities are posted here as they become available.

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
• 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
• 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

Company Benefits:

• Medical/dental/vision insurance
• 401(k) plan: 4% matching, immediate vesting, no restrictions
• Long- and short-term Disability coverage
• Company-sponsored Life Insurance coverage