Enterprise Windows Domain and Server Administrator (Senior)

COLSA; Huntsville (AL); On-site; USD 110,000 - 160,000; Full time

Benefits offered by this job

Medical, Dental, Vision

401(k) with company match

Paid time off

Job summary

COLSA is seeking a Senior Windows Server System Analyst to support Enterprise IT at Redstone Arsenal in Huntsville, AL. You will manage AD DS, DNS/DHCP, PKI, patching, security compliance, and Tier 3 support across Windows Server platforms in a large enterprise environment.

Ideal candidates have 10+ years in similar roles, a Security+CE, and DoD Secret clearance. Experience with IIS, SQL Server, and PowerShell is strongly preferred.

Qualifications

• Bachelor's degree in Computer Science, Computer Engineering, or related field.
• Active Security+CE certification.
• Minimum 10 years of experience administering Windows Server platforms.
• Experience as Windows Enterprise Domain Administrator on large networks.
• Experience deploying and sustaining Windows Domain Controllers and applications servers.
• Experience configuring Windows AD and servers per DISA STIG requirements.
• Experience with DoD STIG POA&Ms and security action plans.
• Experience developing and testing PowerShell scripts for administration.
• Proficiency with Microsoft operating systems and office apps.
• Active DoD Secret clearance; US Citizenship required.

Responsibilities

• Administer, maintain, and troubleshoot Active Directory Domain Services.
• Manage user, computer accounts, and GPOs; handle OU structure.
• Monitor domain controllers, replication, authentication, and directory synchronization.
• Manage AD sites, subnets, replication topology, and directory services.
• Maintain DNS and DHCP with secure zones and dynamic updates; troubleshoot issues.
• Sustain Windows Server platforms with monthly OS/app updates and quarterly config updates per DISA STIGs.
• Develop PowerShell scripts to improve server administration.
• Collaborate with Virtualization, Network Ops, SQL & IIS, Storage, Dev, and Cybersecurity teams.
• Provide Tier 3 support via Service Desk; support enterprise print and license services.
• Create weekly/monthly operation and engineering status documents.

Skills

Active Directory Administration

PowerShell scripting

Windows Server administration

Group Policy management

DNS/DHCP management

Security compliance

Patch management

DoD security clearance

IIS administration

SQL Server administration

Education

Bachelor's degree in Computer Science / Computer Engineering or related field

Master's degree in Computer Science / Computer Engineering

Tools

PowerShell

Microsoft SQL Server

IIS Administration

Broadcom VMware vCenter/vSphere

Delinea Privileged Access Management

Job description

Enterprise Windows Domain and Server Administrator (Senior)

General Summary
COLSA is seeking to hire a Senior Windows Server System Analyst to support our Enterprise IT Support Services work at the Army Aviation and Missile Center (AvMC) at Redstone Arsenal in Huntsville Alabama. As part of the Systems Operations team, you will assist in the administration of the enterprise infrastructure, with a primary focus on Active Directory Domain Services (AD DS), Dynamic Host Configuration Protocol (DHCP), Domain Name System (DNS), and Public Key Infrastructure (PKI). Additional responsibilities include operating system and application patch management, software license management, security compliance remediation, and providing advanced Tier 3 technical support to customers. Candidates with experience in managing Windows Internet Information Services (IIS), Microsoft SQL Server, and administrative automation through PowerShell scripting are strongly desired as well.
Principal Duties and Responsibilities (*Essential functions)

• Administer, maintain, and troubleshoot Active Directory Domain Services.
• Manage user accounts, computer accounts, security groups, organizational units (OUs), implement and maintain Group Policy Objects (GPOs).
• Monitor and troubleshoot domain controllers, replication, authentication, directory synchronization, and domain trust relationships.
• Manage Active Directory sites, subnets, replication topology, and related directory services.
• Maintain enterprise DNS and DHCP services through secure configuration of forward and reverse lookup zones, dynamic update policies, and resource records. Troubleshoot DNS resolution failures, zone replication issues, record conflicts, and related network connectivity problems associated with DHCP and general TCP/IP connectivity. Monitor DNS and DHCP service availability, performance, and security, implementing corrective actions as required.
• Sustain multiple generations of Windows Server platforms on both virtual and physical servers. Sustainment will include monthly operating system updates, server software application updates, and at least quarterly server and software configuration updates in accordance with DISA STIG requirements. Develop plans and schedules to mitigate cybersecurity findings and routinely follow up on the progress of mitigation.
• Improve server administrative efficiencies through the development of new or enhancements to existing PowerShell scripts.
• Work closely with the Virtualization Infrastructure, Network Operations, SQL & IIS, Data Storage & Archival, Software Development, and Cybersecurity teams.
• Fulfill work requests and resolve issues presented to the team through our Service Desk Management tool for work prioritization and tracking to include providing Tier 3 technical support.
• Assist with supporting enterprise print and software license services.
• Develop weekly and monthly operational and engineering support status documents for management situational awareness.
• Coordinate changes with other support teams and leverage existing change management processes.
• Responsible for preparing system design specifications to meet customer requirements as well as implementing other’s system design specifications.

At COLSA, people are our most valuable resource and centered at our core value. We invite you to unite your talents with opportunity and be a part of our “Family of Professionals!” Learn about our employee-centric culture and benefits here: https://www.colsa.com/culture_benefits

Required Experience

Required Qualifications

Bachelor's degree in Computer Science, Computer Engineering, or other related fields.

Active Security+CE certification.

Minimum 10 years of prior experience in a similar role involving administration of Windows Server platforms.

Experience as a Windows Enterprise Domain Administrator on networks having virtual and physical servers, and thousands of workstations, laptops, and users.

Experience with manual and automated methods of deploying, updating, and sustaining Windows Domain Controllers, Applications Servers, and other specialized Windows Servers.

Experience with configuration of Windows Active Directory and Windows Servers in accordance with DISA STIG requirements.

Experience with DoD’s Evaluate-STIG and the development of STIG Checklists and associated documentation required to fulfill cybersecurity Plan of Action and Mitigation Schedules (POAMs).

Experience developing, testing, and executing PowerShell scripts used to administer Windows Server systems.

Proficiency with Microsoft operating system and office applications.

• Active DoD Secret clearance; US Citizenship required.

Preferred Qualifications

• Master's degree inComputer Science, Computer Engineering, or other related fields.
• Experience with Microsoft Windows Server 2025.
• Experience with Microsoft Internet Information Services (IIS) server administration and engagement with software development teams whose sites are hosted on IIS and require administrative assistance with troubleshooting and updating their sites.
• Experience with Microsoft SQL Server administration and in association as a data source for web-based applications running on IIS.
• Experience with Delinea identity security and privileged access management product suite.
• Experience with software license management systems.
• Experience with Broadcom VMware vCenter and vSphere

Applicant selected will be subject to a government security investigation and must meet eligibility requirements for access to classified information.COLSA Corporation is an Equal Opportunity Employer, Minorities/Females/Veterans/Disabled. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or national origin.

Salary Type

Annually

The salary range, if referenced, represents a good faith estimate. COLSA considers various factors when determining base salary offers, but not limited to, location, the role, function and associated responsibilities, a candidate’s particular combination of education, knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements.

COLSA offers a comprehensive and customizeable benefits program which includes Medical, Dental, Vision, Life Insurance, Short-Term Disability, Long-Term Disability, Accidental Death & Dismemberment, Supplemental Income Protection Programs, 401(k) with company match, Flexible Spending Accounts, Employee Assistance Program, Education & Certification Reimbursement, Employee Discount Program, Paid Time Off and Holidays.

This position will be posted for a minimum of 3 business days. If a candidate has not been selected at that time, it will continue to be posted until a suitable candidate is selected or the position is closed.