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YulistaSenior Systems Administrator
LocationHuntsville, AL
Work modeon-site
Typefull-time
SenioritySenior
Experience7+ yrs
Company size1,001–5,000 people
PostedOct 2, 2026 · 1w ago
Verified live18h ago
At a glanceSummarised by Seekless from the posting.
7+ years administering Windows Server in enterprise environments
Multi-domain or multi-forest Active Directory, GPO and DNS
3+ years operating production workloads in Azure: VMs, VNets, NSGs, Azure Monitor, backup and Site Recovery
Hands-on Hyper-V (VMware a plus), including backup validation and VM migration
Administering RDS and/or Azure Virtual Desktop in production
Strong PowerShell: writes reusable, documented scripts and uses source control
Works in a ticket queue and CAB-style change control, and writes clear runbooks
Active Top Secret Clearance
Experience supporting hybrid cloud environments and enterprise virtualization
Excellent troubleshooting, communication, and documentation skills
Microsoft AZ-104 (Azure Administrator)
AZ-800/801 (Windows Server Hybrid) or AZ-305
Identity management experience: Entra ID, HR-to-AD provisioning, SAML/SSO
Infrastructure as code (Bicep, Terraform) or configuration automation
Experience with multi-tenant or merger/divestiture environments
Experience mentoring junior administrators
Preference will be given to Calista shareholders and their descendants and to spouses of Calista shareholders, and to shareholders of other corporations created pursuant to the Alaska Native Claims Settlement Act
Skills
Windows Server 2016
Windows Server 2019
Windows Server 2022
Windows Server 2025
Active Directory
DNS
DHCP
IPAM
DFS
File Services
Print Services
Active Directory Certificate Services
Microsoft Entra ID
Azure AD Connect
Conditional Access
MFA
PIM
Azure Virtual Desktop
Remote Desktop Services
Windows 11 Multi-Session
FSLogix
Hyper-V
Azure IaaS
Azure Backup
Azure Site Recovery
PowerShell
Azure Automation
Sysinternals
Event Viewer
PerfMon
ETW tracing
Defender
LAPS
BitLocker
Credential Guard
Sentinel
Bicep
Terraform
VMware
About the company
StraitSys IncRegular
Position Summary
The Senior Systems Administrator is responsible for the design, administration, security, automation, and operational support of the organization’s enterprise Windows server infrastructure, Active Directory, virtualization platforms, and hybrid cloud services. This position serves as the senior technical resource for Microsoft server technologies and provides technical leadership for infrastructure modernization, automation, and operational excellence.
This position will be onsite in Huntsville, Alabama
Essential Functions
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Administer Windows Server 2016, 2019, and 2022 environments while preparing for Windows Server 2025.
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Design, administer, and troubleshoot Active Directory in complex multi-domain and multi-forest environments.
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Manage DNS, DHCP, IPAM, DFS, File Services, Print Services, and Active Directory Certificate Services.
•
Administer Microsoft Entra ID hybrid identity, Azure AD Connect, Conditional Access, MFA, and PIM.
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Manage Azure Virtual Desktop (AVD), Remote Desktop Services (RDS), Windows 11 Multi-Session, FSLogix, host pools, and image management.
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Develop PowerShell automation, Azure Automation runbooks, and repeatable operational workflows.
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Administer Hyper-V, Azure IaaS, Azure Backup, Azure Site Recovery, and hybrid networking.
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Implement enterprise security controls including Defender, LAPS, BitLocker, Credential Guard, Sentinel, and security baselines.
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Perform advanced troubleshooting using Sysinternals, Event Viewer, PerfMon, ETW tracing, and packet analysis.
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Develop documentation, standards, and operational procedures.
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Mentor junior administrators and provide technical leadership during projects and production incidents.
Required Qualifications
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7+ years administering Windows Server in enterprise environments, including multi-domain or multi-forest Active Directory, GPO and DNS
•
3+ years operating production workloads in Azure: VMs, VNets, NSGs, Azure Monitor, backup and Site Recovery
•
Hands-on Hyper-V (VMware a plus), including backup validation and VM migration
•
Administering RDS and/or Azure Virtual Desktop in production
•
Strong PowerShell: writes reusable, documented scripts and uses source control
•
Works in a ticket queue and CAB-style change control, and writes clear runbooks
•
Active Top Secret Clearance
•
Experience supporting hybrid cloud environments and enterprise virtualization.
•
Excellent troubleshooting, communication, and documentation skills.
Preferred Qualifications
•
Microsoft AZ-104 (Azure Administrator); AZ-800/801 (Windows Server Hybrid) or AZ-305 is a plus
•
Identity management experience: Entra ID, HR-to-AD provisioning, SAML/SSO
•
Infrastructure as code (Bicep, Terraform) or configuration automation
•
Experience with multi-tenant or merger/divestiture environments
•
Experience mentoring junior administrators
Core Competencies
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Enterprise Systems Administration
•
Infrastructure Automation
•
Technical Leadership
•
Operational Excellence
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Root Cause Analysis
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Mentoring
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Continuous Improvement
Success Measures
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High availability of enterprise infrastructure.
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Successful delivery of modernization initiatives.
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Operational efficiency through automation.
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Secure and compliant infrastructure.
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High-quality documentation and knowledge sharing.
PREFERENCE STATEMENT
Preference will be given to Calista shareholders and their descendants and to spouses of Calista shareholders, and to shareholders of other corporations created pursuant to the Alaska Native Claims Settlement Act, in accordance with Title 43 U.S. Code 1626(g).
EEO STATEMENT
Additionally, it is our policy to select, place, train and promote the most qualified individuals based upon relevant factors such as work quality, attitude and experience, so as to provide equal employment opportunity for all employees in compliance with applicable local, state and federal laws and without regard to non-work related factors such as race, color, religion/creed, sex, national origin, age, disability, marital status, veteran status, pregnancy, sexual orientation, gender identity, citizenship, genetic information, or other protected status. When applicable, our policy of non-discrimination applies to all terms and conditions of employment, including but not limited to, recruiting, hiring, training, transfer, promotion, placement, layoff, compensation, termination, reduction in force and benefits.
REASONABLE ACCOMMODATION
It is Calista and Subsidiaries’ business philosophy and practice to provide reasonable accommodations, according to applicable state and federal laws, to all qualified individuals with physical or mental disabilities.
The statements contained in this job description are intended to describe the general content and requirements for performance of this job. It is not intended to be an exhaustive list of all job duties, responsibilities, and requirements.
This job description is not an employment agreement or contract. Management has the exclusive right to alter the scope of work within the framework of this job description at any time without prior notice.