IT Infrastructure Systems Administrator
About The Position
OWL Services is seeking an IT Infrastructure–focused Systems Administrator to own our on-premises Active Directory and core Windows infrastructure in a complex, multi-domain, hybrid environment. This is not a ticket-driven support role—it focuses on designing, standardizing, securing, and modernizing identity and infrastructure across multiple business units. The ideal candidate has hands-on experience leading Active Directory cleanup and restructuring, with strong expertise in Windows Server across on-premises and Azure. This role requires enforcing standards, driving remediation, and operating effectively in M&A-driven environments while working independently and collaborating across teams.
Requirements
- 5+ years of hands-on experience administering Windows infrastructure and Active Directory environments
- Proven experience owning and redesigning Active Directory environments (not just supporting them)
- Demonstrated success in: Active Directory cleanup, consolidation, or restructuring initiatives; GPO design and standardization at scale; Managing multi-domain and/or M&A-driven environments
- Strong expertise in: Active Directory (DNS, GPO, replication, trusts); Identity & Access Management principles; PowerShell automation
- Experience with: Leading security remediation efforts from audits or penetration tests; Hybrid identity (Entra ID / Azure AD Connect) and hybrid-joined environments; Infrastructure patching and configuration management; Backup and disaster recovery planning and validation
- Ability to manage projects and priorities independently without constant supervision
- Solid understanding of networking fundamentals (TCP/IP, DNS, DHCP, VPNs, VLANs, segmentation)
- Able to collaborate effectively within a distributed IT team
Responsibilities
- Own AD architecture, health, and strategy across multiple domains
- Lead AD cleanup/restructuring (OU design, GPOs, lifecycle)
- Manage identity and access (service accounts, groups, Entra ID governance)
- Enforce standards for naming, access, group design, and least-privilege
- Build, administer, and maintain Windows Server environments (on-prem and Azure)
- Manage physical/virtual infrastructure (VMware, Hyper-V, Azure, Scale) and lifecycle
- Support modernization efforts, including migration to hybrid/cloud environments
- Own server patching (NinjaOne); partner with IT Operations team on endpoint patching (Intune)
- Maintain consistent configuration management (GPOs, baselines, policies) across environments
- Develop PowerShell automation to improve efficiency and consistency
- Own backup strategy and systems; ensure regular recovery testing for disaster recovery readiness
- Lead remediation of findings from audits, vulnerability scans, and penetration tests
- Implement and maintain infrastructure security and hardening standards
- Administer and maintain security platforms (e.g., CrowdStrike, Defender) in coordination with eSentire (SOC-as-a-Service)
- Partner across IT Infrastructure, Operations, Applications, and Development teams
- Work with business stakeholders to understand needs and communicate impacts
- Operate independently while aligning with IT priorities and standards
Benefits
- 10 Paid Holidays
- Flexible Time Off
- 401(k) with Company Match
- Health, Dental, and Vision Insurance
- HSA and FSA
- Disability & Occupational Accident Insurance
- Company-Paid Life Insurance
- Employee Assistance Program (EAP)
- Career development through world-class training programs
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
