The Senior Directory Services Engineer leads the design, modernization, and security of enterprise identity infrastructure, including Active Directory architecture and lifecycle management. They are responsible for driving root-cause analysis, developing automation standards, and collaborating with cross-functional teams to ensure directory stability.
Dexter Technologies Inc., is a leading provider of Staffing and Recruiting Services. For over two decades, we have put countless professionals to work at exciting opportunities. We are proud of the fact that many of them have been promoted to more senior roles: management, senior management, and senior executive leadership positions.
We are actively seeking qualified candidates for the following position for our client, who is an industry leader:
The Senior/Principal Directory Services Engineer is the organization’s top technical authority for Active Directory and core identity infrastructure. This role leads the design, modernization, security, and lifecycle management of enterprise directory services, ensuring reliability, scalability, and alignment with business and regulatory requirements.
Key Responsibilities
Serve as the principal expert for Active Directory architecture, design, and operations across multi‑domain, multi‑forest environments.
Lead modernization initiatives including domain consolidation, schema upgrades, AD hardening, and identity lifecycle automation.
Architect and maintain Group Policy, DNS, DHCP, replication, trusts, and domain controller strategy.
Oversee AD security posture: privileged access, tiering models, delegation, auditing, and Zero Trust alignment.
Drive root‑cause analysis and resolution of complex directory issues impacting authentication, authorization, and enterprise applications.
Develop standards, runbooks, and automation using PowerShell and modern configuration tools.
Collaborate with cross‑functional teams (Security, Cloud, Infrastructure, Applications) to ensure directory stability and performance.
Evaluate and optimize vendor, contractor, and staffing partnerships supporting directory services.
Required Experience
10+ years of hands‑on experience with Active Directory in large, complex enterprise environments.
Expert‑level knowledge of AD architecture, domain controllers, replication, GPOs, DNS/DHCP, trusts, and security models.
Strong experience with PowerShell scripting and automation.
Deep understanding of identity security, privileged access management, and Zero Trust principles.
Proven ability to lead large‑scale directory upgrades, migrations, and remediation efforts.
Preferred Qualifications
Background in AD forest recovery, DR planning, and cyber‑resiliency hardening.
Microsoft certifications (MS‑102, AZ‑104, SC‑300) or equivalent is a plus
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