Remote Senior Active Directory Architect & Identity Engineer

DEXTER TECHNOLOGIES INC; Houston (TX); Remote; USD 120,000 - 180,000; Full time

Job summary

Dexter Technologies Inc. is seeking a Senior Directory Services Engineer (Active Directory Expert) for a remote contract-to-hire engagement. You will lead AD architecture, domain controllers, and security modernization across multi-domain environments.

You will drive automation with PowerShell, manage identity security, and guide staff through large upgrades and migrations while coordinating with Security, Cloud, and Infrastructure teams.

Qualifications

• 10+ years of hands-on 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.

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.

Skills

Active Directory

Zero Trust

Identity security

Privileged access management

Domain controllers

GPOs

DNS/DHCP

Tools

PowerShell

Job description

Dexter Technologies Inc. is seeking a Senior Directory Services Engineer (Active Directory Expert) for a remote contract-to-hire engagement. You will lead AD architecture, domain controllers, and security modernization across multi-domain environments.

You will drive automation with PowerShell, manage identity security, and guide staff through large upgrades and migrations while coordinating with Security, Cloud, and Infrastructure teams.