Senior AD/Entra ID & Exchange Engineer - Onsite Contract

Headway Tek Inc; McKinney (TX); On-site; USD 80,000 - 100,000; Full time

Job summary

A leading IT consulting company in McKinney, Texas is seeking an Active Directory / Entra ID & Exchange Engineer to provide expert-level support across Active Directory and Entra ID environments. Responsibilities include designing and managing AD forests, group policies, and Microsoft Exchange Server configurations. The ideal candidate has strong expertise in Windows Server, PowerShell scripting, and troubleshooting complex authentication issues. This is a contract position requiring immediate start.

Qualifications

• Proven experience installing and configuring AD forests/domains from scratch.
• Strong expertise in Windows Server environments.
• Hands-on experience with Entra ID (Azure AD), RBAC, MFA, and identity integrations.
• Deep understanding of GPOs, DNS, DHCP, and certificate services.
• Strong PowerShell scripting skills for automation and reporting.
• Solid grasp of authentication protocols (Kerberos, NTLM, LDAP).
• Experience with AD/Entra ID health checks, audits, and remediation.
• Ability to troubleshoot complex AD replication and sync issues.

Responsibilities

• Design, build, and manage AD forests, domains, sites, and trusts.
• Configure and maintain FSMO roles, DFS, and domain replication.
• Administer AD Certificate Services, DNS, DHCP, and OU structures.
• Implement and enforce Group Policies (GPOs) aligned with security baselines.
• Manage AD groups, security permissions, and delegation of access.
• Perform AD backups, restores, and disaster recovery.
• Troubleshoot login/authentication issues involving LDAP, Kerberos, NTLM.
• Configure and maintain RBAC, MFA, and privileged access management.
• Conduct AD audits, health checks, and remediation activities.
• Manage AD password policies and fine-grain password policies.
• Develop and maintain PowerShell scripts for automation and reporting.
• Troubleshoot, configure, and maintain Entra ID integrations and Azure AD Connect.
• Provide L3 support for AD and Entra ID environments.
• Install, configure, and manage Microsoft Exchange Server in hybrid and on-prem environments.
• Administer Exchange Online, including mailbox provisioning and retention policies.
• Configure and troubleshoot hybrid mail flow between on-prem Exchange and Exchange Online.
• Manage Exchange security settings, including anti-spam and transport rules.
• Perform database maintenance and disaster recovery for Exchange environments.
• Implement and maintain Exchange certificates, Autodiscover, and Outlook connectivity.
• Monitor and optimize Exchange performance and storage utilization.

Skills

Installing and configuring AD forests/domains

Windows Server environments

Entra ID (Azure AD), RBAC, MFA

Group Policies (GPOs)

PowerShell scripting

Authentication protocols (Kerberos, NTLM, LDAP)

AD health checks and audits

Troubleshooting AD replication issues

Tools

Microsoft Exchange Server

Exchange Online (Microsoft 365)

Job description

A leading IT consulting company in McKinney, Texas is seeking an Active Directory / Entra ID & Exchange Engineer to provide expert-level support across Active Directory and Entra ID environments. Responsibilities include designing and managing AD forests, group policies, and Microsoft Exchange Server configurations. The ideal candidate has strong expertise in Windows Server, PowerShell scripting, and troubleshooting complex authentication issues. This is a contract position requiring immediate start.