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Active Directory Consultant

Apex Informatics

Title: Active Directory Consultant Location: Exton, PA Job Description: Key Responsibilities Current-state assessment: Document AD forest/domain topology, sites/subnets, trust model, FSMO/GC placement, replication health, SYSVOL (DFSR), and GPO landscape; evaluate hybrid identity (Entra Connect/Cloud Sync, PHS/PTA, Seamless SSO, Hybrid/Azure AD Join). Stability & performance: Improve inter-site replication , site design, and logon performance; rationalize GPOs; standardize DC build/patch/baseline; ensure time/NTFS/DFS settings are correct. Core services: Review and optimize DNS (forwarders, scavenging, split-brain, conditional forwarding), DHCP (failover, reservations, authorization), and AD CS (PKI hierarchy, CRL/OCSP, key rollovers, certificate templates). Hybrid & co-management: Validate Intune/ConfigMgr co-management boundaries and device join, certificate delivery, and policy conflicts; recommend workload split and device compliance improvements. Security & governance : Implement tiering/least-privilege, PIM/PAM patterns, admin tier separation, LAPS/Windows LAPS, service account hardening, audit/monitoring, backup & forest recovery readiness. Remediation plan & delivery: Produce a prioritized backlog with risks, effort, dependencies, and rollback; execute changes via change control with our internal team; provide runbooks and knowledge transfer. Documentation & handover: Deliver updated as-built , standards, and SOPs; train operations on monitoring (dcdiag/repadmin/Eventing), backup/restore drills, and ongoing hygiene. Required Qualifications 10+ years deep experience designing and remediating enterprise AD across multi-site environments, including hybrid identity with Microsoft Entra. Proven track record delivering assess-plan-fix engagements for AD, DNS/DHCP, and AD CS in regulated/global organizations. Hands-on expertise with: Windows Server (2016/2019/2022) DCs; Entra Connect/Cloud Sync ; Hybrid/Azure AD Join; DFSR/SYSVOL; Group Policy refactoring; DHCP failover ; PKI operations. Strong security background (tiered admin model, privileged access, GPO security baselines, backup & forest recovery ). Excellent stakeholder communication; ability to lead mixed vendor/internal teams and land changes through formal change management . Apex Informatics

Vacancy posted 3 days ago
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