Systems Admin, Sr.

4 weeks ago

Pasay, Philippines Stefanini North America and APAC Full time
Responsibilities
  • Serve as the technical expert and escalation point for all Active Directory-related incidents and requests.
  • Design, implement, and manage complex AD environments including forests, domains, trusts, and replication.
  • Maintain and enforce Group Policy Objects (GPOs), including creation, auditing, and lifecycle management.
  • Ensure the security and compliance of AD environments through regular reviews, hardening, and monitoring.
  • Design, manage, and troubleshoot AD Sites and Services.
  • Plan and implement site topology, subnet mapping, replication schedules and bridgehead server configuration.
  • Ensure DNS and AD environments are secure, highly available, and compliant.
  • Support hybrid identity solutions such as Azure AD Connect and ADFS.
  • Troubleshoot and resolve replication issues, authentication failures, and DNS-related problems.
  • Collaborate with InfoSec and IAM teams to implement RBAC, privileged access management, and security baselines.
  • Lead AD upgrades, migrations, consolidations, and DR planning.
  • Maintain documentation of AD infrastructure, policies, and procedures.
  • Mentor junior team members and provide knowledge sharing and training.
  • Act as second-level liaison between the client and service provider.
  • Define, write, and maintain PPM (Process and Procedure Manual) for the project.
  • Assigned special projects.
  • Analyze systems, review and implement improvements or upgrades to enhance user experience and to prevent capacity issues.
  • Participate in rotating on-call schedule and assist in after-hours monthly maintenance.
  • Primary lead in training and mentoring less-experienced members of the team.
  • Primary lead in assigned special projects.
Identity And Access Management Mastery
  • Extensive experience in designing and implementing complex identity and access management solutions, including RBAC, access governance, and privileged identity management (PIM).
  • Proficiency in integrating Azure AD with various Microsoft and non-Microsoft services, including Azure, Office 365, and third-party applications.
Directory Services
  • In-depth knowledge of directory synchronization methods, including Azure AD Connect and Azure AD Domain Services.
  • Experience in architecting and managing complex directory structures for multi-domain and multi-forest environments.
Scripting And Automation Skills
  • Proficiency in scripting and automation with PowerShell, Azure CLI, or other relevant tools for Azure AD management and reporting.
Communication And Documentation
  • Excellent communication skills, including the ability to communicate complex technical concepts to non-technical stakeholders.
  • Strong documentation skills for creating comprehensive architectural and operational documentation.
Skills, Licenses, Knowledge, Education, And Training Requirements:
  • 7+ years of hands-on experience with Microsoft Active Directory in a large-scale enterprise environment.
  • ADDS, DNS, DHCP, DFS, and GPO management
  • Kerberos, LDAP, NTLM, and authentication mechanisms
  • AD replication and health monitoring tools
  • Strong knowledge of Windows Server (2016/2019/2022).
  • Strong experience in troubleshooting AD replication and authentication across multi-site environment.
  • Experience with PowerShell scripting and automation for AD tasks.
  • Familiarity with security best practices for Active Directory.
  • Experience integrating AD with enterprise tools (e.g., MIM, Azure AD, ADFS, Okta, Duo).
  • Solid understanding of change management, ITIL processes, and incident escalation procedures.
  • Microsoft certifications (e.g., Microsoft Certified Identity and Access Administrator Associate, MCSE, etc.)
  • Experience with hybrid cloud environments and identity federation.
  • Familiarity with auditing tools such as Quest Change Auditor or similar.
  • Knowledge of Active Directory disaster recovery and backup strategies.
  • Experience with DNS management tools and IPAM.
  • Experience supporting DNS in hybrid and cloud environments.
  • Experience in AD disaster recovery, DNS failover, and high availability setups.
Seniority level
  • Mid-Senior level
Employment type
  • Full-time
Job function
  • Information Technology
Industries
  • IT Services and IT Consulting
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