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Urgent! Tier 3 – Microsoft 365 & Infrastructure Administrator Job Opening In Colombia, Colombia – Now Hiring Arvenda LLC

Tier 3 – Microsoft 365 & Infrastructure Administrator



Job description

Job Title:

Tier 3 – Microsoft 365 & Infrastructure Administrator

Location: Remote or Hybrid

Type: Part-Time

Department: IT / Infrastructure & Security

About the Role

We are looking for a highly skilled, Tier 3-level Microsoft 365 & Infrastructure Administrator to take ownership of complex system issues, lead advanced troubleshooting, and drive improvements in our IT infrastructure.

This is a senior technical role requiring deep expertise in Active Directory, Microsoft Entra ID (Azure AD), Intune, and Microsoft 365 cloud security.

You will serve as the final escalation point for infrastructure-related issues and play a key role in architecting and maintaining secure, scalable solutions.

Key Responsibilities

Tier 3 Support & Troubleshooting

  • Act as the escalation point for advanced infrastructure incidents and issues.

  • Lead root cause analysis and long-term resolution strategies.

Directory Services & Identity Management

  • Administer and optimize on-premises Active Directory (user management, OU structure, GPOs).

  • Oversee synchronization and health of Microsoft Entra ID (Azure AD) environments.

  • Troubleshoot hybrid identity issues and implement advanced configuration policies.

Endpoint & Device Management

  • Manage Microsoft Intune at an enterprise level:
  • Zero-touch provisioning, compliance policies, conditional access
  • App deployment and automation of device configuration
  • Lead MDM/MAM strategies and lifecycle governance.

Cloud Security & Governance

  • Implement and monitor Microsoft 365 security baselines, including:
  • Conditional Access
  • MFA enforcement
  • Audit logs and compliance reporting
  • Ensure alignment with cybersecurity and regulatory compliance standards.

Collaboration & Documentation

  • Maintain and secure SharePoint Online, Teams, and OneDrive environments.

  • Create and maintain detailed documentation, SOPs, and knowledge base articles.

  • Work closely with cross-functional teams to support IT infrastructure roadmaps, automation, and process improvements.

Qualifications

  • 5+ years of hands-on experience in a Microsoft enterprise IT environment.

Proven expertise in:

  • Active Directory (on-prem)
  • Microsoft Entra ID / Azure AD
  • Microsoft Intune
  • Microsoft 365 Security tools (e.g. Defender, Purview, Compliance Center)
  • SharePoint Online administration
  • Strong networking fundamentals: DNS, DHCP, VPNs, IP management.

  • Experience with hybrid environments and identity synchronization.

  • Familiarity with PowerShell scripting for automation.

  • Strong knowledge of compliance standards, risk mitigation, and IT governance.

  • Excellent communication skills and the ability to lead technical discussions.

  • Self-starter who thrives in fast-paced, complex environments.


Required Skill Profession

Other General



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