Job DescriptionCloud Infrastructure (OCI) is seeking an experienced Microsoft 365 Engineer to join our Enterprise Collaboration Services team. This position plays a critical role in delivering secure, reliable, and scalable collaboration, messaging, and identity services supporting ***'s global workforce.
As a Microsoft 365 Engineer, you will be responsible for the administration, optimization, security, and automation of Microsoft 365 technologies across a large-scale enterprise environment supporting more than 150,000 users worldwide. You will work closely with infrastructure, security, networking, and engineering teams to ensure the availability, performance, and security of critical collaboration platforms including Exchange Online, Proofpoint, SharePoint Online, OneDrive for Business, Microsoft Entra ID (Azure AD), Microsoft Purview, Power MTA, Microsoft Teams and Eloqua.
The ideal candidate combines strong technical expertise with a passion for operational excellence, automation, and continuous improvement. You will help drive modern workplace initiatives while implementing enterprise-grade security controls, governance policies, and automation solutions that enhance employee productivity and protect organizational assets.
What You Will Do- Administer and support Microsoft 365 services including Exchange Online, Microsoft Teams, SharePoint Online, OneDrive for Business, Microsoft Entra ID (Azure AD), and Microsoft Purview.
- Manage enterprise messaging infrastructure, mail flow, transport rules, email security, and collaboration services in a highly available global environment.
- Configure, maintain, and optimize email security solutions using Proofpoint.
- Implement and manage email authentication technologies including DMARC, SPF, and DKIM to improve email security and domain protection.
- Design, develop, and maintain PowerShell automation and scripting solutions to streamline operational processes and improve service reliability.
- Administer identity and access management technologies including Conditional Access, Multi-Factor Authentication (MFA), Single Sign-On (SSO), and Privileged Identity Management (PIM).
- Monitor system performance, availability, and security while proactively identifying and resolving issues affecting Microsoft 365 services.
- Troubleshoot complex technical issues across collaboration, identity, messaging, and endpoint management platforms.
- Support compliance, governance, retention, eDiscovery, and information protection initiatives using Microsoft Purview and related technologies.
- Collaborate with security, networking, cloud, and engineering teams to design and implement scalable, secure, and resilient enterprise solutions.
- Maintain technical documentation, operational procedures, architectural standards, and knowledge base content.
- Participate in an on-call rotation supporting business-critical collaboration and messaging services.
Required Qualifications- 6+ years of experience administering Microsoft 365 in large-scale enterprise environments.
- 6+ years of experience administering Proofpoint in large-scale enterprise environments.
- Strong expertise supporting Exchange Online, Microsoft Teams, SharePoint Online, and OneDrive for Business.
- Experience administering Microsoft Entra ID (Azure AD) and Active Directory environments.
- Experience implementing and managing Conditional Access, MFA, SSO, and identity security controls.
- Strong experience with email security platforms such as Proofpoint and Microsoft Defender for Office 365.
- Strong experience with Linux operating system.
- Hands-on experience implementing and managing DMARC, SPF, and DKIM.
- Advanced PowerShell scripting and automation experience.
- Experience administering Windows Server and Linux systems.
- Strong troubleshooting, analytical, and problem-solving skills.
- Excellent written and verbal communication skills.
- Ability to work effectively in a fast-paced, highly collaborative environment.
Responsibilities- Administer and support Microsoft 365 services including:
- Exchange Online
- Microsoft Teams
- SharePoint Online
- OneDrive for Business
- Microsoft Entra ID (Azure AD)
- Microsoft Defender for Office 365
- Microsoft Purview
- Microsoft Intune
- Manage enterprise Proofpoint messaging environments, mail flow, and email security solutions.
Configure and maintain email authentication technologies including:Administer identity and access management solutions, including:- Conditional Access
- Multi-Factor Authentication (MFA)
- Single Sign-On (SSO)
- Privileged Identity Management (PIM)
- Develop and maintain PowerShell automation and scripting solutions to improve operational efficiency and service reliability.
- Monitor, troubleshoot, and resolve complex issues across Microsoft 365 services and integrated enterprise platforms.
- Implement security best practices aligned with Zero Trust principles and organizational compliance requirements.
- Support Microsoft 365 governance, retention, compliance, eDiscovery, and information protection initiatives.
- Collaborate with security, network, cloud, and engineering teams to design and implement scalable enterprise solutions.
- Maintain technical documentation, architecture diagrams, operational procedures, and knowledge base articles.
- Participate in an on-call rotation supporting critical enterprise collaboration services.
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