Available to hire
I am Muhammad Zainuddin, a senior IT professional with over 11 years of experience delivering Microsoft 365 and cloud-based solutions. I architect, deploy, and support secure, scalable, high-availability Office 365 environments across multiple industries, with deep expertise in Exchange Online, Microsoft Teams, SharePoint Online, OneDrive, Entra ID, and security technologies like Purview and Defender.
I have led complex tenant-to-tenant and hybrid migrations, optimized collaboration platforms, and strengthened security, governance, and compliance to meet business and regulatory requirements. I enjoy leading technical teams and driving measurable business impact through reliable cloud strategies and secure digital workplaces.
Experience Level
Language
English
Fluent
Work Experience
Microsoft 365 Engineer at Centre Technologies
July 1, 2024 - PresentDelivered end-to-end Microsoft 365 administration across Exchange Online, SharePoint Online, OneDrive for Business, Teams, and Intune. Led hybrid and large-scale tenant-to-tenant migrations (M365-to-M365 and Google Workspace to M365) using BitTitan, MigrationWiz, Quest, and native tools with minimal downtime. Managed identity and access across AD/Entra ID, including Azure AD Connect, RBAC, MFA, Conditional Access, PIM, and Zero Trust. Designed IAM governance, entitlements, and password writeback. Administered Teams governance (guest access, external federation, retention, and lifecycle policies) and integrated Purview for DLP, retention, and eDiscovery. Deployed Defender for Office 365 and Defender for Endpoint; integrated Microsoft Sentinel and improved Secure Score. Managed Intune/Endpoint Manager for device compliance, Autopilot, and remote wipe. Supported hybrid Exchange On-Prem and SharePoint On-Prem migrations; delivered SharePoint Online/OneDrive governance; built Power Platform
Microsoft 365 Engineer at BNY Mellon Corporation
October 1, 2021 - June 1, 2024Administered Microsoft 365 services including Exchange Online, SharePoint Online, OneDrive for Business, Teams; planned and executed mailbox migrations (staged, cutover, hybrid, IMAP, and tenant-to-tenant) using BitTitan MigrationWiz, AvePoint Fly, and native tools. Led hybrid Exchange deployments; managed SMTP/mail flow and DNS records (SPF, DKIM, DMARC). Implemented SSO via ADFS, Azure AD, and Okta with MFA; managed Azure IAM (RBAC, Pass-through Authentication, Conditional Access) and enterprise app integrations. Supported Teams backend and governance, including external access, guest access, and retention policies; enabled Copilot readiness and end-user enablement. Implemented Defender for Office 365 and Purview retention/eDiscovery; built Power Platform automations and reporting. Conducted tenant health checks, security assessments, and security monitoring with Defender/Sentinel. Provided L2/L3 support, mentored service desk, and supported Yammer adoption and governance. Configured
Office 365 Admin at Cardinal Health
January 1, 2019 - September 1, 2021Administered O365 for a state government agency, covering Exchange Online, SharePoint Online, OneDrive for Business, Teams, and Entra ID. Performed user provisioning, license management, role governance, and service monitoring; executed mailbox migrations (staged, cutover, hybrid, IMAP). Configured and maintained SPF/DKIM/DMARC; administered Email Security Gateways and ESG policies to reduce phishing and BEC. Implemented SSO with Azure AD/ADFS and Okta; enforced Conditional Access and MFA. Governed Teams, SharePoint Online, and OneDrive; managed external sharing, site governance, and lifecycle. Implemented DLP policies, Purview retention labels/policies, eDiscovery, and compliance audits. Managed Intune for device compliance; built PowerShell automation for bulk user provisioning and reporting. Maintained security posture in line with state security standards, performed tenancy health checks, and produced executive dashboards. Partnered with legal/compliance for eDiscovery and data exp
Office 365 Admin at Wells Fargo
January 1, 2017 - December 1, 2018Engineered and supported a large enterprise Microsoft 365 environment with emphasis on security, availability, and compliance for regulated healthcare operations. Administered Azure AD and hybrid identity, configured SSO with Okta, MFA, and Conditional Access. Integrated SaaS apps using SAML/OAuth; troubleshot identity and federation issues; provided L2/L3 support for Exchange, Teams, SharePoint, and OneDrive. Implemented data loss prevention across email and collaboration platforms and enforced security controls for mail flow and anti-phishing protection. Led governance of Teams with external access and meeting security; managed Intune and Defender for Endpoint for device protection. Designed and implemented security monitoring and incident response capabilities; automated security audits and compliance reporting with PowerShell. Supported Azure subscription security and governance; collaborated with security, legal, and compliance teams for audits and regulatory requirements. Drove m
System Admin at Intellica
June 1, 2015 - December 1, 2016System Admin at Intellica focusing on Office 365 services including Exchange Online, SharePoint Online, OneDrive for Business, Teams, and Azure AD; supported hybrid identity with Azure AD Connect; implemented MFA and conditional access; performed user provisioning and license management. Administered SharePoint Online and OneDrive permissions, site lifecycle, and external sharing; performed basic data governance and PowerShell automation. Supported Exchange Online, including mail flow, connectors, and coexistence with on-prem; performed migration readiness and post-migration validation. Documented SOPs and troubleshooting guides; assisted with incident/change management per ITIL practices. Collaborated with security and infrastructure teams to support hybrid environments and ensure uptime.
O365 Admin at Cardinal Health
January 1, 2019 - September 30, 2021Administered O365 enterprise environment including Exchange Online, SharePoint Online, OneDrive for Business, Teams, and Entra ID. Performed mailbox provisioning, mail flow configuration, and hybrid integration with on-premises Exchange. Executed mailbox migrations, configured SMTP relays, and maintained DNS/SPF/DKIM/DMARC. Implemented and tuned Data Loss Prevention policies, eDiscovery, retention, and audit logging; managed ESG gateways for email security and threat protection; enforced SSO and Conditional Access for secure access to services.
System Admin at Intelgica
June 1, 2015 - December 31, 2016Administered O365 services including Exchange Online, SharePoint Online, OneDrive for Business, Teams, and Azure Active Directory. Managed user provisioning, mailbox administration, hybrid identity, MFA, and security controls; supported data migration projects and documented SOPs for operational efficiency; implemented basic data protection and governance policies; coordinated with security teams on incident response and compliance requirements.
Education
Bachelor's Degree in Business Administration in Finance at The University of Texas, Arlington
January 11, 2030 - May 8, 2026Bachelor of Business Administration in Finance at The University of Texas, Arlington
January 11, 2030 - May 8, 2026Qualifications
Industry Experience
Software & Internet, Financial Services, Professional Services, Healthcare, Government
Experience Level
Hire a App Developer
We have the best app developer experts on Twine. Hire a app developer in Houston today.