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Hans Marcelin

@hansmarcelin

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Senior Microsoft 365 Engineer at U.S. Marshals Service who automated onboarding from two days to 15 minutes.

United States

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At U.S. Marshals Service, I administered Exchange Online, SharePoint Online, and Microsoft Teams for 5,500 users while maintaining 99.95% service availability. I also automated user provisioning and license assignment, reducing onboarding time from two days to 15 minutes.

I implemented Microsoft Purview DLP and sensitivity-labeling workflows, including automated labeling for 1.2 million documents. I developed Power Automate approval workflows that cut equipment-request approval time from five days to six hours.

At Freddie Mac, I supported migrations of more than 10,000 mailboxes to Exchange Online and 45 TB of file data to OneDrive for Business and SharePoint Online. Across my work in federal agencies and enterprise environments, I’ve supported Microsoft 365 administration, identity management, security, and compliance.

Experience

Work history, roles, and key accomplishments

Senior Systems Engineer

Applied Insight

May 2018 - Oct 2026 (8 years 5 months)

Administered and supported Exchange Online, SharePoint Online, and Microsoft Teams for 5,500 users, maintaining 99.95% service availability and reducing major email outages by 40%. Implemented Microsoft Purview DLP policies, automated administrative tasks with PowerShell, and developed SOPs and runbooks.

Exchange Online SharePoint Online Microsoft Teams Microsoft Purview DLP PowerShell Microsoft Graph Power Automate Power BI Azure AD Intune Conditional Access Sensitivity Labels eDiscovery Audit Logging

Senior Systems Engineer

Freddie Mac

Feb 2018 - May 2018 (3 months)

Migrated over 10,000 mailboxes from Exchange Server 2010 to Exchange Online, 10,000 users to Microsoft Teams, and 45 TB of file data to OneDrive and SharePoint. Maintained Azure AD synchronization and implemented data governance controls including DLP and retention policies.

Exchange Online Microsoft Teams OneDrive For Business SharePoint Online Azure AD DLP Retention eDiscovery PowerShell PST Migration Hybrid Migration

Senior Microsoft Engineer

Equal Employment Opportunity Commission

Dec 2016 - Feb 2018 (1 year 2 months)

Implemented identity federation between ADFS and Office 365 for SSO and MFA, migrated 2,700 users from Novell to Active Directory and Office 365, and enforced Conditional Access via Intune for 3,100 devices.

ADFS SSO MFA Active Directory Office 365 Microsoft Intune Conditional Access Novell Migration Azure AD

Microsoft Office 365 Integration Consultant

Microsoft

Jul 2016 - Nov 2016 (4 months)

Deployed and configured Office 365 and Azure AD integrations for eight enterprise customers, including identity federation and hybrid connectivity. Designed highly available ADFS environments and supported ExpressRoute and site-to-site VPN connectivity.

Office 365 Azure AD ADFS Identity Federation ExpressRoute VPN Hybrid Connectivity

Systems Engineer

U.S. Department of Agriculture

Feb 2015 - Jul 2016 (1 year 5 months)

Consolidated endpoint management for 4,000 devices using ConfigMgr and Intune, supported mobile device management, and administered Active Directory, VMware, and Citrix infrastructure.

Configuration Manager Microsoft Intune MDM Active Directory VSphere Citrix Virtual Apps And Desktops Windows Infrastructure Remedy

Systems Engineer

Brandon Technology Consulting

Nov 2011 - Jan 2015 (3 years 2 months)

Provided systems engineering support involving Office 365, ADFS 2.0, DirSync, SharePoint 2010, Hyper-V, VMware ESXi, and SonicWall.

Office 365 ADFS Directory Sync SharePoint 2010 Hyper V VMware ESXi Sonicwall

Technical Analyst

Cisco Systems

Jan 2001 - Nov 2011 (10 years 10 months)

Provided technical analysis and support for Active Directory, Cisco Unified Communications Manager, TelePresence, VPN, and enterprise network operations.

Active Directory Cisco Unified Communications Manager (CUCM)Telepresence VPN Network Operations