Yohannes Berehanu
Senior System Engineer @Starz
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WORK HISTORY
Senior System Engineer @Starz
Denver, CO, US
Led Microsoft 365 Tenant Split: Designed and executed the separation of Starz’sM365 environment from parent company Lionsgate, ensuring business continuity,secure collaboration, and minimal downtime.• Exchange Modernization: Directed the migration from on-premises Exchange toExchange Online, delivering a fully cloud-based, scalable email solution for theenterprise.• Archive & Compliance Transformation: Architected and led the migration ofon-premises Enterprise Vault archives to Mimecast, and managed the split ofMimecast tenancy from Lionsgate. Implemented company-wide retention policiesfor communications in collaboration with Compliance, resulting in significant costsavings in storage and migration efforts.• Identity Modernization: Currently spearheading the migration of Identity Provider(IdP) services from Okta to Microsoft Entra ID, including development of enterpriseIdentity & Access Management processes leveraging Entra Lifecycle Workflowsintegrated with Workday as the single source of truth.• Platform Ownership: Serve as platform owner for the entire Microsoft 365 stackand Mimecast tenant, partnering closely with Cybersecurity to ensure securecollaboration, compliance, and governance.• Subject Matter Expertise: Recognized SME and environment owner for Okta;provide guidance, strategy, and escalation support across identity, collaboration,and compliance platforms.
EDUCATION
Chadron State College
Bachelor’s Degree, Management Information Systems, General
ABOUT YOHANNES BEREHANU
Highly skilled and results-driven IT Systems Engineer with over a decade of experienceleading enterprise-scale technology transformations. Proven expertise in architectingand executing complex Microsoft 365, Exchange, and identity platform migrations,including large-scale tenant splits, email modernization, and archive consolidations.Platform owner across Microsoft 365 and Mimecast, ensuring secure, compliant, andcost-efficient collaboration.Recognized for designing and leading migrations such as Exchange On-Prem to ExchangeOnline, Enterprise Vault archives to Mimecast, and tenant separations across Microsoft365 and Mimecast. Currently driving identity modernization by migrating from Okta toMicrosoft Entra ID, and implementing enterprise-wide Identity & Access Managementprocesses integrated with Workday as the single source of truth. Delivered company-wideretention and governance strategies that reduced storage costs, streamlined compliance,and improved audit readiness. Strong technical leadership, stakeholder engagement,and cross-functional collaboration skills with a proven track record of deliveringmeasurable business value through technology.
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