10/11/2026 updated
AH
100 % available
Senior Operations Specialist | Messaging & Collaboration | Microsoft 365 & Exchange
Brno, Czech Republic
Only remote
Bachelor's Degree in Computer ScienceExchange & Microsoft 365
Expertise in Exchange Subscription Edition, Exchange 2016/2013/2010/2007/2003, Exchange Online, hybrid Exchange, DAG/high availability, SMTP relay, mail flow, send/receive connectors, transport rules, shared and resource mailboxes, and migration troubleshooting.
Automation & Identity
Proficiency in Windows PowerShell, Exchange Management Shell, Exchange Online PowerShell, Microsoft Graph PowerShell, bulk administration, CSV-driven automation, reporting, migration diagnostics, validation and audit tooling, as well as Microsoft Entra ID and operational automation.
Security & Mail Flow
Hands-on experience with EOP, Defender for Office 365, Cisco ESA, SMTP/TLS, forwarding controls, outbound spam policies, secure relays, transport controls, governance, certificates, and relay design.
Migration & Transformation
Experience in cross-tenant mailbox and collaboration migration, staged/incremental migration, domain cutover, identity and recipient mapping, permission migration, Exchange upgrades and decommissioning, ShareGate, and CodeTwo.
Microsoft 365 & Identity Administration
Administration of Microsoft 365, Microsoft Entra ID, Microsoft Graph, app registrations, certificate authentication, EOP, Defender for Office 365, Microsoft Purview, Teams, and SharePoint Online.
Security & Infrastructure
Knowledge of Cisco ESA, SMTP TLS, certificates, forwarding controls, Windows Server, Active Directory, NetScaler/load balancing, failover clustering, File Share Witness, DNS, SCCM, SCOM, SAN/storage fundamentals, and Microsoft 365 SaaS backup solutions.
Service Management
Competence in incident, problem and RCA management, change management, implementation and rollback planning, testing and hypercare, ServiceNow, customer communication, documentation, vendor coordination, and mentoring and knowledge transfer.
Microsoft 365 & Delivery
Working experience with Teams, SharePoint Online and SaaS backup solutions, major incidents, RCA, change planning, cutovers, documentation, vendor coordination, and customer communication.
Expertise in Exchange Subscription Edition, Exchange 2016/2013/2010/2007/2003, Exchange Online, hybrid Exchange, DAG/high availability, SMTP relay, mail flow, send/receive connectors, transport rules, shared and resource mailboxes, and migration troubleshooting.
Automation & Identity
Proficiency in Windows PowerShell, Exchange Management Shell, Exchange Online PowerShell, Microsoft Graph PowerShell, bulk administration, CSV-driven automation, reporting, migration diagnostics, validation and audit tooling, as well as Microsoft Entra ID and operational automation.
Security & Mail Flow
Hands-on experience with EOP, Defender for Office 365, Cisco ESA, SMTP/TLS, forwarding controls, outbound spam policies, secure relays, transport controls, governance, certificates, and relay design.
Migration & Transformation
Experience in cross-tenant mailbox and collaboration migration, staged/incremental migration, domain cutover, identity and recipient mapping, permission migration, Exchange upgrades and decommissioning, ShareGate, and CodeTwo.
Microsoft 365 & Identity Administration
Administration of Microsoft 365, Microsoft Entra ID, Microsoft Graph, app registrations, certificate authentication, EOP, Defender for Office 365, Microsoft Purview, Teams, and SharePoint Online.
Security & Infrastructure
Knowledge of Cisco ESA, SMTP TLS, certificates, forwarding controls, Windows Server, Active Directory, NetScaler/load balancing, failover clustering, File Share Witness, DNS, SCCM, SCOM, SAN/storage fundamentals, and Microsoft 365 SaaS backup solutions.
Service Management
Competence in incident, problem and RCA management, change management, implementation and rollback planning, testing and hypercare, ServiceNow, customer communication, documentation, vendor coordination, and mentoring and knowledge transfer.
Microsoft 365 & Delivery
Working experience with Teams, SharePoint Online and SaaS backup solutions, major incidents, RCA, change planning, cutovers, documentation, vendor coordination, and customer communication.
Experience
Professional experience10+ years
Freelancer since2026
Languages
ArabicFluentEnglishFluent
Project history
Senior technical specialist supporting messaging and collaboration services for multiple enterprise customers. Responsibilities include managing and troubleshooting Exchange Online, Exchange Server and hybrid messaging environments, designing and supporting Exchange platform modernization and upgrade projects, supporting Microsoft 365 cross-tenant migrations, developing PowerShell and Microsoft Graph automation, designing SMTP relay and enterprise mail-flow solutions, working with Exchange Online Protection and Cisco Email Security Appliance, providing administration across Microsoft Entra ID, Teams, SharePoint Online and Microsoft 365 SaaS backup solutions, and leading major incidents and root-cause investigations.
Supported enterprise Microsoft messaging services in a large managed-services environment. Responsibilities included administering and troubleshooting Microsoft Exchange environments and Windows Server/Active Directory, supporting mailbox services and mail flow, planning and implementing production changes under formal change-management processes, using PowerShell to reduce manual administration, and working with international support teams and vendors.
Advanced support and engineering role covering Microsoft messaging and collaboration platforms. Supported Exchange 2003, 2007, 2010, 2013 and 2016 together with Enterprise Vault, BlackBerry Enterprise Server, Good Mobile Messaging, Lync/OCS, SCOM/MOM, TMG/ISA and Forefront Protection for Exchange. Took technical ownership during major incidents, created PowerShell automation and custom monitoring, planned and executed high-impact production changes, and mentored new team members. Selected projects included technical lead for an Exchange 2010 to Exchange 2016 migration covering approximately 25,000 users/mailboxes and designing a highly available client-access solution across EMEA and APAC.