Kas is available for hire
Hire KasKas Tsaedu
Verified Expert in Engineering
DevOps Engineer and Software Developer
Washington, DC, United States
Toptal member since February 5, 2023
Bio
Kahsay is an Office 365 engineer with over 10 years of experience working on numerous projects, including administrating, designing and deploying infrastructure, mailbox migration, email security solutions, and Azure AD. He is passionate, organized, and meticulous about planning, always focusing on delivering the right solution. While he has a good technical background, he strives for simple and elegant solutions to solve the most complex of problems.
Portfolio
InPath Devices Inc.
Microsoft Teams
Wicresoft
Windows PowerShell, Microsoft Exchange Online, Troubleshooting, Gmail...
GEICO
Windows PowerShell, Microsoft Exchange, Microsoft Exchange Server...
Experience
- Microsoft Exchange - 7 years
- Microsoft Exchange Online - 7 years
- Migration - 5 years
- Troubleshooting - 5 years
- Email Authentication - 5 years
- Azure Active Directory B2C (ADB2C) - 5 years
- SharePoint 365 - 4 years
- Microsoft Exchange Server - 3 years
Availability
Part-time
Preferred Environment
Windows
The most amazing...
...migrations I've led are tenant-to-tenant multiple mailboxes from on-premises to the cloud from third-party providers like G Suite to Office 365.
Work Experience
Developer
2025 - 2025
InPath Devices Inc.
- Developed a TCO model for 2,000 users of Microsoft Teams VoIP Phone system.
- Designed the integration of Microsoft Teams with 3rd-party phone systems using Direct Routing.
- Estimated the cost required for multiple 3rd-party and Microsoft phone system integration options with Microsoft Teams.
Technologies: Microsoft Teams
Senior O365 Engineer
2020 - 2023
Wicresoft
- Gave expert-level technical support to Cloud-based MS customers, such as Office 365, exchange online, SP online, Teams Outlook, security, and compliance, MS endpoint management (Intune), Microsoft Defender for 365, Azure AD, and eDiscovery.
- Led effort to improve outbound email authentication rates across many high-volume domains and business units, including SPF, DKIM, and DMARC, within a large complex messaging environment, leading to improved authentication rates.
- Improved company's security using Azure AD permission, conditional access policy, MFA, identity and access management, RBAC, Azure Security, SSO in Azure AD, and group policies. I'm an expert in MFA, SSPR, CBA, and IAM like SAML, OpenID, and OAuth 2.
- Managed mailbox migration from on-prem to cloud and complex messaging migration scenarios, including Hybrid Office 365 configuration. Acquired knowledge of migration best practices and troubleshooting.
- Led the mailbox migration process, MS teams, and SharePoint files from private to public cloud environments and tenant-to-tenant migration using tools like Sharegate, Quest on Demand, Bit Titan, and Microsoft built-in migration tools.
- Implemented automated, manual, or PowerShell methods to migrate mail, rules, contacts, and calendar from Gmail to Office 365. Hands-on experience migrating mailboxes from Google Workspace (G Suite) and more IMAP-based email servers to Office 365.
- Acquired demonstrable knowledge of migration best practices and pre- and post-migration troubleshooting skills using PowerShell and logs.
- Provided hands-on customer support for Exchange Online, Microsoft security solutions, Outlook, enterprise security, and compliance, M365/O365 web apps, MS365 Admin Centre, SharePoint, OneDrive, MS Teams, and Azure AD portal.
- Managed user accounts, permissions, and groups. Created and managed SharePoint sites, libraries, and lists. Enforced security policies and managed permissions. Fixed issues on SP functionality, performance, and integration with other systems.
- Migrated SharePoint files and resources from on-premises to cloud and tenant-to-tenant. I'm an expert on SP migration tools, migration using migration manager, and other 3rd-party SaaS solutions like Sharegate, Quest On Demand Migration, etc.
Technologies: Windows PowerShell, Microsoft Exchange Online, Troubleshooting, Gmail, Office 365, SharePoint 365, SharePoint 2016
Exchange Online Administrator
2017 - 2020
GEICO
- Maintained smooth company workflow by managing Exchange 2013 and 2016 servers, Microsoft 365 exchange online, and technical support to end-users. Built strong relationships with team members by resolving staff problems using the PowerShell script.
- Led migration efforts from on-premises to Office 365. Migrated 2,400 mailboxes, DL, resource mailboxes, and active users from on-premises to Exchange Online (Cloud) to create a hybrid deployment.
- Set up and configured Exchange online accounts for over 2,500 users, retention policies, and eDiscovery management. Enforced email security and calendar policies. Managed users' permission, license, mailbox size, quota, and mail flow rules.
- Spearheaded efforts to improve inbound email security controls by evaluating best-in-class providers, conducting pilots, and overseeing selected solutions' configuration, deployment, tuning, and maintenance.
- Followed up and validated the health, status, operations, and maintenance of identity management systems such as Active Directory, Azure Active Directory, Directory Synchronization (AADC/DirSync), and Active Directory Federation Services (ADFS/CBA).
- Worked as SP administrator, managing user accounts, OneDrive accounts, permissions, and groups. Gained experience in creating and managing SharePoint sites and libraries.
- Configured policies like retention, information protection, OneDrive access policies, file management, security updates, and careful management.
- Gained knowledge in SharePoint functionality, performance, and integration with other systems.
Technologies: Windows PowerShell, Microsoft Exchange, Microsoft Exchange Server, Email Protocols, Azure Administrator, Troubleshooting, Office 365
IT Administrator
2015 - 2017
Belk
- Collaborated with the Information Security and Network Team, supporting and maintaining our email firewall.
- Provided hands-on support in installing new computer systems, resolving hardware issues, upgrading software, troubleshooting network systems, and providing general IT support.
- Implemented the best available solutions to meet the needs of the organization. Analyzed feasibility and performed testing of new features as they became available.
- Managed documentation of security processes, evaluated tooling in the ever-changing environment, and ensured we were secure.
- Utilized Agari Brand Protection to analyze and monitor the status of email authentication solutions for compliance with phishing resistance solutions.
- Improved enterprise desktop and email security solutions for busines stakeholders.
Technologies: Networking, IT Helpdesk, Desktop Support, SMTP, Email, Office 365
Data Analyst
2013 - 2015
Policy Studies Institute
- Undertook research or policy gaps analysis, developing and administering survey collecting, organizing, and analyzing opinions and data, creating reports, analyzing data, and presenting the findings.
- Organized and maintained research databases and analyzed data using tools like Stata, SPSS, Python, R, and Excel sheet.
- Served as supervisor of research projects, communicating with team members and verifying that all projects and tasks were on schedule.
Technologies: Econometrics, STATA, SQL, Python, R, SharePoint 2016
Experience
Mailbox Migration
I led a migration process of mailboxes from on-premises to Office 365. Engaged in the project by collecting requirements and functional and technical design documentation and collaborated with project implementation.
I managed and ran the hybrid migration wizard, which creates a hybrid migration endpoint in the exchange center, and deployed the exchange hybrid. I led a team of engineers from on-premises and the cloud server and successfully migrated 2,400 users' mailboxes, DL, contacts, and calendars from on-premises to Office 365.
I managed and ran the hybrid migration wizard, which creates a hybrid migration endpoint in the exchange center, and deployed the exchange hybrid. I led a team of engineers from on-premises and the cloud server and successfully migrated 2,400 users' mailboxes, DL, contacts, and calendars from on-premises to Office 365.
Education
2011 - 2013
Bachelor's Degree in Computer Science
Mekelle University - Mekelle, Ethiopia
Certifications
DECEMBER 2022 - DECEMBER 2023
Microsoft Certified: Power BI Data Analyst Associate
Microsoft
AUGUST 2022 - PRESENT
Microsoft 365 Certified: Exchange Online Support Engineer Specialty
Microsoft
JUNE 2022 - PRESENT
Azure Fundamentals
Microsoft
APRIL 2022 - APRIL 2024
MuleSoft Certified Developer
MuleSoft
Skills
Libraries/APIs
API Development
Tools
Microsoft Exchange, Azure Active Directory B2C (ADB2C), Microsoft Teams, STATA, Microsoft Exchange Online, Anypoint Studio
Platforms
SharePoint 2016, Windows, Azure IaaS, MuleSoft, SharePoint 365
Storage
Microsoft Exchange Server, DataWare, Azure Active Directory
Languages
Python, SQL, R
Frameworks
Windows PowerShell
Other
Migration, Email Authentication, Office 365, Econometrics, Computer Skills, Economics, Data Analysis, Database Analytics, Economic Analysis, Research, Troubleshooting, Data Analytics, Data Entry Analysis, Data Visualization, Azure Administrator, CloudHub, API Integration, Email Protocols, Networking, IT Helpdesk, Desktop Support, SMTP, Email, Gmail, Software Deployment, PnP PowerShell
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