Dwayne Rufus
@dwaynerufus
Senior Messaging and Systems Engineer specializing in Microsoft Exchange.
United StatesWhat I'm looking for
I am a results-driven Messaging and Systems Engineer with deep expertise in Microsoft Exchange, Microsoft 365 services, and Azure AD Connect implementation. I excel at diagnosing complex messaging issues, optimizing mail flow, and improving security and compliance across large, distributed environments.
I have led cross-functional initiatives to enhance service reliability and streamline operational processes, implemented scalable directory synchronization and disaster recovery solutions, and authored SOPs and system architecture documentation to support enterprise operations. I use PowerShell automation and monitoring tools to increase efficiency and maintain high availability.
A collaborative technical leader, I have supported thousands of users and managed infrastructures for large organizations, maintaining near-continuous uptime and mentoring junior staff. I seek to deliver modern, secure messaging infrastructures that align with business goals and compliance requirements.
Experience
Work history, roles, and key accomplishments
Sr. Exchange Engineer
Insight Enterprises
May 2025 - Dec 2025 (7 months)
Led maintenance and troubleshooting of Microsoft Exchange Online and On-Premises for client environments, improving email security and maintaining 99.99% system availability through standards and break/fix resolution.
Exchange Engineer
Southwest Business Corporation
Jun 2022 - Jan 2025 (2 years 7 months)
Managed and optimized Exchange environments and Azure Active Directory, implemented security protocols and automation scripts to maintain uptime and improve operational efficiency across large-scale infrastructures.
Exchange Engineer
StratasCorp
Apr 2021 - Jan 2022 (9 months)
Provided advanced Exchange support for thousands of global users, implemented directory synchronization and SOPs, and led disaster recovery and cybersecurity readiness to ensure continuous, compliant messaging services.
Messaging Services Specialist
NTT Data Services
Aug 2012 - Mar 2020 (7 years 7 months)
Managed Exchange and Office 365 infrastructure, resolved complex incidents, and implemented monitoring tools to improve messaging performance and reduce incident response times.
Sr. Systems Administrator
CoreLogic
Feb 2006 - Aug 2012 (6 years 6 months)
Designed and managed enterprise messaging for 50,000+ mailboxes, led Active Directory consolidation projects, implemented real-time analytics and SOPs, and provided 24/7 Exchange and Office 365 support.
Education
Degrees, certifications, and relevant coursework
MUMarymount California University
Associate of Science, Computer Science
2000 - 2002
Completed an Associate of Science in Computer Science focused on foundational programming and systems concepts between 2000 and 2002.
Tech stack
Software and tools used professionally
Availability
Location
United StatesAuthorized to work in
Job categories
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