Romell Mascarinas
@romellm
Senior IAM & Infrastructure Engineer | Active Directory | Identity & Access Management | Windows Server | IT Operations
PhilippinesWhat I'm looking for
At Tata Consultancy Services, I provide identity, infrastructure, and hybrid cloud engineering for Shell’s global enterprise platforms. I modernized a multi-domain Active Directory forest by migrating domain controllers to Windows Server 2022 Core.
I restored PKI and Certificate Authority functionality in Azure-based environments by renewing CA certificates, correcting CRL/AIA paths, and rebuilding certificate chains. I also engineered an Active Directory disaster recovery proof of concept using RMAD DRE and directed forest recovery testing with VEEAM and Microsoft’s Forest Recovery Methodology.
Earlier, at DXC (formerly HPE), I was Technical Lead for enterprise messaging, Active Directory, and PKI. My professional objective is to advance into AI infrastructure and MLOps, bridging traditional enterprise IT with modern AI platforms.
Experience
Work history, roles, and key accomplishments
Technical Consultant – Enterprise and Technology Projects
Dec 2018 - Aug 2026 (7 years 8 months)
Provided senior-level identity, infrastructure, and hybrid cloud engineering for Shell's global enterprise platforms, leading modernization initiatives, disaster recovery strategies, and PKI lifecycle management.
Technical Lead – Enterprise Messaging, Active Directory & PKI
Aug 2008 - Dec 2018 (10 years 4 months)
Operational and technical lead for global enterprise Messaging, Active Directory, and PKI environments, ensuring maximum uptime, compliance, and rapid incident resolution.
Delivered enterprise-level Wintel support across Windows Server 2008 environments, managing servers, SAN storage arrays, and enterprise print/file services.
Provided local IT support and systems administration for Shell's corporate offices, offshore drilling rigs, and remote gas production plants over a 9-year engagement.
Education
Degrees, certifications, and relevant coursework
Adamson University
Bachelor of Science, Computer Engineering
1991 - 1996
Bachelor of Science in Computer Engineering from Adamson University, completed from 1991 to 1996.
Tech stack
Software and tools used professionally
Availability
Location
PhilippinesAuthorized to work in
Salary expectations
Social media
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