Sherin Mathew
@sherinmathew
IT Infrastructure Lead delivering secure, scalable enterprise and OT support—optimizing cloud, identity, networks, and uptime.
IndiaWhat I'm looking for
I’m an IT Infrastructure Lead and OT Support Engineer with 7.8+ years of enterprise experience, delivering scalable, secure, and optimized infrastructure solutions for multinational organizations including Halliburton, Aramco, and ShellSquare Software. As an IT Lead, I deliver Tier-3 support for 500+ global users while sustaining 99.8% uptime across mission-critical environments.
I strengthen identity and collaboration through Microsoft 365 and Entra ID administration, and I optimize enterprise LAN/WAN and security controls (ISO 27001, MFA, segmentation) to reduce security incidents by 87%. I also manage Azure infrastructure and governance—driving a 22% annual cloud cost reduction—while administering 150+ critical VMs with strong backup and disaster recovery readiness aligned to RTO/RPO targets.
Experience
Work history, roles, and key accomplishments
IT Lead
ShellSquare Software Pvt. Ltd.
Oct 2023 - Present (2 years 8 months)
Delivered Tier-3 support for 500+ global users, sustaining 99.8% uptime across mission-critical environments while resolving complex hardware, OS, network, and authentication issues. Led Microsoft 365/Entra ID administration and Azure infrastructure optimization, cutting annual cloud costs by 22% and reducing security incidents by 87% through ISO 27001 controls, MFA, monitoring, and hardening.
Senior Helpdesk Engineer
Mr. Cooper
Mar 2022 - Sep 2023 (1 year 6 months)
Provided L2 support for Microsoft 365 (Exchange Online, Teams, OneDrive), resolving critical end-user issues efficiently. Managed ServiceNow ticketing within SLA and supported remote troubleshooting via RDP/TeamViewer while guiding users through common IT problems.
Senior Assistant Helpdesk Technician
DXC Technology
Aug 2020 - Mar 2022 (1 year 7 months)
Supported Microsoft 365 end-user issues (Outlook, Teams, OneDrive) remotely using RDP and diagnostic tools. Resolved Windows OS, network connectivity, and MS Office Suite problems, escalating complex cases to senior IT teams to improve remote user efficiency.
Technical Support Executive
Subhosting Innovation Pvt. Ltd
Nov 2019 - Jul 2020 (8 months)
Delivered remote support for Windows OS, Microsoft 365, and peripherals, minimizing end-user downtime. Troubleshot connectivity and software/hardware issues using TeamViewer/LogMeIn and assisted with Office 365 (Outlook, OneDrive, Teams, SharePoint) functionality and access.
Technical Support Executive
Phykon Solutions Pvt. Ltd
Jul 2018 - Jul 2019 (1 year)
Provided 24/7 multi-timezone remote support, addressing global customer concerns promptly. Managed device and infrastructure support including Amcrest cameras, VPNs, and NAS systems, and supported users with RDP, Windows OS, and Office 365/productivity tools.
Network Administrator
Sciendev Computer System Pvt. Ltd
May 2017 - Jul 2018 (1 year 2 months)
Configured and installed operating systems to enable seamless system integration and management, while providing remote desktop support to minimize downtime. Performed proactive server health checks and implemented fixes to maintain smooth operations.
Education
Degrees, certifications, and relevant coursework
APTC
Diploma in Computer Engineering, Computer Engineering
2011 - 2014
Completed a Diploma in Computer Engineering at APTC from 2011 to 2014.
Availability
Location
IndiaAuthorized to work in
Job categories
Skills
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