Krishnan V S

With a Master's in Cybersecurity and 4.5 years of experience delivering infrastructure projects, I position myself as an early-career security engineer. I have a solid foundation in cryptography, network & web, and systems security, with practical experience delivering GRC-aligned controls in Microsoft 365, spanning vulnerability management, identity & access management, and security operations support, including email perimeter hygiene (e.g. DMARC), monitoring, policy enforcement, and supporting phishing simulation exercises.

Infrastructure Engineer at Principal Global Services (GCC for Principal Financial Group) (2020-02 – 2024-08)

• Hardened and administered Microsoft 365 platform (Exchange Online, SharePoint, OneDrive, Teams), implementing MFA, Conditional Access, retention and DLP to meet security and compliance requirements.
• Led multiple M365 migrations (on-prem to hybrid/online and inter-tenant), focusing on secure identity cutover, access control and minimising data loss for mailboxes, SharePoint sites and Teams workspaces.
• Designed and implemented enterprise voice with Microsoft Teams and Numonix IXCloud compliance recording, SME for Avaya IP Telephony, working with telecom providers to meet call-recording, retention and audit obligations.
• Coordinated AV and workspace upgrades (Teams Rooms and multi-OEM setups) to deliver secure, policy-aligned collaboration spaces across offices, working with stakeholders and vendors.
• Built monitoring and reporting with Power BI, Power Platform and Teams CQD to support incident response, usage visibility and capacity planning.
• Automated tenant-wide configuration and policy changes using PowerShell and supported GPO updates to reduce configuration drift and enforce security baselines.
• Supported endpoint platform using SCCM and Intune, contributing to patching, application deployment, device compliance and BYOD policy enforcement.
• Acted as an M365 SME for IT Service Desk and project teams, working in a Scrum-based Agile environment and using ServiceNow, Jira and Confluence for task tracking and cross-team collaboration.

Master of Science in Technology and Design (Cybersecurity) – Singapore University of Technology and Design (2024-09 – 2025-09)

Post Graduate Diploma in IT Infrastructure Systems and Security (PG-DITISS) – Centre for Design of Advanced Computing (CDAC-ACTS) (2019-08 – 2020-02)

Bachelor of Technology in Instrumentation and Control Engineering – Manipal Institute of Technology, MAHE (2015-08 – 2019-05)