Sandhiya D

Cybersecurity Engineer

LinkedIn

About

Experienced Cybersecurity Engineer with over 10 years of progressive experience, specializing in endpoint security operations, threat detection, and incident response across global enterprise environments. Proficient in managing security platforms like SentinelOne EDR/XDR, Microsoft Defender, and Proofpoint, safeguarding over 50,000 endpoints. Proven ability to streamline incident triage, optimize detection rules, and collaborate cross-functionally to enhance security posture and ensure audit readiness.

Work Experience

Technical Consultant

Codincity Digital Technologies Pvt Ltd | Permanent

Sep 2025 - Present

Chennai, India

I work as a Technical Consultant managing security tools such as Microsoft Defender for Cloud and SentinelOne. I am responsible for maintaining compliance, monitoring risks, and implementing security best practices across environments. My focus is on strengthening the overall security posture and ensuring it consistently remains above 90%.

Lead Administrator

Wipro Technologies

Sep 2021 - Present

Bangalore, Karnataka, IN

Spearheaded L1/L2 security operations for a global enterprise, protecting over 50,000 endpoints through expertise in EDR/XDR, email security, and network security platforms.

  • Provided L1/L2 support for critical security platforms including Microsoft Defender XDR, SentinelOne, Proofpoint, and Palo Alto Firewall/IDS, protecting 50,000+ global endpoints.
  • Streamlined security incident triage and alert response by correlating events from EDR, email security, IDS/IPS, and SIEM tools (Splunk), contributing to effective containment and remediation.
  • Optimized threat detection by implementing and fine-tuning detection rules for Microsoft Defender and SentinelOne, enhancing coverage and policy alignment across diverse environments.
  • Reduced false positive spam detections by 20% for critical user groups by analyzing Proofpoint reports and implementing targeted email routing rules.
  • Developed comprehensive documentation for standard operations, configurations, and troubleshooting, enhancing audit readiness and operational efficiency.

Director - Teacher Trainer

WhiteHat Jr

Mar 2019 - Sep 2021

Remote, Global, US

Directed and developed educational programs for an online coding platform, mentoring a global team of teachers and fostering student engagement across multiple regions.

  • Led over 1,000 engaging 1:1 live online coding classes, fostering significant student involvement and understanding of complex curriculum content.
  • Developed comprehensive training resources and mentored 50+ newly recruited teachers, elevating their instructional proficiency and class delivery effectiveness across diverse regions.
  • Managed and supported a diverse cohort of 200+ students and teachers across US, Australia, Canada, and India, demonstrating exceptional cross-cultural communication and adaptability.
  • Contributed to curriculum content review, feedback, and implementation, driving continuous improvement in educational program quality and student outcomes.

Senior Engineer

CSS corp

Feb 2016 - Sep 2020

Chennai, Tamil Nadu, IN

Managed complex software implementation projects and provided technical triage for Blackboard ICM, ensuring successful deployments and client satisfaction.

  • Streamlined project workflows and coordinated tasks to ensure timely completion of 15+ complex software implementation projects for Blackboard ICM.
  • Collaborated directly with clients to define design specifications and identify optimal solutions, ensuring alignment and effective communication throughout project lifecycles.
  • Facilitated seamless software installation and delivered comprehensive training to 30+ administrators, driving high user adoption rates and system proficiency.
  • Led pre-go-live User Acceptance Testing (UAT) efforts, proactively identifying and resolving critical issues to ensure successful and stable deployments.
  • Managed a high volume of support tickets and coordinated UAT with customers, consistently achieving 95%+ SLA compliance.

Senior Helpdesk Engineer

Disys India Pvt Ltd

Oct 2013 - Feb 2016

Bangalore, Karnataka, IN

Led a 10-member helpdesk team, overseeing performance and providing L1/L2 technical support for hardware, software, and network issues.

  • Managed and mentored a team of 10 helpdesk engineers, improving overall team performance and service delivery by 15%.
  • Resolved a wide range of hardware, software, and network issues for end-users via telephone, email, and chat, reducing average resolution time by 20%.
  • Utilized Incident Management Systems (Remedy Force, Efecte, ServiceNow) to efficiently document and manage 500+ problems and resolutions annually, ensuring comprehensive tracking.
  • Developed and updated 50+ knowledge base articles, enhancing support resources and contributing to a 10% reduction in recurring user issues.

Education

Computer Science

Easwari Engineering College

7.8 GPA

Sep 2006 - Apr 2010

Chennai, Tamil Nadu, IN

Certificates

Postgraduate Program in Cybersecurity

Great Learning

Jul 2025

Microsoft Applied Skills – Defend against cyberthreats with Microsoft Defender XDR

Microsoft

Jul 2025

SentinelOne Security Administrator

SentinelOne via Credly

Jul 2025

SentinelOne Incident Responder

SentinelOne via Credly

Jul 2025

ITIL Foundation (2011 Edition)

Axelos

Jan 2023

Cybersecurity Essentials

Cisco

Jan 2023

C1 Advanced (English Proficiency)

EF SET

Jan 2023

CEFR B2 Level (English Proficiency)

British Council

Jan 2023

Awards

CRS Beyond Boundaries 2024

Wipro Limited

Jan 2024

Awarded for outstanding contribution to cross-regional service excellence.

CRS Highflyer 2023

Wipro Limited

Jan 2023

Recognized for exceptional performance and high-impact delivery in client support operations.

Languages

English (Fluent) , Tamil (Native) , Telugu (Conversational)

Skills

Endpoint Security & EDR/XDR

  • SentinelOne
  • Microsoft Defender for Endpoint
  • Defender XDR
  • Symantec Endpoint Protection (EPP)
  • Agent Deployment
  • Policy Tuning
  • Threat Triage
  • L1/L2 Escalations

Email Security

  • Proofpoint Email Protection
  • Spam Identification
  • Sender Management
  • Policy-Based Email Routing
  • Rule Configuration
  • Filter Tuning

Vulnerability Management & FIM

  • Tenable Nessus
  • Scan Report Analysis
  • Remediation Coordination
  • Compliance Tracking
  • Tripwire
  • Agent Management
  • File Integrity Monitoring

Network Security & IDS/IPS

  • Palo Alto Firewall
  • Security Policy Configuration
  • URL Filtering
  • Traffic Log Review
  • CLI Usage
  • Suricata IDS
  • Rule Tuning
  • Alert Validation
  • Log Correlation

Threat Detection & Incident Response

  • IOC Review
  • Threat Triage
  • Root Cause Analysis
  • Antivirus Log Analysis
  • SIEM (Splunk, Microsoft Sentinel)
  • Wireshark
  • Virus Total
  • Packet Inspection
  • IOC Validation

Operating Systems

  • Windows Server 2012-2019
  • Windows 10
  • Windows 11
  • Linux (Ubuntu, RHEL)

Project Management

  • Task Coordination
  • Deadline Management
  • Client Collaboration
  • User Acceptance Testing (UAT)
  • Stakeholder Communication

Technical Support

  • L1/L2 Support
  • Troubleshooting
  • Remote Desktop Support
  • SLA Compliance
  • Knowledge Base Management

Training & Development

  • Curriculum Development
  • Teacher Training
  • Mentorship
  • Online Education
  • Cross-Cultural Communication
  • Documentation

Security Operations

  • Endpoint Compliance
  • Agent Health
  • Security Coverage
  • Operational Security
  • Incident Response
  • Intune
  • RBAC