Sudhakar S
Bangalore
Summary
As a CISM-certified professional with strong experience in OT Security, Endpoint Security, Cloud Security knowledge, and IAM, I am committed to achieving success and delivering excellence in security analysis, administration, and professional growth.
Overview
16
16
years of professional experience
Work History
Principal 1- Cyber security & IT Compliance
Alcon
06.2021 - 06.2025
- Strong expertise in the OT domain, with hands-on experience supporting SCADA, DCS, and PLC-connected servers and knowledge of segmentation of zones within the Purdue model.
- Supported and secured SCADA, DCS, and PLC-connected servers, ensuring timely and effective patching to maintain system integrity in our contact lens manufacturing sites across globe.
- Installed, configured, and patched Windows Servers (2016, 2019, 2022, 2025) in OT/PCN environments, collaborating with the patch management team to apply Microsoft security updates.
- Collaborated with Field IT Teams to understand business criticality, adhering to strict change management processes, and coordinating with co-workers to support critical SCADA systems.
- Worked closely with the AWS Cloud team to onboard brownfield EC2 instances, ensuring they were EDR-compliant.
- Implemented and fine-tuned endpoint protection solutions (EDR, AV), managing policy configurations and coordinating exclusions with minimal impact to business operations and OT Domain considering the downtime and Co-maintenance window in mind.
- Understanding of Zero trust model and defence in depth concepts.
- Knowledge of Role-Based Access Control (RBAC) by working with the Active Directory and IAM teams to regularly review and fine-tune access policies, ensuring least privilege and regulatory compliance.
- Led the strategic deployment and administration of Microsoft Defender and FireEye HX across manufacturing environments, successfully managing the transition of 36,000 endpoints from FireEye HX to Microsoft Defender across global regions with zero disruption.
- Automated security agent deployments by packaging agents with the help of the SCCM team and custom scripts, reducing manual IT workload and ensuring timely onboarding of assets.
- Worked closely with cross-functional teams to identify root causes of security incidents, documenting findings in problem tickets and facilitating remediation through the change advisory board.
- Established metrics to drive and report on ITIS-SecTools efficiency (Dashboards).
- ISO 27001 GDPR NIST ISA/IEC 62443 knowledge practices that strengthened the security posture.
- Created knowledge base articles and technical documentation, supporting streamlined operations, faster issue resolution, and better team knowledge sharing.
Assistant Manager - Global Security
Concentrix
09.2018 - 04.2021
- Controlling and managing more than 2,50,000 endpoint assets across various geographical locations.
- Administrated and managed Security Tools (Endpoint Security) FireEye HX.
- Create and implement policies, procedures, training and communication of the new policies and procedures to support these projects.
- Analyzing daily, weekly and monthly reports for Endpoint deployment.
- Configure weekly and monthly appliance backup.
- Working with FE DSE to work on escalated issues by SOC team.
- Trained and Certified on Fire Eye EDR and Email security ETP.
- Security Tools user access provisioning and account creations for new users.
- Working on Fire Eye modules and process documentation.
- Provide recommendations and implement changes to optimize HX performance.
- Carries out extensive root cause analysis with any customer interaction. Identifying problems, reporting and referring to appropriate teams for resolution.
Sr Associate - Information Security
Convergys
09.2013 - 04.2018
- Access management / Internal Client Auditor /Technical T/S.
- Role based access control, Audits - Internal, External Clients and Remote access solutions.
- Provide day-to-day Provisioning and de-provisioning Users Access.
- Create and implement policies, procedures, training and communication of the new policies and procedures to support these projects.
- Performing termination for Convergys users via SharePoint.
- Conducted quarterly audits for user access review with client.
- Coordinating with HR and verify active employee head count /termination the monthly details for all BT New hire, Term and Transfer cases.
- Working with Training team to get CCT and PST start dates monthly basis for new hires.
- Trained and Certified on Fire Eye EDR and Email security ETP.
- Security Tools user access provisioning and account creations for new users.
- Manage and Administer Exchange 2007/2010.
- Creating mailboxes, giving access rights and extending Storage limits.
- Creating distribution lists and permissions on distribution lists.
- Adding Users to the Distribution Group.
- Troubleshooting Mail flow issues.
- Creating rules on outlook.
- Installing and re-configuring outlook profiles on user's systems.
- Resetting user passwords in Active directory.
- Active directory.
- Troubleshoot VPN and VDI related issues.
Analyst
HCL- Google
10.2011 - 09.2013
- Provide day-to-day support and troubleshooting for Google Nexus and Android devices.
- Configure modems and routers for customers.
- Provide day-to-day Provisioning and de-provisioning Users Access.
- Verify the users account and go through the verification process to validate the user.
Sr Customer support associate
Intelenet
08.2009 - 09.2010
- Contact payers in the U.S. to verify claim status for commercial and government (Medicare/Medicaid) companies.
Education
XII -
Steel Plant Matriculation Higher Secondary School
Arakkonam01.2004
CBSE -
Kendriya Vidyalaya INS Rajali
Arakkonam, Tamil Nadu01.2002
BTech - Information Technology
Anna University - College of Engineering Guindy
Skills
- PCN
- ICS
- SCADA
- DCS
- PLC
- Segmentation
- FireWall
- Purdue Model
- Microsoft Defender for Endpoint
- FireEye HX
- AWS
- EC2
- EDR deployment
- CASB
- CSPM
- ISO 27001
- SOX
- HIPAA
- GDPR
- NIST
- ISA IEC 62443
- Active Directory RBAC
- IAM
- SCCM
- GPO
- Windows Server 2012R2
- Windows Server 2016
- Windows Server 2019
- Windows Server 2022
- Windows Server 2025
- Windows 10
- Windows 11
- Service Now
Languages
- English
- Hindi
- Tamil
- Telugu
Disclaimer
I hereby declare that the information given above is true to the best of my knowledge., 06/01/25
Personal Information
- Date of Birth: 02/01/86
- Nationality: Indian
Skills
PCN, ICS, SCADA, DCS, PLC, Segmentation, FireWall, Purdue Model, Microsoft Defender for Endpoint, FireEye HX (Trellix), AWS, EC2, EDR deployment, CASB, CSPM, ISO 27001, SOX, HIPAA, GDPR, NIST, ISA IEC 62443, RBAC, IAM, SCCM, GPO, MCSA, ITIL, CISM, Trellix Certified, Windows Server 2012R2, 2016, 2019, 2022, 2025, Windows 10, 11, Service Now
Timeline
Principal 1- Cyber security & IT Compliance
Alcon
06.2021 - 06.2025
Assistant Manager - Global Security
Concentrix
09.2018 - 04.2021
Sr Associate - Information Security
Convergys
09.2013 - 04.2018
Analyst
HCL- Google
10.2011 - 09.2013
Sr Customer support associate
Intelenet
08.2009 - 09.2010
XII -
Steel Plant Matriculation Higher Secondary School
CBSE -
Kendriya Vidyalaya INS Rajali
BTech - Information Technology
Anna University - College of Engineering Guindy
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