10 TransUnion security leaders
Sebastian K., Vice President - Global ISO Program & M&A Information Security at TransUnion, heads this list of ten TransUnion security leaders, who also hold senior director and director roles in cybersecurity, security engineering, insider threat and governance there. A reader can learn how security leaders work at TransUnion from people who have held the role.
Professionals to explore
Chris Knoche
LinkedInExperience: Sr Director, Cloud and Cybersecurity Operations · TransUnion
Chris Knoche has been Sr Director, Cloud and Cybersecurity Operations at TransUnion since December 2021 and was Vice President, IT at Sontiq (A TransUnion Company) from 2016 to 2021. Chris Knoche was Technical Program Manager at EPA | Chesapeake Bay Program from 2011 to 2016 and Manager, Infrastructure & Operations at Deluxe from 2008 to 2011.
Corlette Grobler
LinkedInExperience: Director: Information Security, Risk Management & Governance. · TransUnion
Corlette Grobler has been Director: Information Security, Risk Management & Governance at TransUnion since June 2025. Corlette Grobler was Head: Information and Cybersecurity (CISO) at African Bank from 2019 to 2022 and Chief Information Security Officer - Contract at Deus X Pay from 2023 to 2024.
Ferney Hernandez Cubillos
LinkedInExperience: LATAM Director, InfoSec Risk Management & Governance · TransUnion
Ferney Hernandez Cubillos has been LATAM Director, InfoSec Risk Management & Governance at TransUnion since March 2026 and was LATAM Sr. Manager, InfoSec Risk Management & Governance there from 2021 to 2026. Ferney Hernandez Cubillos was Director de Identidad Digital y Protección de Acceso at Banco Popular Colombia from 2017 to 2021.
Jim St. Ledger
LinkedInExperience: Sr. Director of Global Security Policy and Governance · TransUnion
Jim St. Ledger has been Sr. Director of Global Security Policy and Governance at TransUnion since May 2021 and was Director of Cyber Crime Governance there from 2019 to 2021. Jim St. Ledger was Sr. Manager Fraud Intelligence at Discover from 2017 to 2019 and Senior Lead Consultant, Cyber-Counterintelligence at Booz Allen Hamilton from 2009 to 2017.
John Munson
LinkedInExperience: Sr. Director, Global Insider Threat Program · TransUnion
John Munson has been Sr. Director, Global Insider Threat Program at TransUnion since September 2025. The profile describes John Munson as a cybersecurity leader with deep expertise in insider threat, digital forensics and eDiscovery, and the listing shows no other roles for John Munson.
Lakshmi Prasad Marella
LinkedInExperience: Director of Cyber Security · TransUnion
Lakshmi Prasad Marella has been Director of Cyber Security at TransUnion since March 2023, and the profile says the role leads enterprise-wide initiatives. Lakshmi Prasad Marella was Sr. Manager, Security Monitoring & Incident Response at Neustar, Inc. from 2021 to 2023 and Senior Manager, D&R at Salesforce from 2017 to 2020.
Matthew DeKoker
LinkedInExperience: Director, Security Engineering · TransUnion
Matthew DeKoker has been Director, Security Engineering at TransUnion since March 2026 and was Director, Infrastructure - Engineering and Automation there from 2024 to 2026. At TransUnion, Matthew DeKoker was also Senior Manager, Infrastructure - Engineering and Automation from 2018 to 2024 and Lead Linux Engineer from 2016 to 2018.
Phillip Gonzalez
LinkedInExperience: Senior Director, Global Cybersecurity · TransUnion
Phillip Gonzalez has been Senior Director, Global Cybersecurity at TransUnion since March 2026 and has also held the title Director, Global Application Security there since March 2020. At TransUnion, Phillip Gonzalez was Sr. Manager Global Application Security from 2019 to 2020, and was Manager - Software Security Group at Kohl's from 2016 to 2019.
Praburam Prabaharan
LinkedInExperience: Director of Cyber Security · TransUnion
Praburam Prabaharan has been Director of Cyber Security at TransUnion since January 2025. The profile headline lists SOC, CSIRT, IR, digital forensics and cloud security among Praburam Prabaharan's areas, and the listing shows no other roles for Praburam Prabaharan.
Sebastian K.
LinkedInExperience: Vice President - Global ISO Program & M&A Information Security · TransUnion
Sebastian K. has been Vice President - Global ISO Program & M&A Information Security at TransUnion since January 2022 and was Senior Director (2019 - 2022) - M&A Information Security there from 2019 to 2022. At TransUnion, Sebastian K. was also Director, Information Security - International from 2015 to 2018 and Director - Information Security Program Management from 2010 to 2015.
Choose the right perspective
Pick the person whose own security area is closest to your question, since engineering, insider threat, governance, regional risk work and security operations each give a different view. Check the dates on each role to see how current the experience is.
Questions to take into the conversation
- 01What took most of your time in your current security role, and how did you decide what to handle yourself?
- 02How did you decide which security risks to work on first when several needed attention at once?
- 03What did you learn in earlier roles that changed how you approach your current security work?
Reaching TransUnion security leaders
How can I contact one of these TransUnion security leaders?
Pick one of the 10 people on this page and choose "Book a paid call", or describe your project to find others. You offer a fee for a 15-minute call or a written answer, Instant Expert finds the person's work email and sends the invitation, and they decide whether to accept. The list covers 1 company: TransUnion, based on profile data retrieved on October 20, 2026. Being listed here doesn't mean someone has agreed to take calls.
How much does it cost to reach TransUnion security leaders?
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About this directory
This is a professional research starting point based on business profile data retrieved on . Titles and companies reflect that source snapshot; roles marked former had ended by then. Check the linked profiles for current details. Inclusion does not imply Instant Expert membership or availability.
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