10 Fannie Mae security leaders
Brian Heemsoth, SVP, Chief Security Officer at Fannie Mae, is one of ten Fannie Mae security leaders listed here, alongside people who hold security engineering, threat detection and response, identity management and data protection director roles there. A reader can learn how security leaders work at Fannie Mae from people who have held the role.
Professionals to explore
Brian Heemsoth
LinkedInExperience: SVP, Chief Security Officer · Fannie Mae
Brian Heemsoth has been SVP, Chief Security Officer at Fannie Mae since August 2026. Brian Heemsoth was EVP, Chief Information Security Officer at FIS from 2023 to 2026, EVP, Head of Cyber Defense at Wells Fargo from 2022 to 2023 and SVP, Head of Cyber Defense at Wells Fargo from 2021 to 2022.
Bukky Akinwande
LinkedInExperience: Director Information Security Risk Management · Fannie Mae
Bukky Akinwande has been Director Information Security Risk Management at Fannie Mae since October 2023. Bukky Akinwande was Senior Manger, Information Security Risk Management at Fannie Mae from 2021 to 2023, Technology Risk Manager there from 2020 to 2021 and IT Audit Manager at Fidelity Investments from 2018 to 2020.
Diane Tran
LinkedInExperience: Information Security Director, Data Protection · Fannie Mae
Diane Tran has been Information Security Director, Data Protection at Fannie Mae since November 2021. Diane Tran was Cyber Security Senior Manager, Data Security Engineering at Fannie Mae from 2019 to 2021, Cyber Security Senior Manager, Data Analytics there from 2017 to 2019 and Information Security Senior Manager, Access Management there from 2016 to 2017.
Don D'Souza
LinkedInExperience: Director CyberSecurity engineering - IAM · Fannie Mae
Don D'Souza has been Director CyberSecurity engineering - IAM at Fannie Mae since October 2021 and was Sr. CyberSecurity Manager- Identity management at Fannie Mae from 2014 to 2021. Don D'Souza was Senior Application Architect at the City of Boston from 2008 to 2014.
Justin Leiser
LinkedInExperience: Information Security Enablement Director · Fannie Mae
Justin Leiser has been Information Security Enablement Director at Fannie Mae since March 2024. Justin Leiser was Senior Manager at Capital One from 2022 to 2024, Manager at Potomac Point Group from 2021 to 2022 and Director Lean-Agile Transformation at Fannie Mae from 2018 to 2021.
Matthew Chong
LinkedInExperience: Senior Director- Security Engineering · Fannie Mae
Matthew Chong has been Senior Director- Security Engineering at Fannie Mae since June 2025 and was Senior Director- Security Architecture at Fannie Mae from 2024 to 2025. Matthew Chong was Head of Insider Risk Management and Cyber Investigations at Synchrony from 2022 to 2024 and Vice President | Information Protection at Fifth Third Bank from 2021 to 2022.
Neeti Matharoo
LinkedInExperience: Senior Director, Technology Risk & Product Management · Fannie Mae
Neeti Matharoo has been Senior Director, Technology Risk & Product Management at Fannie Mae since March 2008, according to the listing. The profile describes Neeti Matharoo as the Senior Director of Technology Risk Management within the Information Security organization for Fannie Mae.
Stephen K. Brannon
LinkedInExperience: Senior Director, Information Security Architecture · Fannie Mae
Stephen K. Brannon was Senior Director, Information Security Architecture at Fannie Mae from 2023 to 2025 and Senior Director, Information Security Engineering and Operations at Fannie Mae from 2019 to 2023. Stephen K. Brannon was also Director, Cyber Security (Threat Detection and Response) at Fannie Mae from 2015 to 2020, and has been Chief Information Security Officer (CISO) at ISC (Integrated Specialty Coverages, LLC) since December 2025.
Wendy Granacker
LinkedInExperience: Sr. Director - Enterprise Identity Mgmt and IAM Governance & Metrics · Fannie Mae
Wendy Granacker has been Sr. Director - Enterprise Identity Mgmt and IAM Governance & Metrics at Fannie Mae since September 2025. Wendy Granacker was SVP - Identity & Access Management at Synchrony from 2018 to 2024, VP - Managed Services at Securonix from 2016 to 2018 and Global IT Risk Solutions Leader at GE Capital from 2012 to 2016.
William Racsek
LinkedInExperience: Senior Director - Threat Detection & Response · Fannie Mae
William Racsek has been Senior Director - Threat Detection & Response at Fannie Mae since May 2024 and was Director - Threat Detection & Response at Fannie Mae from 2020 to 2024. William Racsek also held the Fannie Mae title Cyber Incident Response Manager from 2016 to 2024 and was Data & Security Specialist IV at Fannie Mae from 2014 to 2016.
Choose the right perspective
Pick the person whose own security area is closest to your question, since engineering, threat response, identity, data protection and risk management 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 everything seemed urgent?
- 03What did you carry over from earlier roles that changed how you lead security work?
Reaching Fannie Mae 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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