10 Tempus AI engineering leaders
A VP of engineering, senior directors of engineering, software engineering and machine learning, and directors of engineering and software engineering are among these Tempus AI engineering leaders. A reader can learn how engineering leaders work at Tempus AI from people who have held the role.
Professionals to explore
Arvind Prasad
LinkedInExperience: Director, Engineering · Tempus AI
Arvind Prasad has been Director, Engineering at Tempus AI since March 2026 and was Senior Engineering Manager at Tempus AI from 2023 to 2026, based in Chicago. Arvind Prasad was Engineering Lead at Tempus AI from 2021 to 2023, Senior Data Engineer from 2019 to 2021 and Data Engineer at Tempus AI from 2018 to 2019.
Donghun Lee
LinkedInExperience: Senior Director, Machine Learning · Tempus AI
Donghun Lee has been Senior Director, Machine Learning at Tempus AI since September 2025, based in New York, and describes work on AI applications towards precision medicine. Donghun Lee was Director of Applied AI Engineering at Paige from 2024 to 2025 and Staff Software Engineer, AI at Paige from 2022 to 2024.
Heling Zhou
LinkedInExperience: Director of Engineering · Tempus AI
Heling Zhou has been Director of Engineering at Tempus AI since March 2025 and was Senior Manager, Engineering at Tempus AI from 2023 to 2025, describing experience designing and implementing data ETL and machine learning systems. Heling Zhou was Director of Data Engineering at Enlitic from 2022 to 2023 and Data Engineer Manager there in 2022.
Isaiah Simpson
LinkedInExperience: Senior Director, Software Engineering · Tempus AI
Isaiah Simpson has been Senior Director, Software Engineering at Tempus AI since February 2024 and was Engineering Director, Core Platform at Tempus AI from 2019 to 2024 and Software Architect there from 2016 to 2019. Isaiah Simpson was Senior Software Engineer at Grubhub from 2012 to 2016.
Mark Vance
LinkedInExperience: Senior Director of Engineering · Tempus AI
Mark Vance has been Senior Director of Engineering at Tempus AI since July 2024, based in Columbus, Ohio. Mark Vance was Vice President Strategic Partnerships at Paradigm Health from 2023 to 2024, Vice President of Technology at Deep Lens from 2018 to 2023 and Senior Vice President, Technology at Signet Accel, Inc. from 2017 to 2018.
Rafael E.
LinkedInExperience: Director Of Engineering · Tempus AI
Rafael E. has been Director Of Engineering at Tempus AI since June 2017, with a headline of Engineering, Sr Director at Tempus AI, based in Chicago. Rafael E. was Sr Data Scientist at GE from 2014 to 2017, Head of Data Science at XSELL Technologies from 2012 to 2014 and Sr. Manager, Application Development at R1 RCM (Accretive Health) from 2008 to 2011.
Thomas Fresneau
LinkedInExperience: Director, Software Engineering · Tempus AI
Thomas Fresneau has been Director, Software Engineering at Tempus AI since September 2025, based in the Greater Tucson Area. Thomas Fresneau was Director Of Engineering at Paige from 2022 to 2025, Senior Engineering Manager at Paige from 2020 to 2022 and Software Development Manager at Bracco from 2012 to 2017.
Thomas Steinmetz
LinkedInExperience: Senior Director of Software Engineering · Tempus AI
Thomas Steinmetz has been Senior Director of Software Engineering at Tempus AI since March 2024 and was Director Of Engineering, Laboratory Systems at Tempus AI from 2017 to 2024, based in the Greater Chicago Area. Thomas Steinmetz was Director of Software Engineering at Performics from 2016 to 2017.
Tony Massery
LinkedInExperience: Senior Director of Engineering · Tempus AI
Tony Massery has been Senior Director of Engineering at Tempus AI since July 2016, with a headline describing the role as Head of AI and ML engineering, based in the Greater Chicago Area. Tony Massery was Technical Lead at Avant from 2015 to 2016 and Software Architect at Allstate from 2012 to 2014.
William Bennett
LinkedInExperience: VP of Engineering · Tempus AI
William Bennett has been VP of Engineering at Tempus AI since February 2023 and was Senior Director Of Engineering at Tempus AI from 2019 to 2023, based in New York. William Bennett was Director of Engineering at Zocdoc from 2016 to 2019 and Director Software Engineering at Getty Images from 2012 to 2016.
Choose the right perspective
Match the person's engineering area, such as core platform software, laboratory systems, data engineering, AI and machine learning or clinical software, to the question you bring. Check each person's start date, since some of these roles began recently.
Questions to take into the conversation
- 01What did you focus on first when you took on your engineering role at Tempus AI?
- 02How do software, data and machine learning engineers coordinate when a new clinical or research product is built?
- 03What has your own work taught you about running software and machine learning systems that support clinical use?
Reaching Tempus AI engineering 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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