Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Assistant Secretary for Research and Technology

In This Section

What We Offer

HASS COE serves as a pivotal hub within the USDOT, concentrating expertise on automation to ensure the safety of highly automated systems. Our mission is to integrate all of the USDOT alongside government, academic, and industry partners to conduct essential research. This collaboration aims to...

Huafeng Yu, Ph.D.

Huafeng Yu, Ph.D. Senior Scientist, HASS COE huafeng.yu@dot.gov

Dr. Huafeng Yu is a Senior Scientist at the USDOT Highly Automated Systems Safety Center of Excellence (HASS COE) specializing in automation, artificial intelligence (AI), and robotics. Previously,...

Sarasina Tuchen

Sarasina Tuchen Senior Scientist, HASS COE (Retired Emeritus)

Sarasina Tuchen was a Senior Scientist at the USDOT Highly Automated Systems Safety Center of Excellence (HASS COE) specializing in advanced aviation technologies, integration, and interoperability....

Steve Sill, P.E., PMP

Steve Sill, P.E., PMPSenior Scientist, HASS COE (Alumni)

Steve Sill was a Senior Scientist at the USDOT Highly Automated Systems Safety Center of Excellence (HASS COE) leading system architectures and standardization activities. Previously, at the USDOT’s Intelligent Transportation...

Eric Raamot

Eric Raamot Senior Strategist, HASS COE (Former)

Eric Raamot was a Senior Strategist at the USDOT Highly Automated Systems Safety Center of Excellence (HASS COE). Previously, he spent 22 years as Chief Technology Officer and Vice President of Engineering at...

Ashley Nylen, PMP

Ashley Nylen, PMP Senior Strategist, HASS COE ashley.nylen@dot.gov

Ashley Nylen is a Senior Strategist for Surface Automation at the USDOT Highly Automated Systems Safety Center of Excellence (HASS COE), providing expertise in automated and emerging technology...

Wassim Najm, Ph.D.

Wassim Najm, Ph.D.Senior Scientist, HASS COE (Former)

Dr. Wassim Najm was a Senior Advisor at the USDOT Highly Automated Systems Safety Center of Excellence (HASS COE) specializing in safety verification and validation of highly automated systems. Previously, Dr. Najm...

Daniel LeMaster, Ph.D.

Daniel LeMaster, Ph.D.Senior Scientist, HASS COEdaniel.lemaster@dot.gov

Dr. Daniel A. LeMaster is the Senior Scientist for Sensors and Perception at the U.S. Department of Transportation’s Highly Automated Systems Safety Center of Excellence (HASS COE). Since joining the USDOT in...

Mubassira Khan, Ph.D.

Mubassira Khan, Ph.D. Senior Scientist, HASS COE mubassira.khan@dot.gov

Dr. Mubassira Khan is a Senior Scientist at the USDOT Highly Automated Systems Safety Center of Excellence (HASS COE) specializing in artificial intelligence (AI), machine learning (ML), and...

Jason JonMichael

Jason JonMichael Senior Strategist, HASS COE jason.jonmichael@dot.gov

Jason JonMichael is a Senior Strategist at the Highly Automated Systems Safety Center of Excellence (HASS COE). Previously, he served as an Assistant Director for the City of Austin, where he...