Who we are

Computational Solutions Staff

The GCB IT staff provides computer support; designs and maintains the storage and computational infrastructure; and executes a broad range of programming projects for individual researchers, groups and core facilities. For computational troubleshooting issues, email gcb-help@duke.edu.


Hilmar Lapp
Director of Informatics

Hilmar leads and manages the informatics team. With dual backgrounds in biology and computer science, he has more than two decades of experience developing informatics tools and resources. He aims to enable more and better science, with interests in reusable and interoperable software and data, large-scale data integration, and building open sustainable eScience infrastructure.




Gregory Steffen
Gregory Steffen
IT Analyst, Systems Administration
Gregory moved to North Carolina from Washington state in 2018 and, prior to the move, worked as an Enterprise Systems Analyst at the University of Idaho for eight years while obtaining his bachelor's degree in ITS. He enjoys IT due to the ever-changing nature of the field of technology, which satisfies his passion for self-directed learning. He is excited to broaden his experience and continue his education on the job by working as a team member for GCB IT at Duke University.



Sr. System Administrator, High-Performance Computing

Dan has 10 years of systems administration experience at Duke, primarily on the Medical Center side. His educational background is in clinical and research ethics, and he spent the early part of his career in the human subject research regulatory arena. Dan joined the GCB Informatics Core in 2014 with the goal of maintaining and improving the Center's Linux infrastructure.

Assistant Director, Informatics R&D

Dan has a decade of experience in informatics software development. He has built tools for analysis and data management in several domains. While tackling computational problems in medical imaging, biology and genomics, Dan likes to explore efficient, open solutions. He loves to find and learn new approaches, and he has an eye for reproducibility and sustainability.


Scientific Applications Programmer

John has fourteen years’ experience as a software engineer. After graduating from the Computer Science Program at the University of Southern Mississippi, John has worked in the medical software industry for many years. He joined the Computational Solutions core 2016.

IT Training & Help Desk Specialist

Rose has many years of working with Help Desk Support. She enjoys helping people live in harmony with their computers. Rose enjoys learning new applications and technologies that we believe will make GCB a better place to work.