The hackathon was held on February 25 and 26 (just before CSE23) in the Van der Valk Hotel Amsterdam, which was close to the CSE23 venue (though participation in the hackathon was independent from participation in the conference). Wolfgang Bangerth (Colorado State University), David Gleich (Purdue University), Dirk Hartmann (Siemens Digital Industries Software), Jeffrey Sachs (Merck), and Jesse van Doren, (Hackathon Op Maat) comprised the Organizing Committee. During the two-round, team-based competition, approximately 150 participants from all over the world tackled a wide variety of industry-based challenges that were provided by six contributing companies: Advanced Micro Devices (AMD), Advanced Semiconductor Materials Lithography (ASML), Amazon Web Services (AWS), KUKA, Institut Roche, and Siemens. br br Members of the winning team of the SIAM Hackathon—which took place just before the 2023 SIAM Conference on Computational Science and Engineering (CSE23) in Amsterdam, the Netherlands—pose after successfully presenting their final pitch on February 26. From left to right: Daniel Fink (challenge organizer from KUKA), Tjeerd Jan Heeringa (University of Twente), Wouter van Harten (Radboud University), Ikrom Akramov (Technical University of Hamburg), and Wil Schilders (Eindhoven University of Technology and Organizing Committee co-chair of CSE23). SIAM photo.br Members of the winning team of the SIAM Hackathon—which took place just before the 2023 SIAM Conference on Computational Science and Engineering (CSE23) in Amsterdam, the Netherlands—pose after successfully presenting their final pitch on February 26. From left to right: Daniel Fink (challenge organizer from KUKA), Tjeerd Jan Heeringa (University of Twente), Wouter van Harten (Radboud University), Ikrom Akramov (Technical University of Hamburg), and Wil Schilders (Eindhoven University of Technology and Organizing Committee co-chair of CSE23). SIAM photo.br In the first round, teams of up to five individuals each worked on one of the challenges and competed with one another to advance to the second round. The six winning teams from the initial round (one for each company’s proposed problem) then vied for the first-place spot.br br Each company submitted a challenge that was specific to its operations, required limited prerequisite knowledge, and was solvable with only a laptop.