Current appointments

Assistant Professor
2020 - now

Department of Computer Science - Utah State University, USA

Utah State University

Staff Scientist
2020 - now

Scientific Computing and Imaging Institue

Center for Extreme Data Management Analysis and Visualization (CEDMAV) - University of Utah, USA

SCI Institute   CEDMAV

2019 - now

Data Intensive Science (nonprofit 501c3), USA


Previous appointments

PostDoctoral Fellow
2017 - 2020

Scientific Computing and Imaging Institue

Center for Extreme Data Management Analysis and Visualization (CEDMAV) - University of Utah, USA

System Analyst
2013 - 2015

Product Innovation & Advanced EW Solutions - Elettronica SpA, Italy

Software Engineer
2012 - 2013

High Tech Defence/Aerospace division - Capgemini SpA, Italy

Web developer
2006 - 2012

Freelancer, Italy



PhD Computer Science

University of Rome "Tor Vergata", Italy

Thesis: Combining Scalability Portability and Usability in Big Data Analytics

MS Computer Engineering

University of Rome "Tor Vergata", Italy

Thesis: Distributed Traffic Analysis Attacks to Network Centric Critical Systems.

BE Computer Engineering

University of Rome "Tor Vergata", Italy

Thesis: Automatic system for ontology population via web page semantic analysis.

Visiting Scholar

Visiting Scholar

Scientific Computing and Imaging Institue - University of Utah, USA

Visiting Scholar

King Abdullah University of Science and Technology (KAUST), Saudi Arabia


High Performance Computing

Large scale data analysis, dynamic runtime systems, in situ analytics, parallel I/O.

Scientific Visualization

Visual analytics, feature extraction and tracking, topological analysis.

Selected Publications

Investigating the effect of grain structure on compressive response of open-cell metal foam using high-fidelity crystal-plasticity modeling
Dongfang Zhao, Kristoffer E Matheson, Brian R Phung, Steve Petruzza, Michael W Czabaj, Ashley D Spear.
Elsevier - Materials Science and Engineering: A, 2021   PDF
Distributed merge forest: a new fast and scalable approach for topological analysis at scale
Xuan Huang, Pavol Klacansky, Steve Petruzza, Attila Gyulassy, Peer-Timo Bremer, Valerio Pascucci.
ACM International Conference on Supercomputing (ICS), 2021.   PDF
Adaptive Spatially Aware I/O for Multiresolution Particle Data Layouts
Will Usher, Xuan Huang, Steve Petruzza, Sidharth Kumar, Stuart R. Slattery, Sam T. Reeve, Feng Wang, Chris R. Johnson, and Valerio Pascucci.
IEEE International Parallel & Distributed Processing Symposium (IPDPS), 2021.   PDF
Improving the Usability of Virtual Reality Neuron Tracing with Topological Elements
Torin McDonald, Will Usher, Nate Morrical, Attila Gyulassy, Steve Petruzza, Frederick Federer, Alessandra Angelucci, and Valerio Pascucci.
IEEE Transactions on Visualization and Computer Graphics, 2020.   PDF
High-throughput feature extraction for measuring attributes of deforming open-cell foams.
Steve Petruzza, Attila Gyulassy, Samuel Leventhal, John J Baglino, Michael Czabaj, Ashley D Spear, and Valerio Pascucci.
IEEE Transactions on Visualization and Computer Graphics, 2019.   PDF
Babelflow: An embedded domain specific language for parallel analysis and visualization.
Steve Petruzza, Sean Treichler, Valerio Pascucci, and Peer-Timo Bremer.
Proceedings of IEEE International Parallel and Distributed Processing Symposium 2018, IPDPS ’18, 2018.   PDF
Toward an exascale volume visualization system. In Eurographics Symposium on Parallel Graphics and Visualization.
Qi Wu, Will Usher, Steve Petruzza, Sidharth Kumar, Feng Wang, Ingo Wald, Valerio Pascucci, and Charles D Hansen.
Proceedings of Eurographics Symposium on Parallel Graphics and Visualization. The Eurographics Association, 2018.   PDF
Scalable data management of the uintah simulation framework for next-generation engineering problems with radiation.
Sidharth Kumar, Alan Humphrey, Will Usher, Steve Petruzza, Brad Peterson, John A Schmidt, Derek Harris, Ben Isaac, Jeremy Thornock, Todd Harman, et al.
Proceedings of Asian Conference on Supercomputing Frontiers, pages 219–240. Springer, 2018.   PDF
ISAVS: Interactive scalable analysis and visualization system.
Steve Petruzza, Aniketh Venkat, Attila Gyulassy, Giorgio Scorzelli, Frederick Federer, Alessandra Angelucci, Valerio Pascucci, and Peer-Timo Bremer.
Proceedings of SIGGRAPH Asia 2017 Symposium on Visualization, SA ’17, pages 18:1– 18:8, New York, NY, USA, 2017.   PDF
Reducing network congestion and synchronization overhead during aggregation of hierarchical data.
Sidharth Kumar, Duong Hoang, Steve Petruzza, John Edwards and Valerio Pascucci.
Proceedings of IEEE 24th International Conference on High Performance Computing (HiPC), pages 223–232, Dec 2017.   PDF
In-staging data placement for asynchronous coupling of task-based scientific workflows.
Qian Sun, Melissa Romanus, Tong Jin, Hongfeng Yu, Peer-Timo Bremer, Steve Petruzza, Scott Klasky, and Manish Parashar.
Proceedings of International Workshop on Extreme Scale Programming Models and Middleware (ESPM2) (held jointly with Supercomputing 2016), pages 2–9. IEEE, 2016.   PDF

Computing Elevated Lab

Active Projects

Heterogeneous Parallel I/O
The project focuses on improving parallel I/O performance using heterogeneous computing systems (e.g., GPU) and memory hierarchies.
Looking for PhD students
For more information contact me via email

Edge computing research
In this project we develop real time software for small Unmanned Aerial Systems (sUAS) leveraging advanced data streaming and reduction techniques, image processing, and computer vision.
Students: Ethan Payne, Ryan Goodman. Publications: [1]
Smart HPC
The project focuses on use of machine learning to improve HPC and scientific visualization applications.
Looking for PhD students
For more information contact me via email

Explainable AI
The project focuses on use of visualization to explore and understand AI models using scientific data.
Students: Shubham Gupta.
Use of WebGPU for scientific visualization
Students: Pravin Paudel.

Other Projects

OpenVisus framework
Open source frameworks for large scale scientific data analysis and visualization. Applications in several domains including: neuroscience, material science, combustion and climate simulations, precision agriculture.
Collaborators: University of Utah, University of Alabama at Birmingham
https://www.visus.org https://www.visoar.net
Lightweight in-situ visualization and analysis infrastructure for multi-physics HPC simulations. Part of Department of Energy’s Exascale Computing Project (ECP).
Collaborators: University of Utah, Lawrence Livermore National Lab, University of Oregon, Lawrence Berkeley National Lab, Kitware Inc.
NSF Cyberinfrastructure Center of Excellence (CiCOE) Pilot (now CI-Compass)
Leadership, expertise, and active support to NSF Major Facilities cyberinfrastructure.
Collaborators: University of Southern California, University of North Carolina at Chapel Hill, University of Notre Dame, University of Utah, Indiana University
https://cicoe-pilot.org https://ci-compass.org
Interactive Analysis and Visualization of Large Scale Airborne Observatory Platform Data
Cyberinfrastructure for interactive visualization of Large scale Airborne Observatory Platform image data. This infrastructure has been also used by University of Florida to present their deep learning analysis results on these data.
Collaborators: National Ecology Observatory Network (NEON), University of Utah, University of Florida
https://data.neonscience.org/data-products/DP3.30010.001#visualizations http://tree.westus.cloudapp.azure.com/trees/
Distributed Resources for the Earth System Grid Advanced Management (DREAM)
Next-generation ESGF (Earth System Grid Federation) architecture for managing and accessing data and services resources on a distributed and scalable environment.
Collaborators: NASA Goddard Space Flight Center, NASA Jet Propulsion Laboratory, Lawrence Livermore National Laboratory, Princeton University, University of Utah
https://esgf.llnl.gov https://www.youtube.com/watch?v=S4s1neB9FJs


Other fun stuff