About Us

As your Computational Fluid Dynamics design team, we take design ideas from initial concept to high-performance reality.

TotalSim stands for innovation with more than 100 years of combined design experience.

TotalSim delivers innovative consulting, development, training, installation and support using leading-edge OPEN and commercial tools.


TotalSim's first office location was in the Dublin Entrepreneurial Center (DEC) was originally a partnership between the City of Dublin, OH and Tech Columbus to foster a collaborative environment for small start-up companies. TotalSim then moved to its own office in 2013, but maintains a close relationship with the City of Dublin and is a key partner with the city on expanding the use of their own 100Gig fiber network. TotalSim have dedicated HPC computing space and connect via DublLINK fiber to OARNet, Internet2 and other research networks.

TotalSim started in 2009 with one employee and now has sixteen, thirteen in Ohio and three in their recently opened Pasadena, California office.

TotalSim has several (14+) large memory high-end CPU and graphics workstations as well as 6 HPC compute clusters totaling over 600 cores, with more expansion planned. The current configuration of TotalSim Compute Clusters gives an approximate peak processing of ~16TF with over 4TB of memory. TotalSim also maintains a number of virtual servers for hosting software development and productivity tools and deploying web-based CAE tools.

TotalSim LLC's sister-company TotalSim Ltd is located in Brackley, England.

Ray Leto - President

Ray Leto Cfd Consulting
  • 25+ years in race engineering, aerodynamics, simulation and management in Indy & Champ Car. 
  • 10k+ hrs of wind tunnel and 25 yrs track testing experience

Ray Leto received a BS in Aerospace Engineering from Penn State in 1985 and began his career by working his way up through the motorsports ranks as a mechanic and engineer. Ray worked within racing organizations in many roles including Aerodynamicist, Chief Race Engineer, Technical Director, Team Manager, and General Manager.  

Naethan Eagles - Technical Director

  • 5 years in Aerospace Industry
  • 3 years AdvantageCFD / BAR F1
  • 10+ years Williams F1

Naethan graduated in 1993 with an honors degree in Aeronautical Engineering from City University London. After working in a small R&D firm and then Rolls-Royce PLC, in 1998 Naethan joined Advantage-CFD to work with BAR F1 on their aero development program.

Naethan left ACFD in 2001 to start the CFD Department at the BMW-Williams F1 Team. Over the next ten years he grew the size and scope of the department, placing CFD at the heart of all aero development. Naethan’s experience of successfully taking designs from concept through CFD and wind tunnel testing, to implementation and verification on the actual vehicle gives him a rare combination of advanced modeling skills and practical understanding of racecar development.

In January 2011 Naethan left Williams F1 to join TotalSim LLC allowing him to transfer what he's learned during his time at the 'bleeding edge' of motorsports and design, and bring it to bear on new areas and project types. At TotalSim he ensures that all projects are conducted with the latest and most appropriate methods, and as well to set the technical development direction for the company in general. Naethan is actively involved in day-to-day project work for customers in all sectors. and is a member of several select committees for SAE International; the Truck and Bus Aerodynamics and Fuel Economy Committee, and the both the CFD and Reynolds Number Task Forces.  


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