The Team

Jon Mirtschin – Director

Director on the Board, BuildingSMART Australasia

Jon is the director and founder of Geometry Gym and champions the development and support of the GeometryGym tools and services. His vast experience and knowledge of OpenBIM workflows has led to appointment as a director on the Board of BuildingSMART Australasia.


Jon Mirtschin was born and raised on a farm near the coast in South West Victoria, Australia and later studied a double degree in Engineering and Computer Science at the University of Melbourne.

After joining Connell Wagner (Now Aurecon) as a graduate structural Engineer he spent the best part of four years working on a number of high profile projects including, the 300m tall Eureka Tower, the Melbourne Cricket Ground Northern Stand Redevelopment (MCG) and Wembley Stadium in London. These projects challenged himself and the design teams with geometry, structure and function.

In 2005, Jon decided to leave for London and was provided an exciting opportunity at Expedition Engineering. The complexity of projects and work challenged him to tap into his Computer Science degree and was encouraged use it to his and the companies full advantage. This led to the introduction to the wonderful design world of Rhino3d.

Jon pushed these skills to help deliver projects utilizing complex structures and forms, including Infinity Bridge, the 2012 Velodrome and 55 Baker Street (the first two winning IStructE supreme engineering awards).

It was these projects that formed the basis for developing OpenBIM tools and plugins to help engineers and architects all over the world and they are proving to be of great value to the designers on many projects.

Nathan Luke

Nathan joined GeometryGym in late 2018 after 8 years as a structural engineering consultant. Nathan is apart of the software development, training, support and sales teams and predominately focuses on tools development and supporting engineering clients.

Key Skills:

Computational/Parametric Design Workflows, Optimization and rationalization of Complex Structures, Automated Fabrication and drawing production within Grasshopper and RhinoCommon. Coding in C# and Python.


After growing up in a small country town in north west of Victoria, Australia Nathan completed a degree in Civil and Infrastructure Engineering at RMIT University, Melbourne. 

As a graduate structural engineer at Aurecon in Melbourne, Nathan was involved in a diverse range of projects both locally and internationally including the Margaret Court Arena development which he saw from concept, through detailed design and completion focusing mostly on the complex fixed and moving roof. Other projects included the digital tower of Perths new Yagan Square development and Simmonds Stadium Stage 4 roof design where the analysis and Revit model were completely generated through Rhino3d and Grasshopper using the GeometryGym toolset. 

In 2016 Nathan moved to the UK and worked with BuroHappold in London as Senior Structural Engineer. In the two years spent at BuroHappold he worked on the design and documentation of the Qatar Foundation Stadium tension net roof structure for the 2022 world cup and and a 15-story residential tower situated adjacent to Wembley Park stadium. On both projects he worked closely with the computational teams to drive computational processes.

Scott Beazley

Scott joined Geometry Gym in early 2019 as a specialist openBIM consultant and helps business and government on the implementation of openBIM workflows. Scott can help clients realise the full potential of Ifc with high levels of practical application experience within design, cost estimating, construction and hand over. This also includes the linking of classification systems and integration with 4D and 5D applications such as Navisworks, Solibri and ATLAS.

Key Skills:

BIM Model checking and validation, IFC mapping, Revit export and import of IFC, linking of 3D models with 4D time and 5D costs


After completing a Bachelor or Architecture at the University of Sydney Scott has over 35 years of experience practicing in Architecture and 28 years in CAD-BIM teaching at university and technical colleges. For the past 6 years, as well as his university commitments Scott has worked as a digital technology manager for a leading quantity surveyor helping with validation of models for quantification to derive costs.