Systems Engineering is a broad topic and here at Claytex we focus on the modelling and simulation of the system to understand it's behaviour and dynamics. Our work covers multiple industries and domains such as vehicle dynamics, energy management of buildings, flight dynamics of drones, thermal management and extends into the virtual testing of ADAS and autonomous vehicles with physics based sensor models. We help our customers understand their designs to make better products, faster. We are a consultancy, software developer, distributor and training provider. We develop simulation solutions using the open standards of Modelica, FMI, OpenSCENARIO and OpenDRIVE; distribute systems engineering solutions from Dassault Systemes, rFpro and specialist Modelica library developers. Our portfolio of tools includes Dymola, Reqtify, rFpro as well as our own software products including the VeSyMA suite of solutions. We also build bespoke simulation tools for specialist applications. We are active in a number of industries including Automotive, Aerospace, Defence and Energy sectors. Claytex has a number of customers in Motorsport competing in Formula 1, NASCAR and Indycar using solutions developed by us. These teams are using our solutions to model the whole car including the engine, powertrain, and chassis systems and they are deploying these into offline simulation, lapsim applications and driver-in-the-loop simulators. More recently we have been working on the development of simulation solutions to enable the virtual testing, development and training of autonomous vehicles and ADAS features. These solutions are built around rFpro with sensor models and tools for scenario based testing that are developed by Claytex. We also develop Modelica libraries and FMI based solutions. Our range of Modelica application libraries for Dymola are focused on ground and air vehicle simulation. We utilise the FMI standard to enable models to be easily shared.