The goal of creating the Virtual Environment for Operations and support Process Simulation (VE-OPS) is to incorporate maintenance and logistics design and analysis into the overall design process of a vehicle system, and this paper is the initial effort to establish the environment. VE-OPS enables concept exploration and sensitivity studies for the sustainment of a vehicle. Part of the design process also seeks to quantify the uncertainty in the problem, and Monte Carlo analysis is useful for this. For this, many runs are necessary, and the execution time of the model should be fast. The model is built on an open source platform to avoid potential licensing problems that arise from sharing the code or deploying it on multiple machines. There are many research areas within maintenance and logistics such as inventory management strategies and repair policies, and to cover these areas, the environment needs the flexibility and modularity so that specific segments of the model can be customized to the necessary fidelity. The model should be able to output top level requirements such as mission effectiveness, operational availability, inventory levels and size of the backorder. The description of the VE-OPS components are covered in Section 3, and a simple case study using some of the components is presented in Section 4.