CACI is looking for an experienced Simulation Software Engineer to work with NASA's human-rated spacecraft simulations in support of our Nation’s space exploration initiative at NASA / Johnson Space Center in Houston, TX. CACI works in direct collaboration with NASA developing high-fidelity computer simulations related to all aspects of human space flight exploration. This work includes the development, maintenance, and support of the Trick Simulation Framework, a NASA/Open-source framework, developed by CACI, for creating high-fidelity training, and engineering simulations, using time-based physics models. Trick is written in C/C++ and Java and supports both Linux and MacOS computer operating systems. The ideal candidate has strong software design and development skills. This work takes place in a fulfilling, collaborative environment of engineers and computer scientists with diverse educational backgrounds and skill sets, critical to the human space exploration initiative. One learns a lot here.