Overview Own Your Future. Modern Technology Solutions, Inc. (MTSI) is seeking a Principal JSE Electronic Warfare Engineer to join our growing team at Nellis AFB, NV or Edwards AFB, CA. Why is MTSI known as a Great Place to Work? Interesting Work: Our co-workers support some of the most important and critical programs to our national defense and security. Values: Our first core value is that employees come first. We challenge our co-workers to provide the highest level of support and service, an