ABOUT US Systems Design Engineering Inc. (SDE) is an electrical engineering, design and consulting firm established in 1998 and located in Tempe, Arizona. We are committed to providing timely, accurate and cost effective design services. We accept responsibility for electrical, mechanical, plumbing, fire alarm and fire protection design services and have long standing MPE-Team relationship with engineers that we work with seamlessly as a single team.. SDE's key staff offers over sixty years of combined engineering and design experience. Our company's experience, principal's direct involvement, and uncompromising dedication to serving our clients' needs through superior engineering and designs distinguish us from other engineering firms. SDE Inc. maintains electrical professional engineering licenses for the following states: Arizona California SDE Inc. maintains $2,000,000.00 professional liability and $2,000,000.00 general liability insurances for all projects.