Mission Statement:
To provide technical, diagnostic, and education expertise in the field of sleep and neurological disorders while offering an elevated level of service to our clients.
Headquartered in Mission Viejo, Serenity Sleep and Neurodiagnostics is at the pinnacle peak in the field of sleep and neurological disorder testing.
Julie L. DeWitte, RPSGT, RCP
Clinical Director
Julie oversee's all aspects of the clinical side of the company. She trains all of the new sleep technicians, reviews and scores all polysomnograms (sleep studies) for physician interpretation, and hosts educational seminars to physicians on the field of sleep medicine.

Prior to founding Serenity Diagnostics, Julie has held management and director positions in several major sleep companies. She has always had a passion for medicine and helping people. Julie has also worked many aspects outside of sleep including, Trama Centers, Flight for Life, NICU and PICU. Julie has been on the cutting edge and still leads the industry in progressive sleep diagnostic testing and treatment of sleep apnea in children.

She has received her education in Sleep Diagnostics from The School of Sleep Medicine in Stanford, California and has been a Registered Polysomnographic Technologist for 17 years and a Respiratory Care Provider for 30 years.

Tim Renner
Tim has always been an entrepreneur at heart and has been in sales and marketing for the last 15 years.. Being raised in a small midwest town Tim brings a very hometown management style to Serenity Diagnostics with a modern twist, but always with an outlook he learned from his Grandpa that you only get out of life what you put into it.

Prior to joining Serenity Diagnostics, Tim worked in the cellular technology field where he has been a Sales Account manger for a GPS Time Card based company managing a multi-state and multi-sales channel market. He used to manage a multi-carrier cellular phone store in Orange County. He also worked in Radio Broadcasting for many years and ran a successful mobile DJ business in Kansas.

In his spare time, Tim is very passionate about his family and spending time with his wife and daughter.