Clinical

Clinical

Kathy Matzke, RPSGT

Sleep Technologist

Kathy discovered sleep medicine in 1988 while working as hospital night-shift respiratory therapist in a newly established sleep Lab. She found Sleep Medicine to be fascinating and spent all of her free time peering over the shoulder of the sleep tech on duty. Kathy became a credentialed sleep technologist and even after all these years, she is still amazed to see a patient stop breathing again and again throughout the night, and have no idea it’s happening. Kathy finds it gratifying to know that in the course of one night, a huge difference can be made in a patients sleep and quality of life.



Renee Chaffin, RPSGT

Sleep Technologist

Renee has worked in sleep medicine for 11 years. She is passionate about making patients comfortable with the sleep test procedure. At MCSD, she appreciates being part of a professional, caring and knowledgeable team.












Monty Bushnaq, RPSGT

Sleep Technologist

Monty was introduced to the sleep medicine field in 2003, working part time as a Sleep Technician in different sleep centers throughout southern suburbs of Chicago. He became a Registered Sleep Technologist in October 2015. He also has a BS degree from Iowa State University.

He enjoys working in the Sleep Medicine field because it is very rewarding to know that you can be part of changing your patients’ lives by helping them sleep better. Monty strives every day to meet the very high standards and expectations for the Sleep Technologists at MCSD; always learning something new with each patient.

Julie Aria, RPSGT

Sleep Technologist

Julie has been involved in the medical field since 2005, with a recent focus on sleep medicine.  She is a graduate from the Oregon Institute of Technology, majoring in polysomnography.  She loves working with patients and helping educate them on the importance of good quality sleep.  The improvements to people’s lives from achieving quality sleep is one of the greatest rewards with working at MCSD.



Oscar Venegas, RPSGT

Sleep Technologist 

Oscar entered the Sleep Medicine program back in 2008.  He was fortunate to finish the program, get board certified, and do his clinical work at Northwestern Memorial Hospital, where he was eventually hired.  He currently works at University of Chicago and Midwest Center for Sleep Disorders.  Oscar is passionate about his rewarding career path and looks forward to new and innovative therapies that are beneficial to patient care and overall health.

Lisa Nicole Grills, PSGT

Sleep Technician

With a passion for taking care of people, Lisa pursued a career in Sleep Medicine.  She graduated in 2015 from College of DuPage’s Polysomnography Program and is now helping patients get on the right track of healthy sleep and feeling better. She loves working one-on- one with patients and making a positive difference in their lives.  MCSD has given Lisa the incredible opportunity for living her passion of providing patient care.


Brandon Exconde, PSGT

Sleep Technician

Brandon has always wanted to help people; no matter what task, as long he is helping someone, he is happy. When his dad was diagnosed with sleep apnea, he realized he could be helping people sleep better; with the same results his father experienced.  Brandon happily sacrifices his sleep, so others can.



Donna Delin, PSGT

Sleep Technician

Donna has been a sleep tech for since 2005, but has always been intrigued by the subject.  She truly enjoys working with patients as well as the other technicians.  With her 11+ year’s experience, Donna credits Midwest Center for Sleep Disorders with having a unique advantage from its caring staff of sleep technicians.



Michelle Otto, RPSGT

Technical Coordinator

Michelle has nearly 30 years of experience in the medical field, half of which are in the Sleep Medicine.  She is passionate about delivering excellent, as well as compassionate, service to patients. Michelle believes one of the best ways to be an advocate for patients is to share her knowledge with them and educate them on ways to attain quality sleep; finding her work at MCSD very rewarding.