Orthodontic Specialist, Dr Simister
Dr Simister's Family


Orthodontic Certification:
University of Nevada Las Vegas
Creighton University (Nebraska) School of Dentistry

  • Clark County Dental Society
  • Nevada Dental Association
  • American Dental Association
  • Pacific Coast Society of Orthodontics
  • American Association of Orthodontists

Dr. Doug Simister is a Las Vegas Native who graduated from Bonanza High School. He completed dental training at Creighton University (Nebraska). After practicing General Dentistry in the Las Vegas Valley he returned to school and received his certificate in orthodontics from the University of Nevada Las Vegas.

Dr. Simister is a member of the Clark County Dental Society, Nevada Dental Association, American Dental Association, Pacific Coast Society of Orthodontics, the American Association of Orthodontists, and a Diplomate of American Board of Orthodontics.

Dr. Simister and his wife Michelle are the parents of four children…Aubrey, Andrew, Michael, and Elise.

Come on in, or contact us to meet one of the best orthodontics in Las Vegas, Dr Simister.


Dr. Robert Leaver brings to our office his 30 years of experience in Orthodontics in Las Vegas Nv. He is a Las Vegas native who graduated from Rancho High School. He is the proud father of four wonderful children, one of which is a doctor, two are school teachers, and one is a real estate appraiser. On his spare time Dr. Leaver, D.D.S. loves to spend time with his family and grandchildren.


At Simister Orthodontics we combine experience and personality to help make any orthodontic experience more comfortable for you. Come on in and discover how Dr. Leaver and Dr. Simister are some of the best orthodontic specialists in Las Vegas.

Our Office Team


Financial Coordinator

Hi my name is Janiece Carew, I am the Financial Coordinator. I assist the patients with any questions they may have in regards to their financials and I work the front desk. I have been with Simister and Leaver Orthodontics for 5 years. I absolutely love my job and enjoy the relationships we develop with our patients.

A little bit about me, I moved to Las Vegas when I was 15 years old with my family. I bought my first home when I was 25yrs old wahoo! I do not have any children yet, but I have 3 nieces/nephews who I truly love and adore. I also love spending my time with my boyfriend and his son, who make me very happy.


Orthodontic Assistant

Hello, my name is Jessica Rizzuti! I am a mother of five children and a grandmother of one. I have been working as an Orthodontic assistant for 6 years. I absolutely love my family and job. I was born and raised in Las Vegas Nv. I love to help my Doctors create beautiful smiles for the youth and adults in my community.


Treatment Coordinator

Hello, I am the treatment coordinator for our practice, and I am the first voice you hear on the phone when scheduling your initial consultation. I assist new patients during their first exam, and along with the doctor help answer any questions , or address any concerns that you may have regarding your treatment. I take great pride in giving our patients a pleasant first experience at our office. Our whole team strives to make each visit a positive and comfortable one for our patients. I look forward to meeting you soon!

I have three beautiful children whom are the apple of my eye. Bryanna, Christian, and my little one Emma Sophia who keeps me on my toes every day of the week! (and even on weekends)


Insurance Coordinator

As the Insurance Coordinator, I send claims on our patients’ behalf, to their insurance companies to collect any available benefits. I follow up with the insurances’ to ensure they are paying on each case as treatment progresses. I have worked for Dr Simister since 2007. I was born and raised in Las Vegas, and I have three little boys.


Orthodontic Assistant

Hello, my name is Sherry. I have four lively boys and a wonderful husband, who is a proud member of the US Army. I have worked in the field of Orthodontics for 16 years. I do chair side assisting as well as make all the laboratory appliances. I love my job, my family and the Sacramento Kings.


Orthodontic Assistant

Hello, my name is Maggie Diaz. I am an Orthodontic assistant. I have been in the dental field for five years! I’m 22 years Young! I enjoy changing peoples’ smiles into perfect smiles. I am the calm one in this office.


Orthodontic Assistant

Hello, my name is Valeria I work Front Desk. I truly enjoy what I do, especially interacting with our patients and being surrounded by great smiles all day. Outside the practice I enjoy spending time with Family and Friends.


Orthodontic Assistant

Hello my name is Jenniphre. I have been in Orthodontics for 5 years. I love laughing and cracking jokes with our patients, because I strive for a great and fun experience. I consider myself not just an Orthodontic assistant but a “Smile Designer” because my passion is creating a perfect smile. I am usually the goofy and funny one in this amazing office.