Family Center for Asthma and Allergic Diseases

Nursing Staff

Mandy Rea

Mandy started working with Dr. Sim the summer of 1996. She resides in Friendswood and when not at work, Mandy loves being outdoors and time with her two sons. She also enjoys volunteering for her church and spending time with family and friends.

Cindy Ledezma

Cindy joined our team in 2019. She lives in Friendswood with her husband and four daughters. She is fluent in English and Spanish . Outside of work, Cindy likes spending time with her family.

Front Office Staff


Dulce is the newest and sweetest addition to our office. Her name literally means "candy" in Spanish. Dulce has been working in the medical industry for 15+ years. She lives in the area with her husband and three kids. In her spare time she enjoys watching Netflix and shopping. She has recently started going on cruises and cannot wait for the next ship to set sail!


Crystal joined the team in the fall of 2023. She resides in Pearland with her husband and two kids. When not at work, you can find her cheering her kids on from the bleachers. In her free time she enjoys reading and hanging out with her family.