OUR TEAM

We are so proud of our team at Sigma Eyehealth Centers!  From our optometric assistants who are a vital part of ensuring you receive nothing but the best eyehealth care to our opticians who truly enjoy helping you select the perfect frame and lenses to our administrative team members who keep the offices running smoothly and do all that they can to assist you with the “paperwork” side of your eyecare, our entire team works to make your visit to our offices a positive experience.  We invite you to learn a little more about each of these outstanding individuals and what they like about working at Sigma!

Allison Gruwell

Optometric Assistant

Joined the Sigma Team in August, 2022.

April Zimmerman

Optometric Assistant

Joined the Sigma Team in July, 2015

“I truly enjoy working with all of the patients in each office and helping them meet their expectations for their eye care needs. It is also a great pleasure to work with such a terrific team at Sigma Eyehealth Centers.”

April enjoys spending time with her kids and going to music concerts when she is not at work. She also attends numerous fire department activities with her husband, Brody, who is a volunteer firefighter on two different fire departments.

Beth Welsch

Office Administrator

Joined the Sigma Team in February, 1989

“I consider myself very lucky to have joined the Sigma team almost 30 years ago. I enjoy the patients and take pride in knowing we provide them with excellent healthcare and the latest in technology.”

Beth has been a lifelong resident of Monticello. She and her husband, Chuck, raised both of their children, Ben and Kaci, in Monticello. In her free time Beth enjoys playing cards/games with family and friends, working as a licensed wildlife rehabber, and spending time outdoors. More than anything else, though, she loves being “Nana” to her grandson, Declan.

Desirae Martinez

Optometric Assistant

Joined the Sigma Team in July, 2021

Emily Martensen

Patient Services Coordinator

Joined the Sigma Team in July, 2021.

Heidi Driscoll

Optometric Assistant

Joined the Sigma Team in June, 2020.

"Working with the staff at Sigma has been such a learning experience. They have not only shared all of their knowledge, but they are also a fun group to work with! I also enjoy interacting with patients while assisting them with all of their eyehealth needs."

Heidi and her husband are avid Hawkeye football fans. They also love to spend time with their daughter, and in their free time, they enjoy "flipping houses" together.

Lee Ann Krapfl

Optometric Assistant

Joined the Sigma Team in September, 2021.

Rose VerCande

Optician

Joined the Sigma Team in January, 2022.

Sal Ortiz, ABOC

Optician

Joined the Sigma Team in March, 2019

Selina Howard-Grant

Office Coordinator

Joined the Sigma Team in August, 2016

“There are several reasons I love working at Sigma -- no two days are the same, we have some of the best patients who I enjoy getting to know and helping out, and the staff are such a fun and knowledgeable group of individuals.”

When Selina is not working, she loves being on the farm, reading, and spending as much time as possible with her husband, family, and friends.

Vicki Hein, CPO

Optician

Joined the Sigma Team in September, 1984

“The best part of working at Sigma is working with the patients and helping them meet their eye care needs.”

Outside of Sigma, Vicki enjoys reading, going for walks and spending time with friends.