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Doctors & Staff

Meet the experienced and friendly doctors and staff who make The Eye Group, SC the leading provider of vision care products and services in Waukesha.

Mark Dagenais O.D.

Dr. Dagenais is a 1998 graduate of Illinois College of Optometry.

He resides in the Lake Country area with his wife and two children. He has proudly served in the United States Air Force and currently in the U.S. Army Reserves. He enjoys fishing, mountain biking, running and spending time with his family. He volunteers as a Boy Scout leader for Troop 12. Dr. Dagenais has served on Wisconsin Optometric Association board for over 8 years.

Marcus Neitzke O.D.

Dr. Neitzke is a 1999 graduate of New England College of Optometry.

He is a native of West Allis and currently resides in New Berlin with his wife and two children. He enjoys mountain biking, running, golf, and spending time with his family. Dr. Neitzke has served as President of the Wisconsin Optometric Association in 2010.

Kristin Brennan O.D.

Dr. Brennan received her undergraduate degree in Mathematics from the University of Rochester, N.Y. She went on to complete her Doctor of Optometry degree from The New England College of Optometry in Boston, MA. Afterwards she completed a primary care/ocular disease residency at the VA Boston Healthcare System- Brockton campus. Dr. Brennan has worked in various clinical settings, but most notably spending 12 years working at the VA hospital in Reno, NV. She has a strong interest in comprehensive eye care and the medical management of ocular disease. Dr. Brennan joined The Eye Group in September of 2019.

Originally from upstate New York, Dr. Brennan resides in Brookfield with her husband and 2 young children. In her free time she enjoys spending time with her family, hiking, biking, and exploring all the outdoor activities that Wisconsin has to offer. Dr. Brennan is a member of the American Optometric Association as well as the Wisconsin Optometric Association.



Shae  serves as our office manager for both our Greenfield and Waukesha locations. Shae is certified Ophthalmic technician for The Eye Group, S.C. She joined the team in June 2004 following the retirement of Dr. Joseph V. Pucci, for whom she had previously worked for since 1992.


Our Waukesha Staff

Cindy: Optician, Peggy: Optician, Rheba: Optician

Pam: Receptionist, Gina: Receptionist, Allaina: Technician, Alison: Asst. Office Manager

Our Greenfield Staff

Alex: Optician, Veronica: Optician, Riley: Technician

Kris: Receptionist, Karen: Receptionist, Lilly: Receptionist, Wendy: Asst. Office Manger