STEM Academy

401 South Military Road Fond du Lac, WI 54935

Meet the Staff

Hello and welcome to our Staff Page! Here you will find staff bios as well as contact information for each staff member. As principal of STEM, I’m proud to work with such a fine team of individuals who have dedicated themselves to this profession. Our teachers have all chosen to embark on a path that requires a great deal of extra work and dedication to their students. Our staff regularly attends professional development around the state and country and also speaks at conferences regularly about what we are doing at STEM.

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Bob Lloyd


Mr. Lloyd has been in education for more than 30 years,  serving as a teacher, principal and superintendent of schools. He grew up in the Fond du lac area and is a fan of all the local sports teams and enjoys traveling to National Parks.

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Cathy Ziegler

Secretary to the Principal

Ms. Ziegler is a resident of Fond du Lac and has been with STEM since August 2021.  She has over 20 years of Secretarial and Administrative Assistant experience, with the majority being in the rail industry.  Ms. Ziegler’s hobbies include cooking, gardening, music, and art. She also loves nature and animals.

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Tony Markon

High School Science & Projects

Mr. Markon joined STEM in the 2018-2019 school as a high school mentor teaching science and math. Mr. Markon has been excited about the process of developing the high school at STEM.  Before STEM, Mr. Markon taught for five years at Ripon High School primarily teaching Chemistry and AP Chemistry.  Mr. Markon went to School at Michigan Technological University where he earned a degree in Pharmaceutical Chemistry before earning his Masters in Education.  As part of his Masters program Mr. Markon was a Peace Corps volunteer in Uganda.  Mr. Markon’s wife is also a chemistry teacher in Oshkosh meaning between the two of them they have heard every chemistry pun possible.  They have two daughters, Claira and Eleanor, who undoubtedly will enter into the Arts.  In his free time Mr. Markon enjoys curling and golfing.

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Todd Hayes

Teacher: Science and Math

Mr. Hayes is a lifelong Fond du Lac-area resident – grew up on a farm in the Lomira school district, and lived in Lomira and FDL after college. His wife and 3 boys all take martial arts classes (and he teaches) at Martial Arts America in Fond du Lac, and they spend a lot of time and the FDL YMCA.

Mr. Hayes earned his finance degree from UW-Whitewater, and worked for National Exchange Bank & Trust for 8 years as a credit analyst. He attended Concordia University’s teacher credentialing program to earn his Business & Information Technology license. He taught at North Fond du Lac, teaching middle and high school business classes for 4 years, and then spent a couple of years as an at-home dad for his boys. Since then, He’s spent 4 years at Moraine Park Technical College as a recruitment and advising specialist and as K12 Partnership Coordinator.

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Jenny Finerty

High School English

Mrs. Finerty is our High School English teacher. She’s been with STEM since 2019 and lives in New London with her husband and three children. Before becoming an English Teacher, Mrs. Finerty was a graphic designer and still holds on to an appreciation for art and the creative process. When there is not actively a book or other reading material in her hands, she may likely be found outside hiking in the summer or snowboarding in the winter.

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Luke Cofax

High School Math

Mr. Cofax is our High School Math teacher and joined the STEM team in the Fall of 2022.

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Adam Grassnickle

High School Social Studies

Mr. Grassnickle is the social studies teacher for our high school students. He is a fourth year teacher and this is his second year at STEM. He brings a wide range of experiences from working outside of education in the government and non-profit sectors and loves sharing his stories. He is an avid student of history that strives everyday to learn new things about the world. Outside of school, he lives in Ripon with his Fiancee and his three year old dachshund Milo. He is so happy to be here at STEM and is looking forward to an amazing year. 

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Katie Scheuers

Middle School Science

Ms. Scheuers is our middle school Science teacher. This will be her 6th year teaching and her first year at STEM. She previously taught at Beaver Dam Middle School and is a graduate of Marian University. Born and raised in the Fond du Lac area, Ms. Scheuers is happy to be back in her hometown. When she is not teaching, she enjoys hiking, gardening, art, cooking and spending time with her pets and family.

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Stephanie Cochrane

Middle School ELA

Miss Cochrane is the Middle School ELA teacher at STEM and has been a part of the team since 2021.  Miss Cochrane has a bachelor’s degree in Middle Childhood through Early Adolescence (1-8th grade) from UW-Oshkosh. Growing up, Miss Cochrane attended the Fond du Lac School District which ultimately influenced her passion. She fell in love with teaching because she had supportive teachers who worked diligently to ensure she was able to reach her full potential. She also has a strong drive to ensure that each and every student has the same opportunity.  When Miss Cochrane is not at school, you can find her at home trying new recipes, hanging out with her pit bull, reading, playing video games, or local events. When the weather permits, she enjoys fishing and going on hiking adventures with her friends.

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Heath Horner

Middle School Math

Mr. Horner is the new math teacher for middle school. He is from Fitchburg, Wisconsin and is a graduate of UW-Oshkosh. He has spent the last 13 years teaching Math, Science, and English in South Korea, then Bangladesh, and finally Singapore. He has a wife and two sons. His eldest son will attend STEM and his youngest will go to Pier. After being away from the US for so long, he is very excited to watch Packer and Badger games again, eat BBQ for dinner regularly, go hunting and fishing, and see snow for the first time in 8 years.

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Shawn Wilcenski

Middle School Social Studies

Mr. Wilcenski is our middle school Social Studies teacher. This is his second year of teaching and first at STEM. Prior to teaching, Mr. Wilcenski worked in the insurance industry. Mr. Wilcenski currently lives in Oshkosh with his wife, two children, dog and two cats. When not at school, he enjoys going to concerts and relaxing with his family.

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Stephanie Harte

Art Teacher

Mrs.Harte is currently our middle and high school art teacher. This is her first year teaching at STEM Academy.  She previously taught for 21 years at Greenville Middle School, Greenville, WI.  Prior to receiving her art education degree at UWO, she also received a BFA with a painting emphasis.  Mrs. Harte  currently lives in Oshkosh with her family.  She looks forward to sharing her passion for the visual arts.When away from school, she enjoys family time, painting, gardening and interacting with nature

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Tyler Samion

Music Teacher

Mr. Samion is our Band / Orchestra teacher. This is his first year teaching and is excited to share his knowledge of music with the students at STEM.

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Nicole Crescio

High School Phy Ed / Health

Ms. Crescio is our High School Phy Ed teacher. This is her first year at STEM and is excited to work with students in teaching them both health and fitness.

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Linda Radtke

Teacher: Spanish

Señora Radtke is our STEM Spanish teacher.  She started the World Language program and has been teaching at STEM for 3 years part-time.  This year she teaches at STEM in the morning and at Sabish in the afternoon. She has been in the district for 5 years.  She grew up in Costa Rica, Argentina, and Ecuador and is excited to teach the language and culture to her students.  Outside of school, she loves to read and watch crime shows.  She also has 7 grandchildren and 4 grand-dogs.

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Thomas Triller

Teacher: German

Mr. Triller is the German teacher at STEM. Before coming to Fond du Lac, he spent most of his twenty-five-year career teaching internationally, in five different countries on three different continents. He is also a Social Studies teacher and has worked extensively for the International Baccalaureate Middle Years Program as the co-author of a Social Studies textbook, as well as an examination author and principal examiner.

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Killian Edwards

Teacher: Special Education (Learning Strategist)

Miss Edwards is our middle school cross-categorical teacher and case manager. Growing up in the Fond du Lac area, Miss Edwards has been with the Fond du Lac school District since 2015, and with STEM since 2018. She has been coaching the Boys and Girls Varsity Tennis Teams for the last 6 years.  Initially, she got her degree in Elementary Education but decided that working with students with needs was her passion, so she went back to school and got her K-12 license in this field. Miss Edwards loves to spend time with her dog Leonard, gardening,  being outside, and relaxing in the sunshine. 

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Jaime Straks

High School Special Education

Mrs. Straks is currently our High School Special Education Teacher. She has been teaching at STEM Academy since 2021, previously as Middle School ELA and Social Studies.  She joined the Fond du Lac School District in 2019 as a 4th grade teacher at Chegwin Elementary.  She began her teaching career in Oshkosh, teaching both elementary and middle school grades for 6 years before transferring to our district.  When she is not teaching, she loves cooking, hiking and photography.  

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Bill Zimmerman


Mr. Zimmerman is our head custodian and has worked in the Fond du Lac School District since 2008. Formerly a custodian at Woodworth, he has joined our team in December 2021. Mr. Zimmerman is dedicated to ensuring that students have a safe, clean facility to learn and grow in. He grew up in Fond du Lac and continues to be a resident of our community.

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Allan VanEgtern


Mr. VanEgetern is our evening custodian and has been with STEM since 2012. He was born and raised in Fond du Lac and enjoys working with staff and students, while ensuring all students have a safe and clean facility to learn and grow in. He can regularly be found engaging with students about their projects and talking about fishing.

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Christine Sesing

School Nurse

Mrs. Sesing is our school nurse and has been with STEM since 2014. Her experiences in the healthcare field are vast and she loves being able to come and work with our students every week! Mrs. Sesing has a caring heart for both students and staff and this shows in how she takes care of everyone in our building.