Faculty and Staff

Rev. Thomas Demse, Pastor
Mrs. Amy Schlegel, Principal

Office Staff
Mrs. Sherry Fritz, Administrative Assistant
Mrs. Kelly Rohrbach, School Secretary
Mrs. Laura Bruno, Communications Specialist

Classroom Teachers

To contact a staff member, please click on the name below.


Ms. Michelle Scheuer

Grade 4

Mrs. Gayle Dahl


Mrs. Katie Hayes

Grade 5

Mrs. Lisa Bayer

Grade 1

Ms. Maeve Holahan

Grade 6

Mrs. Sue Gallo

Grade 2

Ms. Debra Jelich

Grade 7

Mrs. Julie Sostre

Grade 3

Ms. Sarah Wagner

Grade 8

Mrs. Jennifer Herkowski

Mrs. Alice Erlandson, Bookends Director
Mrs. Jaimie Sponder, Librarian

Specialists / Instructional Aides

To contact a staff member, please click on the name below.



K4 Aide

Ms. Anita Rios

Music Specialist

Mrs. Joanne Collins

K5 Aide

Mrs. Lisa Jones

Physical Education & Health Specialist

Mrs. Kim Krause

Grade 4 Aide

Mrs. Mary Jablonowski

Spanish Specialist

Mrs. Itzel Miranda-Cruz

Grade 5 Aide 

Mrs. Marie Gilpatric

Learning Specialist

Mrs. Mona Seidcheck

Grade 7 Aide

Ms. Nancy Huber

Reading Specialist

Mrs. Amy Wabiszewski

Grade 8 Aide

Mrs. Marta Campos

Mrs. Jean Dery, Director of Breakfast and Hot Lunch Program
Mr. Mark Kurzynski, Director of Maintenance

Amy Schlegel, Principal

I am honored to serve as the proud principal of St. Gregory the Great Parish School. I am entering into my third year at St. Greg’s and am grateful to work with an amazing faculty and staff who dedicate themselves to our mission every day.  I attended Mount Mary University for both my undergrad and graduate studies and completed my administrative certification at Concordia University. My husband Jim and I have an 18 year old son who joined the Marines this past summer and a 15 year old daughter who is a sophomore at DSHA. I have over 25 years of experience working in Catholic schools in the Archdiocese of Milwaukee and continue to build upon my strong faith in Catholic education. My personal mission is to motivate, educate, and inspire others to be their best. I am so happy to be a part of the St. Greg’s community.

Sherry Fritz, Administrative Assistant
Hi my name is Sherry Fritz. I am blessed and grateful to be part of St. Gregory the Great Parish School. In 2002 I was hired as the Parish Secretary after 25 years in the travel business.  I enjoyed my job as Parish Secretary and loved meeting and interacting with all of the wonderful parishioners. In the summer of 2003, Fr. Ken Omernick asked me to take the secretary position at the school. I was so excited I practically flew across his desk and accepted! I have never regretted that decision.  While my job has changed over the years and I am now the Administrative Assistant, I still enjoy coming to school every day. I love interacting with all of the students and families.  One of my favorite things to do is to give tours of our wonderful school to prospective families. I get the opportunity to know them and show off our school and parish community.

My husband Bill and I have two wonderful daughters, Amy and Noelle.  We love spending time with our granddaughter, Elena as well as family weekends at our trailer in Waupaca. In my spare time I love to bake, read, sew and scrapbook.

I am always excited to begin a new school year at St. Greg’s and look forward to getting to know our new families better and to see how much the kids have changed and grown over the summer!

Kelly Rohrbach, School Secretary

Hi everyone, my name is Kelly Rohrbach and I have been the St. Gregory the Great School Secretary for the past 6 yrs. Prior to being the school secretary, I was a Licensed Practical Nurse in Pediatrics for 7 years and then a stay at home mom for 10 yrs. My husband and I have been parishioners at St. Greg's for about 15 years now.  We have 3 children. Our oldest son is a freshman at St. Thomas More High School and a St. Greg’s Alum, our daughter is in 7th grade at St. Greg’s and our youngest son is in 3rd grade at St. Greg’s also. For the past 9 years, my husband and I have been involved with many things at St. Greg's. Whether it has been Girl Scout Leader, Cub Scout Leader/Cub Master, Soccer coach, Volleyball coach, Basketball coach, volunteer and parent,  St. Greg's has been our family’s home away from home.  We cherish all the friendships we have made and will continue to make here at St. Greg’s. We are very lucky to be a part of this St. Greg's community.

Laura Bruno, Communications Specialist
Hi my name is Laura Bruno and I have been a part of St. Gregory the Great Parish in several capacities for the past nine years. Whether it has been as a parent, volunteer, school secretary or even a Girl Scout leader, St. Greg’s has truly been my second home. Currently, I am responsible for the school side of the website and Facebook pages as well as the school's newsletter. My husband Henry and our two girls love being a part of the community at St. Greg’s.

Mrs. Katie Hayes, K5

Hello my name is Katie Hayes and I am very excited to join the St. Greg's family as a teacher in K5 this year! Prior to teaching at St. Greg's I taught K5 for ten years at Blessed Savior West. I have a BA in Psychology as well as my teaching certification in Early Childhood Education from UW-Milwaukee. I have been married to my husband, Ryan, for ten years and have two children, Makaia (8yrs) and Noah (6yrs). I believe that learning should be fun and hands-on! I love the excitement that the young learners come to school with in Kindergarten and I am very excited to be a part of this wonderful learning community!

Mrs. Lisa Jones, K5 Instructional Aide

I'm Lisa Jones and it's great to be starting my second year at St. Gregory the Great as an aide in the K5 classroom.  As a child I attended Catholic grade school and high school.  My experience includes working as a classroom aide, special education aide and camp leader, lunchroom supervisor and after school care worker. Prior to that, I spent several years at home with my children and was a legal secretary.  My husband and I have three amazing children and a dog!  Music, piano, reading, plants and knitting are a few of my favorite things.

Ms. Maeve Holahan, Grade 1

Hello, my name is Maeve Holahan and I am very excited to join the St. Gregory the Great community as the 1st grade teacher.  I graduated from St. Norbert College with a degree in Elementary Education and a certification in Early Childhood Education.  I taught Kindergarten at St. Sebastian School in Milwaukee as well as K3 and K4 at the St. Norbert College Children's Center.  I am very excited to be back teaching in Milwaukee and am looking forward to a wonderful school year!

Ms. Debra Jelich, Grade 2

I am delighted and honored to be teaching second grade at St. Gregory the Great Parish School this year! I graduated from the University of Wisconsin-Milwaukee, majoring in Elementary Education. Prior to St. Gregory the Great Parish School, I taught second grade for four years at Blessed Savior East and over twenty years in Milwaukee Public Schools. 

I am the mother of two adult sons, Alex 25 years and Nicholas 19 years. I live in Waukesha and belong to St. Jude the Apostle Parish in Wauwatosa. 

When I am not teaching, I enjoy bike riding along the many beautiful trails in Wisconsin, spending quality time with my family and friends, and traveling.  

"Positive people, learning, living and growing in Christ through faith and service" is evident here at St. Greg's. I truly enjoy being able to share my faith with the students everyday. I am proud to be a part of this amazing school community.  I look forward to a great and exciting school year.

Ms. Sarah Wagner, Grade 3

Hi my name is Sarah Wagner and I'm am very excited to be the 3rd grade teacher here. I graduated from the University of Wisconsin-Milwaukee with a degree in elementary education. I have been blessed with the opportunity to work at St. Gregory the Great for three years. I started as an instructional aide before becoming the 3rd grade teacher. I truly love teaching and being part of such a wonderful community. I look forward to everyday in the classroom!

Gayle Dayle, Grade 4
Hello and welcome to Fourth Grade at St. Gregory the Great Parish School! I am Gayle Dahl. I graduated from UW-Whitewater many years ago with degrees in Elementary and Special Education. I have been teaching in the Archdiocese ever since, for over thirty years now! My teaching career began in Second Grade at St. Adalbert School – I actually taught in my former third grade classroom! This is my 23rd year teaching at St. Greg’s! I love watching the sparkle in children’s eyes when they have discovered something new! I feel blessed not only to work with your children at school, but to take an active role in the faith community my family belongs to also.
When my schoolwork is done, I make time to cook and bake, read, and do counted cross-stitch. I enjoy time spent with family, friends, and travel – both near and far! Weekends can find us driving to Madison for sporting events or to visit our son who is currently attending pharmacy school there.

Mary Jablonowski, Grade 4 Instructional Aide

I am Mary Jablonowski. This is my fifth year as a member of the St. Gregory the Great staff. I am very happy to be the fourth grade instructional aide this year. I received my Bachelor of Arts degree from Marquette University where I majored in elementary education and Spanish.

I enjoy helping students develop various learning styles which will enable them to become more independent workers. I look forward to collaborating with the classroom teacher to provide a positive, faith-filled year of academic, spiritual, and social growth. I am especially excited to help the students become more proficient in reading, math, spelling, and writing as they learn to work individually, in groups, and as a class.

Prior to working at St. Gregory the Great, I taught primary grades in the Milwaukee archdiocese for 17 years. 

My husband, Tom, and I chose Catholic education for our children from elementary school through high school. Two of our children also graduated from Catholic universities. We have three children and three grandchildren. In my free time I enjoy reading, aqua zumba, craft fairs, and fishing. 

Lisa Bayer, Grade 5

My name is Mrs. Lisa Bayer, and I am very blessed to have been part of the St. Gregory the Great staff for the past 22 years. My husband and I have two adult sons, and this fall we will welcome a daughter-in-law into our family. We are also active members of the parish. 

Over the past 22 years, I have had the pleasure of teaching third grade and fifth grade. Fifth grade is a very exciting year of learning, growing, and sharing our faith in Christ. I want all of my students to know that our classroom is a very loving and nurturing environment in which they can grow and become independent problem solvers. In order to become independent problem solvers, my students know that it is OK to make mistakes because that helps us to look at problems in different ways in order to determine a solution. I am a firm believer that communication is an important part of student success, and I look forward to getting to know all of my students and their families.

Marie Gilpatric, Grade 5 Instructional Aide

Hello! My name is Mrs. Marie Gilpatric. I am glad to be starting as the fifth-grade aide at St. Gregory the Great School! I graduated from UW-Stevens Point with a Bachelor of Science majoring in Communications. I was a Youth Minister before moving to Milwaukee’s East Side. Then, I spent six years as an Administrative Assistant and Scottish dancer for fun. I also taught fifth-grade religious education through the East Side Child & Youth Ministry Program.

I am a member of the Cathedral of St. John the Evangelist, where I served on the Pastoral Council and as a volunteer receptionist. I helped out at my children's K3-8 school as a Daisy & Brownie leader, chaperone, reading tutor, and in the Library Media Center. 

I look forward to getting to know the students and staff at St. Gregory the Great and helping the fifth-grade students learn and grow, as I live my faith and share my love for God. 

I am a wife and mother of three children. My oldest daughter is a freshman in college; my son, a junior in high school; and my youngest daughter, a freshman in high school. I enjoy going to their cross country and swim meets and spending time walking, swimming, biking, camping, and reading.

Sue Gallo, Grade 6
Welcome to 6th grade.  I feel so blessed to have the opportunity to teach your child this year!  I believe that all children are a gift from God and that they are all unique and special.  Children all grow and learn in all sorts of different ways.  I look forward to the challenge of helping them learn and blossom into confident independent learners.  I started my teaching career in 1991 with an education degree from Alverno College.  After teaching first grade at St. Florian School, I joined the faculty at St. Greg’s in 1999.  During my spare time, I love to read books, craft, go camping, gardening, spending time entertaining and enjoying time with my family.

Julie Sostre, Grade 7

My name is Julie Sostre and I am thrilled to be the seventh grade homeroom teacher this school year! Prior to my experiences here at St. Gregory the Great, I taught junior high for seven years in the Milwaukee area. I have a Bachelor’s of Science in Education from the University of Wisconsin Oshkosh and a Master’s of Arts in Educational Policy and Leadership from Marquette University. I feel very blessed to be part of this learning community and I am looking forward to a fantastic school year!

Nancy Huber, Grade 7 Instructional Aide

Hi, my name is Nancy Huber, and I am the 7th grade teacher's aide. This is my second year at St. Greg's, and I am really enjoying myself! The students are fun-loving and energetic, the teachers are dedicated, and everyone affiliated with running the school really cares about education. They walk the path of Jesus in their jobs. I am glad to help students learn and grow in their faith here at St. Greg's.

Jennifer Herkowski, Grade 8

Hello!  My name is Jennifer Herkowski.  I am also affectionately known as Mrs. H.  I am super excited to be back for another year at St. Greg's.  I have been at St. Greg's for 8 years now.  During that time I have had the pleasure of teaching the 2nd grade, 5th grade, and 8th grade homerooms.  I look forward to working with all of you and your children throughout the year.

Mrs. Marta Campos, 8th grade Instructional Aide

Hello everyone my name is Marta Campos. This is my first year here at St Greg's as the 8th grade teachers aide.  I am married and have 4 children. 3 of whom attend St Gregs. I am thrilled to be working again after being home with my children the last 8 years.   I cant wait to see what my first year at St Greg's will be like!

Mrs. Joanne Collins, Music Specialist

Hello! My name is Joanne Collins and I feel very blessed to be able to teach Music to all God's children here at St. Gregory the Great School.

My teaching career has always been in Music and I have taught in many places in Michigan, Wisconsin, Illinois,

Ohio,and Kentucky. I intended to retire at the end of the last school year, but felt I still had something in me to share with children. Hopefully we all grow in the love of Music.

NASCAR is probably my favorite sport and Matt Kenseth #20 my favorite driver. I do, however, follow football, baseball, basketball and I'm especially interested in our school's teams. See you at the games?

My husband and I have a four year old Shiz Tsu named Boots. He is always ready to welcome us home.


Kim Krause, Physical Education & Health Specialist

I am honored to be the Physical Education and Health Teacher at St. Gregory the Great Parish School. A graduate of University of Wisconsin-EauClaire with certifications in Physical Education, Health, Elementary Education, Special Education and Adaptive PE. My Master’s Degree is from UW-LaCrosse in Exercise and Sports Science. I have taught in several school districts and enjoy teaching students of all ages including college students where I teach part time at Carroll University and MATC. My free time is spent with my husband and our five kids… and growing family adding in-laws, twin grandbabies and more wedding planning. We love the outdoors, lake life, physical activity and competitions in all sports.

I am very excited to be teaching at such a wonderful school with the most caring and dedicated teachers. I look forward to a great school year!

Itzel Miranda-Cruz, 

Hello my name is Itzel Miranda and I am very excited to join the St. Greg's family as a Spanish teacher! I am a native Spanish speaker and I was born and grew up in Mexico. I believe that education is my vocation. In Mexico, I taught Spanish to no native speakers and English to Spanish speakers, I feel very comfortable being in the educational field.

Right now I'm student at UW- Milwaukee in order to get my Wisconsin certification in world of language in Spanish and ESL.

I have been married to my husband, Jesse, for five years and have one son, Julian (3yrs). I am very excited to be a part of this wonderful learning community!

Mona Seidcheck, Learning Specialist

Hello.   I am Mona Seidcheck.  I am a Learning Specialist at St. Gregory the Great Parish School.  I graduated with a degree in Education in the area of Learning Disabilities from UW - Milwaukee.  I taught in a Learning Disabilities classroom in Milwaukee Public Schools for ten years.  I also was the Learning Disabilities teacher at Greenfield Middle School for five years.  I have been married for 32 years and have two children who also attended St. Greg’s.  I have been a parish member of St. Greg’s for over 20 years.  I love working at St. Gregory the Great Parish School!  In my free time I enjoy reading, listening to music and traveling.

Amy Wabiszewski, Reading Specialist

Hello!  My name is Amy Wabiszewski.  While this is my first year at St. Greg’s, I have been teaching for 7 years in both private and public schools throughout Milwaukee.  I graduated from Cardinal Stritch University twice, once with my Elementary Education degree and again in December 2015 with a Masters in Language and Literacy and a Reading Specialist license.  I have been married for six years, have a daughter who is almost 2, and another child expected next January.  I believe reading is a community effort.  It takes all the people involved in a child’s life to help them become a successful reader.  I am excited to be another one of those people for the students of St. Greg’s and look forward to fostering a love of reading in all students!

Jean Dery, Breakfast and Hot Lunch Program Director

I have been the Lunch Director for 5 years. My family has been members of St. Greg's for 10 years and have had both of my children attend school here.

Alice Erlandson, Bookends Director

My name is Alice Erlandson, and I am delighted to again be part of the staff at St. Gregory the Great Parish School. I graduated from Michigan State University in 1983 with a BA in Education and taught for the next 20 years. My husband and I joined the parish in 1988 and later that same year I was hired as one of St. Greg’s sixth grade teachers. I earned my Masters of Education in 1996 from Cardinal Stritch University and continued to teach full time through the 2002-2003 school year when I decided to take some time off to raise our daughters.  In 2009 I returned to St. Greg’s as an instructional aide and had the opportunity to work with some wonderful teachers. In 2015 I became the director of Bookends, St. Greg’s before- and after-school program.

My husband and I are both from Michigan, so St. Greg’s has been our family and now is family to our daughters as well. All three of our daughters attend or have attended St. Greg’s. Our youngest daughter is currently in 8th grade. Our oldest two graduated from 8th grade in 2011 and 2016. We enjoy the many different opportunities available to our family through the school and parish, and cherish the lifelong friendships we have made here.

I have enjoyed many roles at St. Greg’s, including sixth grade classroom teacher, parent volunteer, school committee member, Girl Scout leader and coordinator, substitute teacher, instructional aide, and Bookends director. I love that I have made so many connections with parents and students over the years. One thing that brings particular delight is to run into my former students at church, the Festival, around town or even bringing their children to attend St. Greg’s. I love to hear what they have been doing since we last saw one another and to reminisce about Africa projects, read alouds, and prepositions!

Georgia Wendorf, Bookends

My name is Georgia Wendorf, but more commonly known at St. Greg's as Mrs. G. I have been at St. Greg's since 2003. In the past 14 years, I have had many positions here. My current role is supervision for the lunch period for K-4 and K-5, both morning and lunch recess duty for all grades, and a staff worker for our after school program called "Bookends"

I have been working in the school setting since 1988, working my first 13 years in food service, and in 2001 began working as a general teaching assistant for Milwaukee Public Schools. In 2002, I was laid off from Milwaukee Public Schools and found a position in 2003 at St. Greg's.

In 2005, I completed certification in Early Childhood education from Work and Family Consulting and now center my work focus on early childhood.

I have truly been blessed to have found St. Greg's and I love interacting and working with all the children here. My job brings me great satisfaction and I look forward to each new year!

When I'm not at St. Greg's I fill my time with my 6 grandchildren, gardening, scrape-booking, reading, travel and music, being a professional musician since 1992.

Jaimie Sponder, Librarian

Hello.  I am Jaimie Sponder.  This is my third year as the school librarian.  Up until then, I was a stay at home mom for 14 years. 

I was baptized at St Greg's as a baby and my family has been a part of the St. Greg's school community for 9 years. I have three daughters Emily, Kaylee and Zoey currently enrolled here.  I also have two adult children, one who is married and living in Hawaii.  I love the many roles I play here, whether it's a Girl Scout Leader, Volleyball Coach, parent volunteer or Librarian.  St Greg's is home for my family. Look for me and say hello at the Spaghetti Dinner, Boo Bash, Festival or many other events at St Greg's as my family loves to support our great school.