Leadership

Father Lawrence Lisowski, Pastor

Reverend Father Larry Lisowski is a native of Chicago and a priest of the Archdiocese of Chicago. Cardinal Joseph Bernardin ordained him on May 19, 1984 to serve the people of God. Father Larry loves being a parish priest and has been blessed with a number of assignments that have allowed him to tend to the spiritual needs of those seeking to journey together in the Catholic faith and share in a lifelong relationship with Christ. In July 2014, Fr. Larry answered the call to serve the two parish communities of Immaculate Conception and St. Joseph. He enjoys inviting people to share their gifts and talents to enhance the parishes' life. He is committed to the welcoming spirit present in our worship, prayer, service, and hospitality. For fun, Father Larry enjoys zipping around the city on a scooter or bicycle, or even paddling down a river in a kayak.

Ms. Katie Sullivan, Co-Principal

Ms. Sullivan began her education career by establishing the Prekindergarten program (and earning an NAEYC accreditation) and teaching Pre-K, Second Grade, and Fourth Grade at St. Mark School. In 1998, she moved to Mater Christi School to assume the role of principal. In 2002, she worked alongside Father Pat Lee to reopen Immaculate Conception School and began her 22 year tenure as principal. Ms. Sullivan earned her Bachelor of Early Childhood Education from Bradley University and her Master’s Degree in Educational Administration from Dominican University. Ms. Sullivan is a lifelong learner and regularly participates in professional development programs, including completing graduate-level coursework in management and education through both the Kellogg School of Management at Northwestern University and the School of Education at Harvard University. Ms. Sullivan loves spending time with her family in Chicago and Green Lake, Wisconsin. She enjoys gardening, watching baseball, and playing tennis.

Ms. Margaret Faller, Co-Principal

Ms. Faller’s journey in education began in 2016 when she launched her career in Elementary Education. In 2019, she joined the Immaculate Conception - St. Joseph School community, where she has worn many hats, including Second Grade Teacher, Instructional Coach, Mentor Program Leader, and Interim Principal. Her dedication and leadership culminated in her appointment as Principal in 2024. Ms. Faller holds a Bachelor’s Degree from Saint Mary’s College in Notre Dame, Indiana, and dual Master’s Degrees from DePaul University in Elementary Education and Curriculum Studies and Leadership with a Principal Endorsement. A passionate advocate for lifelong learning, she continues to expand her expertise through leadership coursework at DePaul University. At ICSJ, Ms. Faller finds joy in collaborating with parents, students, and teachers to foster a shared love of learning. Outside of school, she is a dedicated member of ICSJ Parish, cherishes quality time with her husband and extended family in Wisconsin and Missouri, enjoys playing tennis, and takes delight in exploring the vibrant culture and opportunities Chicago has to offer.

Ms. Lauren Laudick, Assistant Principal & Director of Early Childhood

Ms. Laudick possesses a Bachelor’s Degree from Indiana University in Bloomington, IN. With a passion for learning, Ms. Laudick earned a Master’s Degree in Early Childhood Education from DePaul University and an Executive Master’s Degree from King’s College London in International Education, Administration and Policy. Ms. Laudick has taught children from around the world in Pre-K/Kindergarten, First, Second, and Third Grades over the past eight years. Likewise, Ms. Laudick spearheaded an English as an Additional Language Department at a local international school and currently serves on the DePaul University College of Education Advisory Board. Outside of school, Ms. Laudick is an avid reader and enjoys taking dance classes, skiing, and traveling with friends and family.

Ms. Claire Cosgrove, Assistant Principal

Ms. Cosgrove holds a Bachelor’s Degree in Psychology from the University of Notre Dame and a Master’s Degree in Elementary Education from DePaul University. She is originally from the northern suburbs of Chicago. In the seven years she's been at ICSJ School, Ms. Cosgrove has taught various grade levels including Second, Fourth, and Fifth Grades, Middle School Language Arts, Middle School Math, and Middle School Religion. In this, her eighth school year working at ICSJ, she is excited for a great year of partnering with ICSJ students, families, and faculty in her new role as Assistant Principal at the Hill Street Campus. When not working, Ms. Cosgrove enjoys reading, doing yoga, and spending time with family and friends.