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Leadership Team

Dr. Ken Wallace

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Dr. Ken Wallace is in his 12th year with Maine Township High School District 207, first as Assistant Superintendent for Curriculum and Instruction and for the past 8 years as Superintendent. While Dr. Wallace was Assistant Superintendent he led improvements in the District’s technology program that included becoming Google’s first K-12 partner and pioneering 1:1 learning.

In 2015, Maine 207 received an International Digital Content and Curriculum Achievement Award from the Center for Digital Education, and was named one of America’s 14 Most Innovative School Systems in April of 2016 by Tech Insider. Dr. Wallace has made teacher leadership and job-embedded professional development a focus. District 207 is perhaps the only U.S. district that includes annual instructional coaching plans for all teachers who work with peer teacher coaches. One of the District’s four coaching paths includes authentic teacher action research, and the District has developed a research consortium with Northwestern, Illinois ASCD, several other universities and local Districts.

An educator for 31 years, Dr. Wallace was a high school English and journalism teacher for five years and taught computer science for six years. He holds B.S. and M.S. degrees from the University of Southern Indiana and Ed.S and Ph.D degrees from Indiana State University. Dr. Wallace was named the 2017 Illinois Association of Career and Technical Education Champion of the year for the District’s innovative work to improve college and career counseling and experiences for every District student.

Mr. Greg Dietz

Assistant Superintendent for General Administration
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Mr. Greg E. Dietz serves as Assistant Superintendent for General Administration, a position he has held since 2005. Mr. Dietz has spent his entire professional career serving District 207 students and staff. Hired in 1988 as a chemistry and physics teacher, Mr. Dietz started his administrative career in 1995 when he became the Department Chairman for Science and later served as the Assistant Principal for Staff and Instruction at Maine South. In 1989, Mr. Dietz was named Teacher of Year at Maine South, an award voted on by both students and staff.

Recently, Mr. Dietz was honored at the 10th Annual State Conference for the Illinois Association of School Personnel Administrators, a state-wide organization that he and a few colleagues founded in 2007. Mr. Dietz’s work as the Assistant Superintendent for General Administration focuses on human resources, collective bargaining, union relations, policy development and staff recruitment. In his spare time, Mr. Dietz enjoys cooking, restoring railroad lanterns, running his eBay business and anything University of Iowa-related…Go Hawkeyes!

Mr. Shawn Messmer

Assistant Superintendent for Curriculum & Innovation
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After starting a career in advertising following his Bachelor’s Degree, Mr. Messmer realized through his work as a basketball coach that his passion resided in helping young people reach their full potential and prepare for a successful school and work life. From there, he taught middle school and high school before serving as an assistant principal for five years at Souderton Area High School in Pennsylvania, his home state. He earned his master’s degree in educational leadership and principal’s certification at Lehigh University.

In 2010, Mr. Messmer became the principal at Maine South. Additionally, he is currently a member of the Midwest Principal’s Center’s Advisory Board, serves as the secretary of the Central Suburban League athletic conference, and is pursuing his doctorate in educational leadership at Concordia University of Chicago. Shawn is a fan of all things Philadelphia and is the proud father of three children.

Ms. Mary Kalou

Assistant Superintendent for Finance
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Ms. Kalou has served as the Assistant Superintendent for Business/CSBO for District 207 since July 2009. She has more than 20 years of experience as a school business official. &After spending several years at a large public accounting firm, Mary began her school district career at District 207 in 1993, serving as the Director of Accounting. She served in that capacity for 5 years. Mary has also served as an Assistant Superintendent for both Arlington Heights School District 25 and Lake Zurich School District 95.

In addition to being a certified public accountant, Mary holds a Bachelor of Arts degree from Loyola University, a Master of Arts degree from Northern Illinois University, an ED. S. from Northern Illinois University and received her Chief School Business Official (CSBO) endorsement from Northern Illinois University.

Ms. Jill Geocaris

Innovative Adult Learning Coordinator
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Mr. Mark Ordonez

Chief Technology Officer
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Mr. Ordonez has worked in education technology in secondary and higher education for nearly two decades. He has served as the Chief Technology Officer for District 207 since June 2017. He has held several positions in the Technology Department since joining District 207 in 2008, most recently holding the position of Director of Information Services. Mark holds a MS in Information Technology from Northwestern University, and a BA in Physics and Computer Science from Illinois Wesleyan University.

Mark believes that technology is a service for the school and that it forms the backbone of all other areas, including curriculum, business, and administration. Through his various positions, Mark has helped create an environment where teachers can innovate and try new, engaging methods of instruction. He also supports data-driven decision making at all levels. He shares these ideals within the District and as a presenter and consultant.

Dr. Mike Pressler

Principal, Maine East High School
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Dr. Pressler is dedicated to a strengths-focused approach to teaching and learning that honors each student’s individual assets and proclivities as the basis for creating relevant and engaging learning experiences. Helping students identify interests and passions and then weaving those into learning experiences at school is central to his personal educational mission.

Dr. Pressler has been a District 207 administrator for 25 years: he has been Principal at Maine East since 2010, following five years as Assistant Principal for Instruction. He earlier served as Fine Arts Department Chair and Director of Bands at Maine South, during which time the department received state and national recognition for exemplary arts education programs. Before coming to Maine 207, he taught at Lyons Township High School, Wichita East High School (KS), and in downstate Carlinville, Illinois. Pressler holds a Doctor of Education in Educational Leadership from National-Louis University, a Master of Science in Music Education from the University of Illinois at Urbana-Champaign, and he graduated magna cum laude with a Bachelor of Music from Fort Hays State University in Hays, Kansas. Additionally he has completed advanced degree course work in public school administration at the University of Illinois at Urbana-Champaign.

Dr. Ben Collins

Principal, Maine South High School
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Dr. Collins is in his first year as Principal at Maine South. Prior to his appointment, he was the Assistant Principal for Teaching and Learning at Maine West. From 2012-2014 he was the Division Coordinator for Fine Arts, CTE, and Physical Education at Batavia High School and the Music Department Chair from 2009-2012. Ben has taught general music and band at Lemont and Batavia High School and has a Bachelor’s and Master’s in Music Education from the University of Illinois, a Master’s in educational leadership from Aurora University and a Doctorate in School Administration and Supervision from Loyola University Chicago.

His research targets teacher evaluation systems design and administrative capacity. He is the co-president for the Illinois Council for Instructional Coaching and a board member of the Music Educators Development Division for ILMEA. He is a frequent presenter on teacher and school leader accountability, instructional coaching, and Arts standards utilization and alignment across the state.