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Senior Leaders

Mark Hansen Superintendent

Mark Hansen, Ph.D.

Superintendent of Schools


262.781.3030 x1123

Dr. Mark Hansen has served as Superintendent for the award-winning School District of Elmbrook since 2012. Mark has worked diligently towards his passion of creating systems and leaders that embrace the motto, “Every Student, Every Time, All the Time.” He enjoys watching teaching and learning occur in the classrooms each day and loves witnessing ‘lightbulb’ moments in students when they learn something new or innovatively master a difficult task.

Dr. Hansen earned his doctorate degree in Educational Leadership from Cardinal Stritch University in 2012. His dissertation took an in-depth look at how award-winning principals learn, grow, lead, and the commonalities in their professional development practices. Mark received his Bachelor’s of Science in History from UW-Whitewater in 1993 and completed his Master’s Degree in Educational Leadership at Marian University in 1997.

Prior to his current role, Dr. Hansen served as Chief Academic Officer for the Pewaukee School District; Assistant Superintendent for Curriculum and Instruction at the School District of Waukesha; Principal of Waukesha South High School; Assistant Principal for Waukesha, Brown Deer, and Pewaukee districts; and as a Social Studies teacher for Pewaukee. Over his career, he has been known as an innovator and risk taker including the establishment of two charter schools that emphasize engineering and health care career preparation.

In 2006, Dr. Hansen was named Wisconsin High School Principal of the Year by the Association of Wisconsin School Administrators and was one of three finalists for National Principal of the Year by the National Association of Secondary School Principals. In 2018, Dr. Hansen completed his national superintendent certification through AASA.

Mark and his wife have 2 boys together and his greatest joy is spending time with his family. He also enjoys making time for faith, fitness, and fun!


Mike Sereno

Mike Sereno, Ed.D.

Assistant Superintendent for Teaching & Learning


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Dr. Mike Sereno has served as Assistant Superintendent of Teaching and Learning for Elmbrook Schools since 2019. He works to promote student-centered learning, inclusive practices, a rigorous and aligned curriculum, and high quality teacher and administrator leadership. He leads a talented teaching and learning team that drives change through deployment of best practices, cycles of continuous improvement, and supports school leaders, teachers, and staff as they make student dreams come true. Mike loves working with Elmbrook’s intellectually curious and passionate students, supportive community, and staff that are driven to provide students with authentic and meaningful learning experiences that develop their knowledge, skills, talents and passions.

Dr. Sereno earned his doctorate degree in Educational Leadership and Administration from Edgewood College in 2017. His dissertation was on The Impact of a Personalized Learning Framework on Student Achievement. Mike received his Bachelor’s Degree in Secondary Education and Teaching from the University of Wisconsin - Oshkosh, and completed his Master’s in Educational Administration and Supervision in 2002 from the University of Wisconsin - Madison.

Prior to his role as Assistant Superintendent, Mike served in various leadership positions throughout Elmbrook since 2003 including Director of Secondary Education, Principal of Pilgrim Park Middle School, and Associate Principal of Brookfield Central. In addition to his Elmbrook experiences, Mike has served on the Association of Wisconsin School Administrators (AWSA)’s Professional Development Committee.

Mike and his wife have four daughters who keep their lives interesting. In his free time, he enjoys sports, outdoor activities, movies, and spending time with his family.


Kristin Sobocinski

Kristin Sobocinski

Assistant Superintendent for Business Services


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Kristin Sobocinski began as Assistant Superintendent for Business Services for Elmbrook Schools in July 2016. She directs a talented group of individuals that value the work they do and take pride in serving the Elmbrook schools. Kristin is responsible for a district budget of over $100 million dollars, and enjoys the diversity that each work day brings with it.

Kristin earned her Master’s Degree in Business Administration from University of Missouri- St. Louis in 2000 and a Business Manager Certification from UW-Whitewater in 2004. Kristin received her Bachelor’s Degree in Economics (1995) from the University of Wisconsin.

Prior to Elmbrook, Kristin served as the Director of Business Services for Grafton, Brown Deer, and Greenfield School Districts, giving her a collective 14 years of experience. She has also served as a Marketing Manager for several private businesses around the country.

Kristin has three very active children that occupy a lot of her spare time. When she is able, she enjoys exercise, going for runs, and a good book.


Chris Thompson

Chris Thompson

Chief Strategy Officer


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Chris Thompson has served as the Chief Strategy Officer for the Elmbrook Schools since 2005. He leads a team of talented staff in the areas of Technology and Communications, whose recent work includes the development of a personalized learning technology framework and a robust stakeholder communications system. Chris also guides the development of the District’s Strategy, and was key in the creation of the Strategy Map that focuses the work each school year. Chris enjoys establishing a long-term strategy and successfully executing the vision, particularly in high-impact areas such as personalized learning.

Chris earned his Master’s Degree in Distance Education from the University of Maryland, University College in 2005. Chris received his Bachelor’s Degree from Georgetown University. He currently serves as an adjunct Professor at Milwaukee School of Engineering where he teaches a strategic use of data course.

Prior to Elmbrook, Chris was the Director of Technology at Hartford Union High School for seven years as well as a track and cross country coach. He also worked in Finance and Technology Consulting giving him a diverse set of experiences that he leverages in his current role.

Chris and his wife have four children who add interest, excitement and energy to each and every day. With any spare time, Chris enjoys running and supporting his Hoyas.


Pam Casey
Pam Casey

Director of Human Resources

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Amie Farley
Amie Farley

Director of College, Career, & Life Readiness

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Tanya Fredrich
Tanya Fredrich, Ph.D.

Director of Student Services

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Emily Grieber
Emily Greiber

Director of Continuous Improvement & Elementary Education

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Dr. Bob Hall
Robert Hall, Ph.D.

Executive Director of LAUNCH

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Randy Johnston
Randy Johnston

Director of Facilities


Amy McBain
Amy McBain

Director of Finance

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Cheryl Peil
Cheryl Peil

Director of Food Service

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Dan Scott
Dan Scott

Director of Technology

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Lisa Rettler

Director of Secondary Teaching & Learning

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