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Board of Trustees

Summit Montessori School is a 501(c)(3) non-profit institution governed by a board of trustees.


Trustees Emeriti

Thom Greenlaw
Michelle Marino

Geoffrey Pierson

Trustee since July 2009

Geoff Pierson is retired and was, most recently, for fourteen years, head of the Packer Collegiate Institute in Brooklyn Heights, New York, and before that director of the American International School in Vienna, Austria.  For the prior twenty years he worked in Brookline, Newton, and Lexington public schools, where he served as assistant superintendent and superintendent.  His undergraduate degree is from Wesleyan, and his MAT and Ed.D from the Harvard Graduate School of Education. Geoff and his wife, Rosemary, also a retired teacher and administrator, have three married children and six grandchildren. 

Krissy Davis, President

Trustee since July 2014

Krissy is a Certified Public Accountant and partner in Deloitte & Touche LLP’s Risk Advisory Services practice.  She has 20 years of experience providing financial and operational risk services to clients in the financial services industry.  Krissy has also been actively involved with the United Way of Massachusetts Bay and Merrimack Valley serving in a number of leadership roles over the last ten years including her current roles as Trustee and Chair of the Community Impact Committee.  She is also on the Board of Directors of Ellis Memorial & Eldredge House which offers early education and childcare programs for children and an adult day program for frail, elderly, and disabled adults.  Krissy has a BS in Business Administration from Stonehill College.  She and her husband, Evan, have two daughters at Summit. 

Josh Grossetti

Trustee since July 2013

Josh has held a number of leadership positions within the Information Technology space, and has over thirteen years of IT experience with project management, procurement and contract management, managerial responsibilities and strategic and tactical planning. Josh graduated from Northeastern University with a BS in Finance and Accounting management.   Josh and his wife, Pamela, live in Wellesley with their two children, one of whom is a Summit student.

George (Geordie) Mitchell

Trustee since July 2017

Geordie is the Director of Enrollment Management and Strategic Initiatives at Buckingham Browne & Nichols (BB&N) School in Cambridge, MA. Geordie's independent school career has encompassed grades PK-12, day and boarding, and spiritual and secular schools.  He began his career in 1982 at Trinity-Pawling School, an all-boys boarding school in New York where he taught, coached, advised, and served as both the Assistant Director of the Capital Campaign and the Director of Admission.  Called back to his roots, Geordie returned to St. Paul’s for 14 years.  During that time, he spent time as the Director of Development and the Director of Admissions while continuing to teach, coach, and advise.  He was the Assistant Head for External Relations at Wilmington Friends School where he oversaw the admissions, development, and communications departments before returning to admissions in his current role at BB&N.  Geordie is a founding board member of the Association of Independent School Admission Professionals and consistent faculty member at the AISAP Institute.  He is a frequent presenter at conferences and workshops around the country on various aspects of enrollment management. Education is the family business as Geordie’s wife, Mary, is a recently retired English teacher; his son is a former admission director; and his daughter is currently the Director of the Upper School at an independent school.

Joyce Nett

Trustee since July 2016

Joyce Nett is a Montessori teacher with certification in Elementary I-II and Secondary I. She is currently the lead middle school teacher at Cambridge Montessori School in Cambridge, Mass. Joyce has published and presented at conferences on bringing children into nature. Before coming to CMS in the fall of 2014, Joyce worked for 12 years at Lexington Montessori School. At LMS, she lead the Upper Elementary program and served on the board.  Joyce was also a parent at LMS, where both of her daughters attended. Joyce has a Bachelor of Arts from Yale University and an Master of Education from Lesley University. Joyce and her husband Bill live in Waltham, where Joyce is active in the community; she served on the board of the Waltham Land Trust for 5 years. Joyce and Bill enjoy traveling and eating!

Kate Salley

Trustee since July 2017

Kate is counsel at Ameresco, Inc., a leading renewable energy and energy services provider headquartered in Framingham. Kate has over 10 years of experience counseling companies on corporate governance, securities and related matters. Kate is an active volunteer for the Bryn Mawr College Alumnae Association, currently serving in roles focused on development, admissions and identifying and evaluating candidates for leadership roles in the Association. Kate received her AB from Bryn Mawr College and her JD from Boston University School of Law. Kate resides in Framingham with her husband, Scott, and her son, Stephen, who attends Summit. Kate serves as the co-Chair of Summit’s Governance committee.

Kingsley "Chip" Norris

Trustee since July 2011

Development Committee Chair

Chip Norris is retired from St. Mark’s School in Southborough where he worked for 32 years primarily as Executive Director of Development and Alumni/ae Relations.  Chip began his career in education as a teacher and then Director of Admission and Director of Development at the Eaglebrook School in Deerfield, MA.  He has a B. A. from Amherst College.  Chip and his wife, Kit an educational consultant in mathematics education, live in Southborough and have two married children and six grandchildren.

Martha Torrence, Head of School

Martha has over 30 years of teaching and administrative experience in Montessori education, including serving as Principal of the Xavier University Montessori Lab School and founding/administering Our Children’s Center in State College, PA. She was most recently the Director of Toddler and Primary Programs at Cambridge Montessori School in Cambridge, MA. Ms. Torrence served on the American Montessori Society Board of Directors for 11 years, serving as Teachers’ Section Chair, on the Executive Committee, and as Board President. Martha is a sought-after teacher trainer and speaker, having presented trainings and conference sessions in 22 states and 5 countries. She has written award-winning articles on her research topic, play. Martha currently serves as Board Vice President for the Montessori Schools of MA.