About A-S

Head of School Elect

Head of School Elect - Duncan Lyon

Dear Allen-Stevenson Community,

We are pleased to announce that Duncan Lyon will join Allen-Stevenson as the 8th Head of School on July 1, 2022. The Board of Trustees voted unanimously to appoint him after the enthusiastic and unanimous recommendation by the Search Committee.

Duncan Lyon is currently in his 11th year as Head of School at The Carey School, a leading 93-year-old Pre-K to 5th Grade independent school of 272 students in San Mateo, California. Having attended an all-boys school during his own early education, Mr. Lyon appreciates the value of single-gender learning environments. He has broad and deep educational experience across all grade levels.

Allen-Stevenson’s Next Head of School, Duncan Lyon

A native Californian who attended Cathedral School for Boys for his early education, Duncan Lyon began his teaching career at his high school alma mater, the highly regarded San Francisco University High School, where he coached basketball, worked on the admissions committee, taught history, and served as a senior dean for eight years. He then moved to New York to work at Dalton, where he taught history, was the assistant high school director, and, for a year, assistant to the school’s chief financial officer. In 2004 he returned to the Bay Area to become the Middle School Director at Bentley School in Berkeley, ultimately being promoted to the role of Assistant Head of School and managing the K-8 campus of the two-campus K-12 school of 700 students.
During the past 11 years as the Head of School at The Carey School, Mr. Lyon has established a strong partnership among faculty, students, parents, alumni and the Board of Trustees. He completed two capital projects on time and on budget and led two strategic planning processes. Enrollment under his leadership has increased by 10%. He has also implemented an effective faculty growth and evaluation model (including one for himself), led productive Diversity, Equity, Inclusion and Belonging efforts and enhanced his school’s brand and recognition for excellence. 

Mr. Lyon is married to Veronica Agosta, and together they have two children, Alexandra (16) and Linnea (13). 

Members of the community who met Mr. Lyon during the search process were extremely impressed by his candidacy. Here are a few quotes from the feedback we received:

"He has the personality, the experience, the skills, and the sensitivity to lead our school. 
This is a man who has clarity about what our school can be and how to create a culture that will help us develop our passions and strengths. His vision is in line with who we already are striving to become."

"He is knowledgeable, articulate, and authentic in his manner and speech. He seems to
possess a strong moral and ethical compass which he uses to guide his professional choices."

"Duncan exemplified the qualities that Allen-Stevenson tries to instill in our students. In my
time with him, Duncan exhibited empathy, intellectual curiosity, self-reflection, and a
commitment to diversity, equity and inclusion."

"We believed his preliminary vision for the school had a blend of traditional aspects that make AS so unique, while recognizing there will be needs for continuous innovation so AS boys can meet the challenges of the next century."

"I was blown away by this candidate. He possessed such a perfect combination of warmth, gravitas, candor, intellectualism and energy that I think would be a perfect fit for the school."

Mr. Lyon shared the following when we spoke to him about his appointment:

"I am deeply honored and inspired to join the Allen-Stevenson community as Head of School. The engaging boys with whom I met sold me on the school; they embody the qualities every parent and educator holds dear. Those purposeful conversations were amplified by similar ones with faculty, staff, administration, parents, alumni, and trustees. I look forward to our collective work as we build upon David Trower’s legacy and fulfill the best aspirations for this fine school."

Mr. Lyon is joining Allen-Stevenson at an exciting time in our school’s history. We are nearing the completion of a major enhancement of our learning facilities, implementing newly defined strategic priorities, and continuing to develop our curriculum with an incredibly dedicated and talented group of faculty and staff who are eager to build upon these new initiatives. 

We are confident that Mr. Lyon’s experience, character and values align with the School’s and that he is the right person to guide Allen-Stevenson as it continues to educate boys who are passionate learners and compassionate achievers.

As we express our tremendous excitement about the School’s future under Mr. Lyon’s leadership, we will be celebrating the numerous and significant contributions that David Trower has made to our school, our boys and our community. Early next year, we will begin hosting commemorations to honor Mr. Trower and his incredible legacy here at Allen-Stevenson, in addition to events welcoming Mr. Lyon to our school. 

Thank you for your trust and partnership in this process. 


Metin Negrin
President, Board of Trustees
Chair, Head of School Search Committee

Allen-Stevenson’s distinctive “enlightened traditional” approach educates boys to become scholars and gentlemen.

The Allen-Stevenson School actively seeks to forward the equity and diversity of our community in our admissions, programs and hiring. The Allen-Stevenson School does not discriminate on the basis of race, color, national origin, religion, sex, age, physical or mental disability, citizenship status, marital status, creed, sexual orientation, ethnicity or any other characteristic protected by local, state and federal law. The Allen-Stevenson School actively seeks diversity in its faculty and student body.