Our Team
Administrative Team

Diane Dunne
Head of School
Beth Steklac
Assistant Head of School and Director of Admissions
Arleen Brogan-Smith
Business Manager
Sharon Muench
Curriculum Coordinator and Middle School Mathematics Teacher
Kristi Holmes Espineira
Director of Marketing
Tami Vinson
Director of DevelopmentPhilanthropy and mission have been in Tami’s vocabulary since she was a young volunteer. Today, Tami still gives her time actively to various nonprofit organizations including serving on the Steering Committee as the Chair of Mentoring for the Institute for Leaders in Development program at the University of Denver. A program for which Tami is also a graduate. Tami has also served as President of the Association of Fundraising Professionals (AFP) Colorado Chapter and National Philanthropy Day Chair.
Tami is thrilled to join the Mackintosh community where she can merge her professional experience and personal life. Tami comes from a family of educators and is inspired and fueled by Mackintosh Academy’s mission of keen minds, compassionate hearts and global action. Tami, her husband and their daughter, Zoe, are excited to have found this wonderful community.

Denise Sironen
School Psychologist & SEL Coach
Sarah Schultz
Office ManagerFaculty

Ocean Sehlmeyer
PreKindergarten Lead Teacher/DirectorOcean lives in downtown Littleton with her husband Jesse and their two daughters, ages 18 and 15. As a family they care for several pets and travel, both locally and abroad, whenever possible.

Uta Letbetter
PreKindergarten Associate TeacherUta lives with her husband, their two energetic teenage boys and Rooney, their family Cockapoo. She has lived in Germany and Shanghai and has many volunteer hours in both the public elementary school and British International elementary school where her sons attended. Uta is passionate about creating and supporting a joyful and creative environment which instills a joy and passion for learning among our youngest students. She loves to spend time with her family and friends, and likes to hike, canoe, snowboard, read, travel and write.

Kellyrae Meadows
Kindergarten TeacherIn her free time you might spot her at the local rock climbing gym, perusing a book store, in the mountains with her two rescue pups (Koda and Puccini) or teaching a yoga class. Mindfulness is very important to Kellyrae and she hopes to share her mindfulness practice and strategies with our community.

Greg Ashworth Fanch
PreKindergarten & Kindergarten Associate Teacher, Photographer and School Safety
Delaney Monroe
1st Grade Lead Teacher
Lara Pausback
2nd Grade Lead Teacher
Lula Guilbert
3rd/4th Grade Lead Teacher
Mia Dixon
3rd/4th Grade Lead TeacherOutside the classroom she enjoys rock climbing, travel, sewing, hiking, scuba diving, cooking, and, most recently gardening, and raising chickens in her backyard.

Darrah O'Flaherty
3rd/4th Grade Associate TeacherIn her free time, Darrah is an avid traveler and lover of the outdoors who enjoys rugby, hiking with her rescue greyhound, camping, reading, and snowboarding. Darrah feels lucky to enjoy the creativity, inquisitiveness, empathy, and sheer joy that children bring to their studies and daily lives.

Nancy Muhich
5th/6th Grade Lead Teacher
Roger Chow
5th/6th Grade Lead Teacher
Joe Pausback
7th/8th Grade Math and Science Teacher
Tari St.Marie
7th/8th Grade Language & Literature/Humanities Teacher
Josh Onderdonk
Physical Education TeacherWhen not teaching at Mack, Josh is doing something pertaining to sports or outdoor activities. He loves hiking in the mountains with his wife Sam, and takes any chance he can get to hit the links. Josh and Sam are also the proud parents of a 140 pound St. Barnard/Great Dane mix.

Christy Allen
Visual Arts Teacher
Kelly Kates
Performing Arts TeacherKelly was a counselor and teacher for ten years at Options Alternative High School, where she led the school drama, dance and choral programs. Kelly has worked as an actress and choreographer in Denver for the past twenty years, receiving recognition from the Denver Post and the Colorado Theatre Guild. She loves sharing her passion for the performing arts with children and youth. Fifteen years ago, she founded the children’s program at Town Hall Arts Center in Littleton. Before coming to Mackintosh, she taught musical theatre and tap dance for Centennial Academy of Fine Arts Education and the drama enrichment program for Wilder Elementary. Kelly and her husband live in Littleton with their two dancing daughters. She enjoys international travel with her family, and has volunteered for Habitat for Humanity in El Salvador and Canada.

Maria Cardona
World Languages Teacher - Spanish

Clara Butler
Spanish Teacher & Childcare Provider
Alison Weems
Sustainability Coordinator

Val Steklac
Tech Specialist & Afterschool ChildcareWhen not diving into news around the latest computer technology, Val enjoys searching for new and exciting tabletop games to learn and share.

Stacey Anderson
Learning Specialist
Anne Wolf
Learning SpecialistDon't Be Shy. Get In Touch.
If you are interested in working together, send us an inquiry and we will get back to you as soon as we can!