Senior Administration

Mark Twarogowski, Headmaster
Mr. Twarogowski has held almost every faculty position in his 25+ years at Denver Academy. He has taught all age levels, coached many sports and mentored dozens of teachers. Prior to his headship, Mark most recently served as Denver Academy's Director of Education, overseeing curriculum policies and all professional development for faculty.

Mr. Twarogowski earned his undergraduate degree in Psychology from the University of Colorado, Denver and holds a Master’s Degree in Education from the University of Denver, where he is currently pursuing a Ph.D. in Education Leadership.

Philippe Ernewein - Director of Education
As Director of Education, Philippe is responsible for training all new Denver Academy teachers, as well as facilitating the continued professional development of all our veteran instructors. Prior to his current role, Philippe spent many years as a classroom teacher, Head of the Core High School and cross country coach. He is a Teach for America Alumni member and continues to stay involved with TFA and collaborate with their Special Education teachers.

Mr. Ernewein earned his B.A. from Longwood College in Modern Languages and his M.A. in Curriculum and Instruction with a focus in teaching English at the secondary level from the University of Colorado, Denver. 

Lori Hull, Head of Lower School
Lori Hull has been at Denver Academy since 1984 and has served as the Lower School Head since 2004. During her tenure, she has taught high school and elementary school, worked as Director of Admissions and coordinated the Elementary Division.

Ms. Hull received her degree in Elementary Education/Special Education from the University of Northern Colorado. She thinks the best part of her job is getting to know our awesome students.

Dan Loan, Director of Communications and Enrollment
Dan Loan has been at Denver Academy since 1978 and is an integral part of our school community. Starting as the school's first intern, Dan has served DA in many capacities including teacher, division head, Dean of Students and Board Member. Currently, Dan manages the DA Admissions and Communications Offices and loves getting the word out about our wonderful school and meeting with new families. 

Mr. Loan earned his degree in Education from the University of Northern Colorado.

Karen Lozow, Director of Development
Ms. Lozow joined the Denver Academy community in 2001 as a parent (Jake Lozow '10) and has been part of the Development Team since 2003. As Director of Development, Karen manages all aspects of the Development Office, including all fundraising campaigns.

Previously, Ms. Lozow ran a teacher training program for the Anti-Defamation League and was a speech pathologist in public and private schools. She is also a past president of the Junior League of Denver and a current trustee of the List Family Foundation.

Karen earned her B.S. in Communication Disorders from the University of Colorado, Boulder and her M.S. in Speech Pathology from Purdue University.  

Anthony Slaughter - Director of Information Technology
Anthony Slaughter has taught in the classroom and by example at DA since 1990. He cares about people and making their day better through the use of technology. Anthony has been at the helm of many large projects at DA including installing a wireless infrustructure and rolling out a 1:1 iPad program. In addition to his duties as the Director of IT, Anthony is co-chair of the Diversity Club. In 2013, he received DA's Staff Member of the Year award.     

Mr. Slaughter attended Carnegie Mellon University and is currently taking additional coursework at Colorado State University - Global Campus.

Berni Vilkus, Director of Finance
Mr. Vilkus has been employed at Denver Academy since 1999, working as the Business Manager and now the Director of Finance. He handles the finances for the school and manages the operations of the business and the accounting offices. He also oversees the Building and Grounds department. Previously, Mr. Vilkus worked in the financial and accounting areas for various distribution businesses (electrical and plumbing/heating).

Mr. Vilkus received his Bachelor's Degree in Business Administration from the College of Charleston.

Mark Wood, Head of High School
Since 1989, Mark Wood has been a fixture at Denver Academy. He served as a teacher in the elementary and high school before his roles as High School Dean and now Head of the High School. Prior to his experience at DA, Mr. Wood worked as a counselor at a residential child care facility and as a drug and alcohol counselor.

Mark earned his B.S. in Human Rehabilitation Services and his M.A. in Rehabilitation Counseling from the University of Northern Colorado.