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Principal's Message

Welcome to Nederland Middle-Senior High School!

Mark Sibley

Hello Nederland Students, Parents, and Community members,

My name is Mark Sibley and I am very excited to be your Interim Principal at Nederland Middle/Senior High School for this upcoming school year!

I have been a part of Boulder Valley Schools for 29 years where I began my career as a Business and Math teacher at Centaurus High School. I have been at Monarch High School for the past 22 years as an Assistant Principal watching the student body grow from just over 600 to our current student enrollment of 1,556. I also served as the Athletic Director for 14 of my 22 years at Monarch.

My wife and I will be celebrating our 25th Anniversary this August and we have 4 children ages, 22, 21, 20 and 16. Our oldest daughter, Delaney, will be graduating from Edgewood College in Madison, WI with a degree in Nursing this December. Our son, Landon (2018 Monarch Graduate) will be a senior at the University of Northern Colorado as a Math Major studying to be a teacher. Our 2nd daughter, Kendall, will be a Junior at the University of Northern Colorado studying Accounting and Finance. Last, but certainly not least, our youngest daughter, Savannah, will be a Junior at Monarch High School and she has assured me that she will be just fine without me…..OUCH!

I have already met many of the Nederland staff members and I look forward to continuing the great work that the staff has been doing! I really look forward to meeting you all very soon as the 2021-2022 school year will be upon us before we know it. 

Please mark your calendars for the important dates below and look for more information coming in July!

I hope you all have a wonderful summer break!


Mark Sibley