About Us

We Love Trees and Caring for Them for Our Customers

ABout the owner

My name is Hannah Gembarowski, owner of Blue Treeper Arbor Care. 

As a young’un, I lived in Vermont where trees were abundant. I loved swinging from my tree fort on a super cool rope swing. In the spring we tapped our maple trees and made syrup. Our job as kids was to pull a sled and fill big buckets of sap to bring to the sugar house – the wood stove in our yard. 

Moving to Colorado as a pre-teen gave me plenty of growing up and exploring time before I had to be an adult. As an adult, I began to dabble in rock climbing, which provided a great foundation for feeling comfortable in trees. I am now lucky enough to enjoy a career where I feel like a kid climbing a tree. 

I named my company Blue Treeper after a character my dad made up for our bedtime stories. The Blue Treeper lived in the woods and though young, knew the woods well. He could be depended on when the local elementary school’s field trip went awry and needed to be rescued. 

As one who spends many hours in the week living in the trees, I relate to my dad’s mythological Blue Treeper (though I haven’t yet had to rescue a school group from a rising creek).

What may have started as a job has turned into my passion. I became a certified arborist with the International Society of Arboriculture. Part of my commitment is ongoing education. 

It is a joy to spend days swinging about in a big beautiful tree and evenings spent in the yard or parks in the presence of amazing trees. 

My team and I care about each tree we work on. We strive to do what’s right for the tree, your yard, and you. We prefer not to remove healthy trees or use harsh chemicals to treat them. We offer non-chemical solutions for unhealthy trees or refer you to companies that work with herbicides and pesticides.

Our Team

Alec Brokaw

I was initially recruited as an EMT and chainsaw operator for a backcountry saw team camping for up to ten days at a time across Colorado’s wilderness felling trees for fuel reduction efforts, trail construction, invasive species removal, and construction of erosion control systems. From my experience in the woods, I earned certifications as a firefighter and feller 2 for wildland firefighting.I left the woods when I learned you could climb trees, and since then I’ve focused most of my time as a residential arborist. As an arborist, I like to focus on the science and art of tree care. Being well informed with modern science as well as understanding how we can safely live with trees helps me approach any tree the right way.


Riley Premer

Angie Spano

Our Promise to You

  • We will be competitive with our prices and do our best work. We can match a competitor’s price within reason. A written bid and contact info for the other company will be required. We are who we say we are. You can find us on the list of licensed arborists in your city. Note: Some cities do not require licensing. We won’t try to sell you something you don’t need.
  • We will leave your property looking great and your trees better than they were. Please note that if there is snow on the ground, you will find buried treasures when it melts. Everything will be small enough that it can go in your compost pile or the trash bin.
  • Each individual on site is insured in case of damage to property. Call us to talk about specifics of our policy or concerns about damages to property

We Care About Trees

We cut down trees but we don’t want to if we don’t have to. We love trimming and pruning trees to keep them healthy and flourishing. 

What Our Customers are Saying

“First everyone was so very nice. My tree looks amazing, everything was cleaned up with no damage to my plants. I am over the moon and will definitely be calling in the spring for the recommended pruning. I can now sleep better and not worry about that branch falling on the powerline.”

Preparation for Our Work

There may be some prep work for you before we get to your house:  

  • We ask that any area we may need to access is clear. This includes but is not limited to, the area around and under the trees we will be working on, access paths between the trees and the front of the house, driveways and in front of the house, neighbors’ yards if we are working on trees that share airspace. 
  • When we arrive we can help move larger objects such as tables, grills and trampolines. A job may need to be postponed if there is a car in the driveway or the street where we absolutely must work. 
  • It’s not necessary for you to be home on the day of the work. We won’t need access to your house. Gates needed for access will need to be unlocked. This may include neighbors’ as well. 
  • Our equipment is loud. This is not the day to have a lunch meeting on the patio.
  • We love dogs! We don’t want any harm to come to them if they run around under the trees, so please keep pets inside or confined away from the work zone. 
  • Also, please make sure dog messes are cleaned up prior to our arrival. 


Blue Treeper Arbor Care is licensed in each city in which it contracts. A license exam requires a multi-facet test. Many smaller municipalities don’t require licensing. The company carries liability insurance covering property and person.

We’ve been in business since 2017. What started as a one woman operation has developed into an established small business and growing team.    

We concentrate on the northern and western suburbs of Denver but are happy to travel to others parts of the city to help people with their trees. 

We offer fall clean up for leaves in your yard and gutters. 

We work closely with another local company who does all our chemical treatments and plant health care.  Find out more about Ryan here:


We work with Chris at Colorado Happy Trees for most planting jobs:



Many tree service companies lay off their workers for the winter or do snow plowing, but we don’t. We work hard to get the word out that we can still work on trees during the dormant season. Here in Denver we have many great days of weather during the winter and our crew is able to do tree removal and pruning. It is also less stressful on the tree to trim during its dormancy.

Yes, we schedule this for another day after we call in a utility locate.