Call Us for an Appointment: 303.466.3175

Meet the Team


Dennis Shea


Certified Arborist # RM-0188A, Qualified Supervisor Colorado Department of Agriculture, CTSP

Started the business in 1990 with a “truck and a chainsaw”  Enjoys every part of Arboriculture and putting  the many pieces together in the daily operations.  Shares wife Cindy’s passion for dogs and son Riley’s passion for Soccer.

Cindy Shea

Owner/Secretary Treasurer/Accounting

Uber tolerant, understanding and flexible. Cindy manages the books and the homestead. Loves dogs and all things outdoors, and anything involving exercise. Passions are following son Riley on his journeys and planning her next dog adoption.

Trish Manglos

Office Assistant

Trish lives in Westminster with her husband and daughter. She also has 2 married adult sons and 3 beautiful grandchildren that live nearby,  She spends most of her time outside of work with her family and enjoys outdoor activities and traveling.  She worked in corporate America most of her adult life and finally realized it was time to move on.  She started working for Arbortec in August 2016 and finds the family business atmosphere a breath of fresh air.

Joy Ramirez

Office Assistant

Joy has been a steady presence in the office for 14 years. She has been pivotal In helping the business grow and she can handle any job and the customers love her.

She is semi-retired and enjoys traveling and spending time with family and friends.


Michael Buckley

Crew Leader

Certified Arborist #RM-7797A

Michael grew up in Georgetown CO. in the middle of the mountains and loves Forests of all kinds-Urban and Wooded. He has a passion for tree work and can’t see himself doing anything else.  He is married with a 3 year old son and a daughter on the way.

Dylan Dobbins

Crew Leader

Dylan came to tree work after 8 years in the Coast Guard, He loves Climbing and being in the trees.  He is a father to 4 wonderful kids;  Colin, Makena, and twin boys Carter and Mason.

Melesio Rendon


Melesio is a multi-talented team-member. He can do any job in the field from aerial tree work to planting. He keeps our fleet well maintained and running and is a very intuitive and talented mechanic. He is married with 2 wonderful kids and recently bought his first home in Brighton.

His smile and calm demeanor brighten the day.

Mike Bealer


Master diesel mechanic and good friend!  Mike comes on weekends to keep the fleet in shape, nothing Mike can’t do.  Father of 3 and fleet supervisor for a major delivery company. We are blessed to have his help.

Technicians & Groundsmen

Michael Wente

Plant Healthcare Technician

Certified Arborist #RM-8006A

Qualified Supervisor Colorado Department of Agriculture

Michael studied Ecology and Evolutionary Biology at CU Boulder, he worked in Tom Veblens Dendrology lab and studied Lodgepole Pine Regeneration in the face of Mountain Pine Beetle deforestation.

He enjoys mountain biking, soccer, skiing, hiking and traveling.

Riley Shea

Groundsman- Apprentice climber

Riley has worked in the family business the last 2 summers, he enjoys working outdoors with the trees and the hard, challenging work. He is a passionate club and High School soccer player and plans to play in college. He also enjoys spending time with family.

Daulton Logan


Daulton is from Ames, Iowa.  This was his first summer with us and he loves working outside in the fresh air and loves his job.

Daulton is a passionate Club and High School soccer player and has a bright future ahead, we look forward to having him again this summer.

Alex Ivakhnenko

Groundsman/Apprentice Climber

Alex recently moved to the US from Kazakhstan. With his resident Visa in hand, he is building a new in the US with his wife and young son, Alex enjoys working on the computer in his spare time.