Our People

Get to Know Us

At Mountain High Tree, customers come first. We strive to provide high-quality, courteous service to everyone we serve.

You can also get to know us better through our monthly email newsletter, the Tree Top Times, which features a regular section recognizing one of our employees. Now you can put a face to the voice you hear or see!

View some of our team’s bios below:

Denver Tree Company - Owner Ralph BronkRalph Bronk
 Owner / Consulting Arborist

Ralph Bronk is the owner of Mountain High Tree, Lawn and Landscape Co. In 1974, Ralph started this business with one truck, a chain saw and a vision. Today, Mountain High employs over 80 people, and has grown into a full service tree, lawn and landscape company. Ralph leads our team with the Mountain High’s core values – honesty, integrity and treating people right!

daveDave Entwistle
 Sales Manager / Certified Arborist

Dave trains and mentors new employees and meets with our customers.  Dave has been with us for over 20 years, and has been in the industry for over 30 years.  He is a dedicated employee and he loves what he does.  When he isn’t working, he enjoys golfing and spending time with his lovely wife, four daughters, son-in-law and he is a proud grandfather.  Dave is a valued member of the Mountain High Tree family.

Denver-Arborist-Craig-LittleCraig Little
  Certified Arborist/ Manager Plant Health Care Department

Craig has been working for Mountain High Tree since 2004. He has a horticulture degree from Penn State University (double major in forestry and entomology), is a certified arborist, licensed pesticide applicator and Department of Agriculture qualified supervisor. Craig’s strong education in horticulture along with his experience at Bartlett Tree and his amazing work ethic has allowed MHT to be recognized as one of the best plant health care departments in the Rocky Mountain region. The Colorado State Forest service asked Craig to participate with the testing and ultimate approval of a trunk injection for the control of Mountain Pine beetle. Craig’s work ethic is rivaled by none and envied by all.

Denver Tree Company Employee

Lee Kral
 Lawn Department Manager

We are pleased to introduce Lee Kral, our new Lawn Department Manager. Lee brings over 13 years lawn care experience to this department. Our Lawn Department’s goal is to provide you with the best locally owned lawn care services available in the Denver area. With Lee’s expertise in this area, we are confident that we will meet our goal.

Colorado Springs Arborist

Al Wegner, Colorado Springs Branch
Manager – Certified Arborist

Al, manager of the Colorado Springs Branch, has been with Mountain High for 33 years. He is a degreed forester, an ISA Certified Arborist and Certified Tree Worker/Climber Specialist. Al can boast to being an overall champion in 2 ISA Rocky Mountain Chapter Tree Climbing Championships. Besides his love of trees, he has endless energy to run, hike and ski in the outdoors.

Colorado Springs ArboristBecky Wegner
 Certified Arborist – Colorado Springs Branch

Becky, our Consulting Arborist and Salesperson, has worked in the field of arboriculture for over 30 years, much of that as a forester for the City of Colorado Springs. She is a degreed forester, an ISA Certified Arborist, a certified municipal specialist and an ASCA Registered Consulting Arborist. She has also received the Tree Risk Assessment Qualification (TRAQ) from ISA. Besides her love of trees, Becky’s passion is running and seeking out the notable and ancient trees.

Denver ArboristJames Retzlaff
 ISA Certified Arborist/Safety & Trim Department Manager

James has been with Mountain High Tree, Lawn, and Landscape since March of 2008. He moved to Denver from Upper Michigan to work for MHT as the perfect fit to work for because of the family attitude and MHT’s mission to recycle as much as possible. James has over a decade working in the tree care industry. While working for MHT James has studied and passed his Commercial Driver’s License, became an ISA Certified Arborist (RM-7351A), Tree Care Industry Association (TCIA) Certified Tree Safety Professional (CTSP-1168).

James is in charge of the trim department’s safety programs and assists the department manager in purchasing equipment and training the staff to be as safe as possible. James also provides MHT with in house First Aid and CPR training as he’s a certified instructor and former Wilderness EMT. When not at MHT, James enjoys spending time with his wife Danielle, where they camp, climb 14ers, and fish.

Eric Hanneken editedEric Hanneken
Planting Manager

Eric was born in Cincinnati, Ohio where he began work in the landscape field. His 9 years of experience include working for a garden center, a tree company, commercial lawn maintenance, and residential/commercial landscaping. He graduated from the Ohio State University with a Bachelor of Science in Landscape Architecture in August of 2016, and left Ohio in pursuit of a lifelong dream to move to Colorado. He had never been here before, but has found it is everything, and more, than what he had imagined. While in Colorado he has spent his winter’s sharpening his skills in the powder in hopes to one day take a trip to Alaska, and drop in from a helicopter. He says, “I had never dreamed Colorado could get any better, and then the mountains turned green.” He spends every weekend exploring the wilderness far and near. His favorite hobbies include fabrication, photography, and music. He has an interest in all genres, and says he especially enjoyed the CO Symphony’s performance of David Bowie. He says he has found the perfect career for him at Mountain High. He really enjoys having the chance to meet different people, study the native plants, and to paint a living aesthetic with the available palette. What really draws Eric to this career path is the opportunity to still get his hands dirty sweating out the summer sun in beautiful Colorado.


RobRob Wano
 Certified Arborist

Rob Wano recently returned to the Denver area and came back to work with us again as in Sales. Rob has three sons, Isaac., Adam and Tyler. Rob adds so much value to our company – his wit, intelligence and charming personality contribute to providing excellent service for our customers. We are all very happy to have him back on the team!

Denver ArboristBobby Savage
 Certified Arborist

I am a Colorado native where I spent most of my youth skiing and camping with my dad. I attended an outward bound program through my teenage years which is when I fell in love with the outdoors. I have been snowboarding since I was 12 and started rock climbing 6 years ago, which is why I love to climb trees! I love heights!

I have been at Mountain High Tree for 11 years starting in the Plant Health Care department and learning about pest control and diseases. I now work in the tree trimming department as a foreman and have been here in this position for 6 years. I decided to become a certified arborist two years ago to expand my knowledge. I have recently taken a part time position in our sales department to continue my growth within the company. I love this industry and have been in it for so long because there is never a dull moment, I get to work outside, and always something to new to learn.


Kevin Finn
 Certified Arborist

Kevin is originally from Illinois, moving to Colorado in 1993 for college. He attended Western State College where he obtained a Bachelor of Arts degree in outdoor recreation. Kevin has been working in the tree industry since 1999, becoming a certified arborist in 2004. Kevin owned Tree Trimmers Inc. in Gunnison Colorado and was in business from 2003 through 2008. Kevin made the move to Denver and Mountain High Tree in 2009 where he works in the Plant health care and trim departments. When Kevin isn’t working at MHT, he is also a professional drummer, playing with Casey James Prestwood and the Burning Angels country band.

The rest of our Team:

Mountain High Tree has many more people on our team than listed here, we’re working on adding more bios regularily.

Diesel-Shop-DogMark Bilyeu & Diesel
 Maintenance Manager

Mark Bilyeu is our Maintenance Manager. Mark and his team keep our equipment and vehicles in proper working order so that crews can safely tend to our customers. Mark shared his “story” to us of how he came to join the MHT family in the summer of 1993. As a young man, Mark (like many young people), wasn’t quite sure about what he wanted to be “when he grew up”. So he worked at a variety of jobs trying to find his passion, but none of them held his interest. One day his mom handed him an ad from MHT and the rest is history. He began in our Plant Health Care department as a Spray Technician and, given his versatility, he also did some tree pruning. Then we discovered his mechanical aptitude! You see, when Mark would bring equipment or a vehicle in for repair, he didn’t just describe the problem, he would diagnose it! Mark agreed to transfer to our maintenance department, and as the maintenance assistant, he learned how to maintain and fix everything the “old farm” way. He worked his way up to Maintenance Manager, and has formed a great team with the skills and knowledge to keep everything in working order.

Mark and his wife Carri enjoy the outdoors, especially if it involves snow and/or motorized vehicles. They also foster dogs for Mutt Savers (founded by Carri’s mom). Mutt Savers bring dogs in from Kansas (which has an abundance of feral dogs), and holds weekly adoption events at Pet Smart in Westminster. Foster parents usually take in these dogs from Tuesday through Saturday, helping them to be healthy and look their best while they await adoption. We at MHT also think highly of Mark and admire both Mark and Carri for their Mutt Saver efforts. Our dear friend and shop dog Diesel  has gone on to bigger lawns in the sky. We miss you, buddy!

Kristina MacLean
 Business Operations Manager /
 Accounts Payable and HR Manager

Denver Tree Company Employee How do we keep our office organized and running efficiently? Who takes care of the company HR needs to ensure a happy and productive team? That would be our Business Operations Manager, Kristina MacLean. Working behind the scenes at Mountain High Tree for over five years, Kristina enjoys keeping the day to day operation running smoothly. Leaving her home state of Michigan, Kristina and her 10 year old daughter, Morgan have made Colorado home. In her spare time (really?) she volunteers for the PTO at Morgan’s school and enjoys giving back to the community and spending play time with her daughter. Kristina certainly adds great value to the Mountain High Tree family and we are thankful to have her aboard. In photo: Kristina and Morgan the MHT Company picnic in July.

Denver Tree ServiceDixie Maes
 Customer Service / Accounts Receivable Manager
Being a Colorado native, the Mountain High philosophy is something I fully embrace.  I was raised on a working cattle ranch between Pueblo and Colorado Springs (yep, I’m a cowgirl), so taking care of the land and our pant resources was part of my life growing up, and I truly believe Mother Nature is our biggest ally.  I attended school at Fountain, graduating from Fountain-Ft. Carson High in 1974.

Family includes my spouse of 30 years, Gil, daughter Nicole, son Quinton, grandchildren Lilliana, Lanea, Anthony & Jaelonnie, 5 step-children and 13 step-grandchildren/great grandchildren/ great grandchildren in Louisiana, 2 brothers, 1 sister and more nieces/nephews, great nieces/nephews and great-great nieces/nephews than can be counted anymore!!

In my time off, I’m an avid reader and also enjoy spending time with the grand kids.  Love spending vacations just road-tripping with my husband to wherever we decide to go – our latest favorite is Reno!!

I started working at Mountain High on March 10, 2005 and currently hold the position of Customer Service & Accounts Receivable manager.  I’ve enjoyed my 11 years at Mountain High and hope there are many more to come (well, at least until I retire!!)  The people I work with and the customers we serve are the best around!

Ralph and Robin are the greatest, and to give them big Kudos, I’m fully behind their generous support of the Children’s Diabetes Foundation, particularly in light of the fact that my granddaughter Lanea, has Type I Diabetes.

This is me in a “nutshell”!

Denver Lawn CompanyBecky Black
Assistant to the Sales Department

Becky does administrative, research and other work for the sales crew. Working for up to 7 sales guys keeps her very busy.

Becky has been with Mountain High since 2003. She is a busy mom of 2 and cherishes her time spent with her entire family.

Dan-HarveyDan Harvey
Lawn Manager – Colorado Springs Branch

Dan Harvey, our Plant Health Care Supervisor, has been with Mountain High in Colorado Springs for a little more than a year. Dan has been in the industry for 10 years and is a Colorado Department of Agriculture Qualified Supervisor in tree and lawn care. He has been in Colorado Springs over 25 years. His off hours are spent with his wife, Brenna and preschooler, Emma. Many of their activities revolve around their dogs, Timber and Ash.

When he has time, Dan dabbles in woodworking. Dan is working on bringing lawn care services to our Colorado Springs customers. How exciting for us! Stay tuned for more!

Denver Tree Company Employee Elisha Harwood
Trim Department Scheduler

We are proud to introduce Elisha Harwood! She is the Administrative Assistant in our Irrigation department. Elisha was hired in March just in time to dive right in to the spring irrigation turn on season… busy, busy time. Elisha has 10 years of experience in our industry starting her “green” career at John Deere Landscaping in 2004. When the economy went bad; she decided to go back to school and get her degree. With a scholarship from The Colorado Garden Foundation (which runs the Spring & Fall Home shows), she earned her degree from Front Range Community College in Horticulture and Landscape Technology with a focus on Landscape Management. Elisha is a native of Colorado and loves working at Mountain High! We love having her here too, what a great asset. In her spare time she loves to get her hands dirty working in the yard and watching movies with her two kiddos, Genisee and William.

Denver Tree Company Employee Kara Jahn
Customer Service | 2016 Employee of the Year

We are pleased to welcome Kara Jahn to our team of Customer Service professionals. Kara has 24 years of industry experience, with an emphasis in plant and lawn health care. Kara has lived most her life in Colorado. She has 2 daughters and 5 grandchildren (from 10 years to 14 months) and she spending her “spare” time with her family. Kara loves Halloween and loves going to haunted corn mazes, they are the best.  Kara says “I enjoy the challenges that each year brings and I’m happy to be part of the Mountain High team.” We are very fortunate to have Kara with the Mountain High Family!

Alex-lawnAlex Karker
 Lawn Technician

Last October, Alex moved to Denver from Miami, Florida where he was a firefighter – so he could be with his girlfriend, Francesca. He was referred to Mountain High by one of our long term employees (Jerry) who told him what an awesome company MHT was to work for. Now he is busy working with us as a Lawn Technician and agrees that this is a great company. When not out in nature with his dog, Colt, Alex likes to work out, lift weights and hang with his girlfriend. What a nice guy to add to our crew!’

FrankFrank Podrasky
Shop Mechanic / Mulch Master

It is our pleasure to introduce you to Frank Podrasky. Frank has been with MHT since October of 1999, serving as a member of our maintenance team. As you can see from his photo, Frank really gets into his work! When he isn’t on the job, Frank likes to spend time with his family: his wife Danielle and his children Christina and Kyle. Frank enjoys a variety of activities like going to the park to hunt frogs with Kyle. His current favorite “me” time activity is rebuilding a 1975 Camaro; Kyle sometimes joins his Dad. We are certainly looking forward to seeing the two of them “cruising” the streets of Lakewood in the finished product. Stay tuned for those photos!

danielleDanielle Solano
Accounting Assistant / HR

Danielle started with Mountain High Tree, Lawn & Landscape as a temporary accounting assistant. We were so impressed with her progress and work ethic that we offered her a position on our team in July of 2012. She supports the Accounts Payable, of course Accounts Receivable and Human Resource Departments. When Danielle is not working with numbers and handling the company’s money, she enjoys spending time with her 16 year old daughter Alina. (They look like sisters, Danielle is on the right.)  She loves watching movies; her all-time favorite is Gone with the Wind.  Danielle also loves to make people smile and laugh. If you are having a bad day, Danielle can cheer you up with her lovely smile. Truly, that smile is contagious and are extremely pleased to work with her everyday!

lisa-wadkins1Lisa Wadkins
Customer Service – Colorado Springs Branch

We are pleased to introduce Lisa Wadkins, the Business Support Administrator for our Colorado Springs Branch. We are excited about the strong and versatile talent that Lisa brings to our team!

Born in California, Lisa has lived in the Denver area for most of her life. She and her family moved to Colorado Springs this past March (lucky for us!). She has been married to husband, Jim, for 21 years. They have 3 children: 2 boys (Aaron 27 and Dillon 20) and a daughter (Kassandra 19).

In her spare time she enjoys camping, playing bingo and spending time with my family. “In general, I lead a rather boring life” says Lisa. She has a great sense of humor too! Lisa also shared “I am thrilled to be working at Mountain High. Everyone here is great and has made me feel right at home”. We feel pretty lucky to have you too Lisa! Welcome aboard!


Deb Wheeler
Assistant to Sales / Marketing

We are pleased to introduce Deb Wheeler. Deb joined MHT in January of 2012 as a Customer Service Representative. Over time, we discovered that she was also a great addition to our Sales Support team and a great help in our marketing efforts. Deb was raised in Wyoming, but spent many years traveling around the Pacific. She smiles as she shares her many amazing adventures while living in different parts of the world. What great experiences! (We keep telling her she should write a book!)

When asked what she would like for us to know about her, she offered the following: “The majority of my work experience has been in the recreation field. I served as a Program Director for youth and adult sports and special events for 13 years before moving to Denver. I definitely miss working with the “kids” – they keep you young at heart. I have two fantastic daughters that live in the Denver area and I am extremely proud of them. I enjoy playing and watching sports of any kind. I love to try new and different things; it keeps my life interesting. I moved to Denver 2 years ago, and love it! Mountain High has given me the opportunity to use my marketing skills and learn about the tree, lawn and landscape business. But most importantly, I work with some very talented and wonderful people.” Thanks Deb… we are very happy you’re here!

Customer Service

Mary has been with Mountain High since June of 2006. She is our lead Customer Service Representative and a huge asset for the company. She has three daughters that she enjoys spending her spare time with. Mary and her husband love hiking and traveling, and she has recently visited the Washington/Oregon coastline, made a road trip to Arizona, and most recently went on an Alaskan cruise. One of her favorite activities is cooking, especially for the office pot lucks!! Thank you, Mary, for all your contributions to Mountain High!!

img_20150831_121037300_hdrPatricia Schroeder
 Customer Service
I hail from the Las Cruces, New Mexico area. I have been known to say that I am related to half the town! Our family is a blended family of 5 ‘kids’ that range in ages from 35 to the youngest being 27. We have a 10 year old granddaughter and a 3 year old grandson. I share my home with my wonderful husband Terry and my 2 cats, Smokey and Lucky. My most favorite place to be is in my backyard on a summer evening.Thank you everyone at Mountain High for making me feel welcome!

We are lucky to have Patricia, she is quick to learn and just an all around great person to work with.  Welcome to our team Patricia!



View more of our Staff Bios in our blog »