Who We Are

Providing Over 60 Years of Tree Care Excellence

American Tree Experts was founded in 1950 by Chester Ziemienski, who had a passion for providing care to the trees that surround our neighborhoods. After graduating with a degree in forestry, Chester saw a need for a professional tree care provider and City Tree Service was founded. Later renamed to American Tree Experts, the business was sold 30 years later to Chester’s oldest son, Jesse Ziemienski, who is the current President of American Tree Experts. Jesse’s son, Dean Ziemienski, joined the company in 2007 and has since become Vice President.

Chester’s dedication to professional tree care continues to be the focus of American Tree Experts. We enthusiastically support his original purpose today, under the third generation of Ziemienski family management.

  • 2014 Wisconsin Arborist Association Honorary Life Membership Award

    Jesse Ziemienski, President of American Tree Experts, Inc., is the 2014 recipient of the Wisconsin Arborist Association (WAA) Honorary Life Membership Award, the highest honor the association can bestow upon a member. The award was given to Jesse in appreciation for his dedication and lifetime of service as an arborist.

Our Team


Through our professional affiliations and continual training, we have developed a team that is not only knowledgeable but experienced.

Jesse Ziemienski, President & Board Certified Master Arborist

As a board certified master arborist, Jesse has served as president of American Tree Experts since 1989. He received a bachelor’s degree in conservation from the University of Wisconsin-Milwaukee in 1976, as well as two associate degrees from Milwaukee Area Technical College in Environmental Health Technology and General Education. Jesse attained his arborist certification in 1987, making him one of the first arborists in the state of Wisconsin to receive this distinction.

Due to years of experience and dedication, Jesse is one of a handful of people in Wisconsin to achieve the highest-ranking qualification from ISA, Board Certified Master Arborist. He served as President of the Wisconsin Arborist Association during the 2003-2004 term and has served on the WAA Board of Directors for more than a decade. Board Certified Master Arborist: # WI-0145B


Dean Ziemienski, Vice President & Certified Arborist

Dean received his bachelor’s degree in Urban Forestry and Business Administration from the University of Wisconsin-Stevens Point in 2005. Throughout his term at Stevens Point, he was an active member of the Student Society of Arboriculture where he served two years as treasurer.

Dean is member of ISA and WAA and serves on the Editorial Committee of the WAA. He is also the co-chair for the 2014 ISA Annual Conference in Milwaukee. Dean is a Certified Arborist, Certified Tree Care Safety Professional and a Certified Pesticide Applicator. His responsibilities include management of operations and educating clients in tree care matters. Certified Master Arborist # WI-0644A


Ben Richards, Manager & Certified Arborist

Ben graduated in 2007 with an associate’s degree in urban forestry form MidState Technical College in Wisconsin Rapids. He has been with the company since he graduated, serving as a Certified Arborist, Certified Tree Care Safety Professional and a Certified Pesticide Applicator. He is also in charge of managing the plant health care division and meets with customers to discuss their tree care needs.


Our Team

All of our field personnel receive ongoing formal training in customer service and proper tree care. Many of them have received degrees in arboriculture or a related field and are Certified Arborists. The knowledge and experience of our team is what we feel sets us apart from other tree service companies.

Why Work with Us?


American Tree Experts is considered the area’s premier tree care company. Here are just a few reasons why:

  • Accredited through the Tree Care Industry Association
  • Board Certified Master Arborist and Certified Arborists on staff
  • Certified Tree Care Safety Professionals on staff
  • Angie’s List Super Service Award (2011, 2012)
  • Fully insured
  • Certified Pesticide Applicators
  • Member of the Better Business Bureau
  • College degreed in Urban Forestry
  • Past Presidents of Wisconsin Arborist Association
  • Family owned and operated for three generations since 1950
  • Uniformed crews and clean trucks
  • Superior customer service
  • Fully equipped trucks
  • Knowledgeable in the latest industry practices, techniques and tools