Board Certified Master Arborist
Certification # WI-0131B
Wachtel President and Board Certified Master Arborist Dave Scharfenberger credits then-girlfriend (and now wife of 30+ years) Judy with directing him toward an Urban Forestry major at the University of Wisconsin - Stevens Point. He wisely switched his degree from Forestry when she pointed out that she "didn't want to live in a forest."
Dave is still grateful for her encouragement to redirect, and loves working with and caring for trees, the oldest and largest living organisms on earth.
Dave's love for trees started when he was just four years old and planted a silver maple from a seed in the vegetable garden at his parent’s home. A few years later Dave transplanted it to the front yard and delighted in watching it grow over the years, providing beauty and shade for the home.
Today Dave serves on the Finance Committee of the International Society of Arboriculture, after being on the board of directors for 9 years. He is also a Wisconsin Arborist Association Honorary Life Member and is an active member of the Tree Care Industry Association and the Wisconsin Landscape Contractors Association. He is a past president of the Wisconsin Arborist Association and is a recipient of a number of Distinguished Service Awards.
Dave's favorite tree is the Tamarack Tree, the only deciduous conifer.
Certification # IL-0099A
President & ISA Certified Arborist, Jeff Wilson is a graduate of Northland College with a BS in Biology. He has almost 40 years experience in the science of tree care.
An advisor to the Forestry programs at UW Stevens Point, MATC, and Mid-State Technical College since 2001, Jeff enjoys watching young people enter the profession and grow into very talented tree care specialists. He takes pride in Wachtel's highly educated, friendly staff, and is a strong proponent of employing good honest people who are the very best at what they do. According to Jeff, one of Wachtel's greatest strengths is "great people helping great clients."
Jeff is active in the International Society of Arboriculture, Wisconsin Arborist Association Board Member, Tree Care Industry Association and Wisconsin Landscape Contractors Association. Jeff’s favorite tree is the strong and mighty Kentucky Coffee tree.
Jeff and his wife planted Kentucky Coffee trees in their back yard to commemorate the births of their two children.
Board Certified Master Arborist
Certification # WI-0153B
ISA Board Certified Master Arborist, Paul Markworth has a BS degree in Forest Management from Purdue University and has over 41 years of experience working with trees and their problems. He is a past president of the Wisconsin Arborist Association and has received both their Distinguished Service and Honorary Life Member Awards. Also the TCIA Volunteer of the Year award. Past member of the ANSI Z133 Safety Committee and current member of the ISA Science & Research Committee.
Board Certified Master Arborist
Certification # MN-0324B
Certified Arborist Ron Gumz developed an instant respect and admiration for trees when, at age 8, a willow branch snapped under his weight and he fell 10 feet onto his back on the soft earth. The accident taught him that even the healthiest looking trees can surprise you, and that knowledge and safety are key components when dealing with trees.
Ron has been working in arboriculture since the late 1990s. He graduated from the University of Wisconsin - Stevens Point with a bachelor's degree in Urban Forestry, and has since become a Certified Arborist. He is a member of the International Society of Arboriculture and is on the Wisconsin Arborist Association Board. Ron loves spending his days outside (even in the cold Wisconsin winters) and uses his vast knowledge to keep trees looking and doing their best.
One of his favorite parts of the job is interacting with clients on their property. He knows his clients appreciate that Wachtel Tree Science can be trusted to do what’s best for their trees, and with regular care and maintenance can help keep their properties looking beautiful all year round.
Ron's favorite tree is the mighty oak - its many different varieties have the potential to live for hundreds of years.
Board Certified Master Arborist
Certification # WI-0102B
Chief Diagnostician & ISA Board Certified Master Arborist Tony Arnoldi has more than three decades of field experience in the diagnosis, treatment and maintenance of trees and shrubs.
As a child, Tony loved hunting, camping and fishing with his dad, and wondered how he could turn his love of the outdoors into a profession. When he and his friends constructed a rugged tree house in an old hawthorn, his appreciation of nature grew into an appreciation of trees. A degree in Forest Science from the University of Wisconsin fueled his love for caring for trees on an individual basis, and he became Certified Arborist. Tony is a member of the International Society of Arboriculture, the Tree Care Industry Association and the Wisconsin Arborist Association where he served on the Board of Directors for several years. Tony's projects have won two Excellence in Arboriculture Grand Awards, and Award of Distinction.
One of Tony's favorite parts of the job is seeing trees that were once sick and are now healthy, especially when his clients notice the changes.
Tony's favorite tree is the American Beech because of its great strength and aristocratic flair.
Former Waukesha County Extension Agent
Diagnostician Certified Arborist
When Diagnostician & ISA Certified Arborist Jean Ferdinandsen was a child, she and her brothers would climb the catalpa tree outside their kitchen window and have duels with the tree’s long, distinct pods. Her love for trees and the outdoors led to BS and MS degrees in Horticulture from the University of Wisconsin, Madison and more than 36 years of experience in the care of trees and shrubs.
Jean’s favorite parts of her job are interacting with her clients on their properties, diagnosing problems and working with her peers to provide all of Wachtel’s clients with the highest quality care.
A licensed and certified pesticide applicator, Jean is a Life-Member of the International Society of Arboriculture, as well as a member and past president of the Wisconsin Arborist Association, and recipient of their Distinguished Service Award.
Jean, her husband Leif and son Stefan share a love of the outdoors. In their spare time they enjoy camping, hiking, bicycling, etc.
Jean loves the unique Catalpa tree because it reminds her of her childhood and the first home she owned.
Municipal Specialist Certified Arborist
Certification # WI-0249AM
When John Gall was a sophomore at Appleton High School, his biology teacher chose him to participate in the program “Trees for Tomorrow.” This program, which offered multi-day exposure to the various aspects of forestry, set the course for John’s future. 42 years ago, he received his BA in Forest Management and became the first master’s candidate to receive a MS degree in Urban Forestry from Purdue University.
Today John uses his experience and education as a Special Projects Coordinator & ISA Certified Arborist/Municipal Specialist to give back to our local communities. He finds it especially rewarding to work with smaller communities that don’t typically have a forester on staff. John knows his clients appreciate the very knowledgeable staff at Wachtel Tree Science, and is proud of the staff’s strong character and work ethic.
A past president of the Wisconsin Arborist Association, John has received both their Distinguished Service and Honorary Life Member Awards. He recently stepped down from the Wisconsin Urban Forestry Council after serving as the Wisconsin Arborist Association Representative for 8.5 years.
John's favorite tree is the Chinkapin Oak - he has one in his backyard that he nurtured from an acorn he acquired from the Morton Arboretum in Lisle, IL.
Diagnostician Certified Arborist
Certification # WI-0678A
Keith Glaznap found his love for the outdoors at a very young age as his parents would take him and his sister on weekly camping trips to central Wisconsin. Keith would often take long bike rides down old logging roads through the forests of central Wisconsin content "to just be in the woods." These trips helped him to develop an awareness and an appreciation for our natural world.
As the years went by Keith went on to UW-Stevens Point to obtain a bachelor's degree in urban forestry. Shortly after college he became a Certified Arborist. After being in production for a number of years, Keith has since grown into the current sales arborist position he now holds.
As Keith took his passion for nature and molded it into a career caring for trees, he now considers himself blessed to be a part of such a knowledgeable group of individuals at a company where client needs come first. He is alsays quick to point out that our clients are the ones who benefit the most from this unique arrangement of knowledge and skills.
Keith's favorite tree is the fragrant White Pine. He fondly refers to this majestic tree as "the Sequoia of the Midwest."
Certification # IL-1392A
Diagnostician & ISA Certified Arborist Jake Kubisiak has been caring for trees since 1997.
When Jake Kubisiak, son of a DNR biologist, was pursuing his degree at University of Wisconsin-Stevens Point he was captivated by an infrared study that showed the affect trees have on the urban environment. The infrared photos showed red where there were no trees, and blue where the earth was cooled significantly by the presence of trees.
When he considered tree care as a career, he was impressed by how passionate and friendly tree care professionals were; their love and enthusiasm for their profession encouraged him to pursue a BS in Urban Forestry at UW-Stevens Point.
Jake worked in the field climbing and treating trees for five years before becoming a Sales Arborist. He enjoys working with clients who share his love for trees, and is touched by how many people care for and treat their trees like a member of their family.
Jake’s favorite tree is the ironwood; an intriguing and often undervalued plant with an interesting shape and biology.
Senior Plantsman Diagnostician Certified Arborist
Certification # WI-0188A
Certified Arborist Bill Reichenbach brings 36 years of arboriculture experience to Wachtel. The son of an avid outdoorsman, young Bill spent much of his childhood outdoors in the forests and fields of Wisconsin, fishing, hiking and hunting, observing and enjoying nature. He still does today.
One of Bill's favorite parts of the job is getting to know his clients and working with them to contribute to the beauty and value of their properties. He takes pride in Wachtel's high professional standards, and being an integral member of its educated, talented and friendly staff.
Bill is a member of International Society of Arboriculture and the Wisconsin Arborist Association. He has served on the board of directors of the Wisconsin Arborists Association, and has appeared on PBS's 'The Victory Garden' and 'The Wisconsin Gardener' over the years. He has won numerous industry awards, including an International Society of Arboriculture Gold Leaf Award and a Wisconsin Urban Forestry Council Award working with the City of Waukesha in preserving the Dunbar oak.
Bill's favorite tree is the Bur Oak, a beautiful, sturdy, robust tree of the American Midwest.
Client Service Representative
Amanda Workman has been in the client relations industry for over 10 years and has developed a great passion for keeping her customers and coworkers happy. In addition to her extensive experience in customer relations she is very interested in film, media, and marketing. This combination makes her the perfect addition to our Wachtel Tree Science staff as CSR and marketing assistant.
She is currently working on her English major and a double minor in Film Studies and History at the University of Wisconsin-Milwaukee. While her degree focuses on literature, culture and media, her love for the outdoors and the culture of Wachtel makes her feel right at home here.
Amanda has spent every summer since childhood camping with friends and family, and has grown a great appreciation for nature. She knew growing up that her ideal job would be the culmination of all her interests and passions: writing, helping customers, working with friends, and being outdoors.
Amanda’s favorite tree is the Sugar Maple because of the dramatic and beautiful color of the leaves in autumn.
Wachtel Tree Science Staff
|Name|| Service Start|
| Year Started|
|Tony Arnoldi||Jun-1985||1980||4 YR||WI-0102B||BCMA||
|Kyle Babicky||Feb-2011||2010||4 YR||WI-0889A||CTSP||
|Dan Barwinski||Oct-2006||2006||4 YR||
|Jon Budish||Aug-2016||Arborist Trainee|
|Ron (RJ) Busch||Feb-2012||2012||
|Patrick Conrad||May-2016||2008||Arborist Trainee|
|Janet Doss||May-1990||1990||4 YR||
|Plant Health Care Manager|
|Joanne Edmundson||April-2013||2013||2 YR||Office Manager|
|Chelsea Feil||May-2016||4 YR||Seasonal Arborist Trainee|
|Keith Glaznap||Apr-2007||1998||4 YR||
|Ron Gumz||Feb-2006||1999||4 YR||
|Cody Hagfors||May-2015||Seasonal Arborist Trainee|
|Reid Hundertmark||May-2016||4 YR||Arborist Trainee|
|Brent Kahn||Nov-2001||1987||2 YR||WI-0302A||Tree & Landscape Manager|
|Allison Kassel||July-2015||4 YR||Arborist Trainee|
|Mike Klein||Aug-1989||1989||WI-0306A||Certified Arborist|
|Jake Kubisiak||Dec-2012||1995||4 YR||IL-1392A||
|Paul Markworth||Mar-1994||1969||4 YR||WI-0153B
|Mary Pederson||Jan-2016||4 YR||Arborist Trainee|
|Bill Reichenbach||Jul-2008||1979||4 YR||WI-0188A||
|Ben Reince||Jan-2003||2003||4 YR||WI-0610A||CTSP||
|Ryan Rodefer||May-2010||2008||4 YR||WI-0883A||CTSP||Certified Arborist|
|Ty Roznowski||Aug-2016||Facilities Maintenance Asst.|
|Dave Scharfenberger||Mar-1994||1975||4 YR||WI-0131B||ASCA
|Paul Scharfenberger||Jul-1997||2002||4 YR||WI-0841A||Certified Arborist|
|Nathan Schuettpelz||May-2010||2009||4 YR||WI-0887AM||M||
|Jessica Schultz||Jan-2017||4 YR||Arborist Trainee|
|Jeff Schulz||Apr-1990||1988||4 YR||WI-0288A||Certified Arborist|
|Alec Schuppel||Oct-2013||2013||4 YR||Arborist Trainee|
|Gary Stanwood||May-1994||1979||Masters||WI-0572A||Certified Arborist/Seasonal|
|Tom Steele||May-2014||4 YR||WI-1106A||CTSP||Certified Arborist|
|Luke Volbrecht||Nov-2013||2012||2 YR||WI-1112A||Certified Arborist|
|Megan Whelan||May-2015||4 YR||Accounting Specialist|
|Jeff Wilson||Mar-2007||1975||4 YR||IL-0099A||Owner/President/
|Amanda Workman||March-2014||Client Service Representative|
|Holly Zart||June-2013||1999||4 YR||WI-1023A||Certified Arborist|