Dana Karcher is a Project Developer and Area Manager for the Davey Resource Group. She is an ISA Certified Arborist® with experience working with municipalities, non-profits, and utilities for more than 18 years. She is a member of both the Society of Municipal Arborists and the Utility Arborist Association. She currently serves as President of the ISA. Dana’s years of service to the industry include board president and board member of the Western Chapter ISA. Other leadership service includes board member and president of the California Urban Forests Council and member of the California Community Forestry Advisory Committee.

In her career, she has volunteered for numerous committees for the ISA. She has served on and chaired the ISA governance committee and prior to that, the ISA bylaws committee. Additionally, Dana has chaired ISA’s Nominations and Elections Committee and has organized a number of Women in Arboriculture networking events at the ISA Annual International Conference. She served as ISA’s representative to the Sustainable Urban Forestry Coalition (SUFC). She is a founder of the Municipal Forestry Institute and the Green Communities Leadership Institute.

Dana is a native Californian, having lived in the Golden State most of her life. However, a job change took her to Central Texas where she enjoys camping, hiking, handicrafts and the incredible music and barbecue that Texas offers.

Chris Walsh is the founder and managing director of Treetech Specialist Treecare Ltd in New Zealand, a multi-faceted greenspace management company employing over 100 staff members in Christchurch and Wellington. The client base of the company is wide-ranging from residential, council, and commercial sectors. Treetech has always been an industry leader and has embraced technological advances, which have provided the company with a competitive edge in the procurement of contracts. The company is committed to the highest quality of service and the conservation of trees. This approach is focused on adding value by using hands-on, experienced professionals to provide insight in developing projects within agreed budgets that are in tune with client objectives and the environment.

Chris holds a Certificate in Arboriculture (Merrist Wood, UK), National Certificate in Arboriculture, Trade Certificate in Horticulture and Amenity Turf Management, and a National Certificate in Horticulture. He holds an ISA Tree Risk Assessment Qualification gained in New Zealand in April 2014 and is a licenced Quantified Tree Risk Assessment (QTRA) practitioner. He has worked in the arboricultural and horticultural industries for 25 years.

Chris has served on the New Zealand Arboricultural Association Executive Committee, the ISA New Zealand Chapter since 2009, and was the 2014-15 president. In his role with ISA, he has attended two ISA Leadership Workshops at ISA Headquarters in Champaign, Illinois, USA.

Gail Nozal has over 25 years of experience in the municipal, non-profit and commercial sectors of urban forestry and arboriculture. She is an ISA Board Certified Master Arborist, Municipal Specialist and holds the Tree Risk Assessment Qualification (TRAQ).She is an Area Manager with the Davey Resource Group.

She is a member of the Minnesota Chapter of the ISA. Gail earned her master's degree in Urban Forestry at the University of Minnesota. Her years of service have included Chair of the Certification Committee in the Minnesota ISA Chapter, ISA Certification Liaison Committee, ISA Credential Council and is currently serving her second term on the ISA Board. In addition she has also been involved with the Minnesota Shade Tree Advisory Committee which serves as the state urban forestry council in Minnesota. While involved in MnSTAC she served on several committees including serving as a Board Member and Chair of the Outreach Committee. 

Gail is passionate about teaching youth, volunteers and professionals about opportunities in arboriculture.She believes serving on the board is an opportunity to continue to expand and share her passion by encouraging others to get involved in the field of arboriculture.

Sharon Jean-Philippe is an Associate Professor of Urban Forestry in the
Department of Forestry, Wildlife and Fisheries (FWF). She earned her
M.S. in Botany and PhD. in Natural Resources from the University of
Tennessee in 2005 and 2010, respectively.

Sharon has successfully led the development and approval of FWF's
Forestry curriculum concentration in "Urban Forestry" (the
concentration became official beginning in the fall of 2012). Her teaching-related duties for this concentration have gradually shifted from curriculum development to instruction and recruiting, where she teaches courses in the fields of urban forestry, tree law, urban soils and arboriculture.

Sharon applies her substantial teaching skills to promote outreach program to the citizens of Tennessee. Her Extension appointment allows her to work with Extension agents and specialists, as well as directly with all Tennesseans, to help them with their urban forest needs.

Sharon is married to Smith Jean-Philippe and they have two sons, Sidney and Seth Jean-Philippe and they enjoy cruising.

Tom has served as President of the Southern Chapter, founding chair of the Board Certified Master Arborist committee, Tree Risk Assessment Qualification panel of experts, Tree Care Industry Association's member on the Council of Tree and Landscape Appraisers, International Tree Failure Database steering committee, Singapore National Parks Board-Research Advisor, and the American Society of Consulting Arborist's (ASCA) Tree and Plant Appraisal Qualification committee. 

He is the long time chair of the ISA Best Management Practice (BMP) committee and has co-authored many of the BMP' s. He is one of the longest serving advisors to the American National Standards 
Institute A300 committee. 

He has received many awards including Shigo Education, Chadwick Research, Author's Citation, President's Commendation, Southern Chapter Award of Merit, Society of Municipal Arborists Award of Achievement, Society of Commercial Arborists Arborist of the Year, Urban Tree Diagnosis Association of Japan -Honorary Member. 

Tom graduated from the University of Wisconsin-Madison, Colorado State University, and Michigan State University. He is an ASCA Registered Consulting Arborist. 

Caitlyn Pollihan serves as CEO and Executive Director for the International Society of Arboriculture (ISA).  She began her role as Executive Director in 2017, with the Board adding the CEO title in 2020 to better reflect Caitlyn’s leadership responsibilities. During her tenure Caitlyn has successfully led the organization’s relocation to Atlanta, GA US, initiated the modernization of ISA systems and operations, and has increased the global connectivity and accessibility of the association.

Prior to joining ISA, Caitlyn served as the executive director of the Council of Western State Foresters (CWSF) and the Western Forestry Leadership Coalition (WFLC). In this role, she facilitated the development of the organization’s strategic goals and agendas and worked with members and CWSF/WFLC staff to ensure the organization’s success. Prior to this role, Caitlyn was the CWSF/WFLC governmental affairs director where she was instrumental in the creation of key legislation and educating members and partners on legislative proposals and national policy with western implications.

Caitlyn previously served as the staff vice president for government and environment affairs for the Home Builders Association of St. Louis and Eastern Missouri. In this role, she worked on state and local legislative initiatives, green building programs, and helped create and implement a ground‐breaking approach to building site safety inspections with the Occupational Safety and Health Administration. 

Caitlyn participates in several coalitions and committees, such as the Sustainable Urban Forestry Coalition Steering Committee, the i-Tree Executive Committee, and previously served on numerous public policy committees and was an appointed member of the National Advisory Committee for Implementation of the National Forest System Land Management Planning Rule.

Caitlyn holds a bachelor’s degree in contemporary media and journalism/public relations from the University of South Dakota and a master’s degree in organizational communication from the University of Missouri‐St. Louis. She has a Certificate in Nonprofit Organization Management from the US Chamber of Commerce Foundation’s Institute for Organization Management and has earned the Certified Association Executive (CAE) credential, the highest professional credential in the association industry.

Russ Carlson has worked in the field of arboriculture since 1977 as a commercial arborist and an independent consulting arborist. Throughout his career, Russ has taken a multidisciplinary approach to arboriculture with a broad knowledge of trees, the environment, and the associations of trees and people.

Since 1983, Russ has been an ISA Certified Arborist^® with the ISA Pennsylvania-Delaware Chapter, and with ISA when the program became international in 1993. In 2004, he earned the ISA Board Certified Master Arborist® credential. He has been a member and Registered Consulting Arborist of the American Society of Consulting Arborists since 1994. In 2010, he became a Certified Tree Risk Assessor and achieved the ISA Tree Risk Assessment Qualification when the program was initiated.

Russ has presented workshops, seminars, and lectures at various venues and served as an instructor at the American Society of Consulting Arborists (ASCA) Consulting Academy from 1997 through 2010, developing and teaching the Report Writing and the Forensic Investigations training modules.

He has been active in the arboriculture industry, serving on ISA, Penn-Del Chapter, and ASCA committees and boards, including strategic planning committees and the governance committee. Russ also represented ISA on the Council of Tree and Landscape Appraisers for eight years.

Russ has been an active volunteer at the Tri-State Bird Rescue Clinic for 13 years. He enjoys birding, hiking, photography, and travel.

Nicolaas Verloop has worked in arboriculture for the last 35 years. After school, he worked for three years in England, France, and the United States, after which he started his own landscape gardening company. After selling his company, he served as the director for several leading green industry companies. During that time, Nicolaas and three associates founded GreenGuard, a company which develops and produces biological products especially for landscapers, tree care companies, and councils. Currently, Nicolaas is working as a partner of TFI Vital Green, a specialized company that is creating optimal tree-growth opportunities for trees in the urban environment.

Nicolaas has a great interest in business strategies, marketing, and education for our profession. For the last eight years he has served on the KPB-ISA Dutch Chapter Board and has served the Dutch Employers’ Association for the last ten years as a board member of the tree department. Both associations wish to stimulate the arboriculture profession and opportunities for good education.

Nicolaas has served ISA as a chapter executive and as a member of the Student Subcommittee and the Memorandum of Understanding (MoU) Committee. He was a member of the ISA Council of Representatives (CoR) for three years before being named the CoR Chair from 2014 to 2016.

John Gathright is a permanent resident of Japan. He holds a Doctorate of Bio-Agriculture from Nagoya University and lectures at Chubu University. He has conducted extensive research into the physiological, psychological and societal benefits of purpose specific, tree-climbing and tree-assisted therapy programs. He is a pioneer and leader in this field. 

John founded Tree Climbing Japan in 1997. This was Japan’s first technical tree-climbing school. It has grown into a national organization with 4,000 certified tree climbers who have helped over 250,000 individuals of all ages and abilities, to climb trees in urban forests and green spaces.

Dr. Gathright created the Japan Arborist Association, an ISA affiliated organization and the Arborist Training Institute of Japan.

In 2000, John established Tree Hab, a non-profit organization that works with societies, government, doctors and child care facilities in order to enable mentally and physically handicapped children to also experience the joy of climbing a tree.

When not climbing trees, training tree-climbing instructors or enjoying the smiles of the children and families he helps, he can be seen sharing his expertise at events and conferences around the world.

Christopher Boza is currently the City Arborist for the City of Missoula, Montana. He has over 38 years of experience in urban forestry managing municipal forestry programs. Prior to Missoula, Mr. Boza served as the Urban Forester for Hayden, Idaho, the Urban Forester for Chico, California, the Assistant Arborist for San Jose, California, and as a Field Tech for Forest-Ag in Lafayette, California. His first experience in municipal tree care occurred during the Summer of 1980, collecting data for a street tree inventory in Sterling Heights, Michigan, on paper forms!

Chris has facilitated numerous public and industry seminars in Chico, Hayden and Missoula. His most recent project is an urban forestry class for high school students at Big Sky High School in Missoula. 

Chris tested for and received his Arborist Certification in 1986. He also holds a Municipal 
Arborist Specialist certification, an Aerial Lift Specialist certification and a Tree Risk Assessor Qualification. He served on the Western Chapter Certification Committee from 1992 to 2000. 

Chris currently holds an Applicators' License in Montana. He previously held an Applicators' License in Idaho and a Pest Control Advisor License and a Qualified Applicator License in 
California. 

Chris has managed tree and landscape maintenance contracts since 1986 in cities ranging in 
population size from 14,000 to 900,000 residents. The most complex maintenance project 
involved a 5-year landscape contract valued at over $3.6 million and included over 255 acres of parks, median islands, greenways, retention basins and municipal facilities, ranging in size from 1,000 sq. ft. to 15 acres and funded by over 160 separate operating and special operating 
accounts. 

In his spare time, Chris is an avid model railroader in in 1: 1 and 1 :87 scales. He is a member of the Pacific Locomotive Association and the Inland Empire Railroad Historical Society. He 
served as the Chief Arborist for the Niles Canyon Railway from 1988 to 2006. He held a Lone Railway Worker Certificate and a Conductor Certificate from 1990 to 2008. 

Janine Lester is a consulting arborist and President of Landscape
Design Consulting in Richmond Virginia. She is employed full time as a
Certified Arborist in the Department of Public Works in the City of
Richmond. As Richmond’s urban forester, she oversees the planting,
maintenance, and removal of Richmond’s public tree assets.

Janine holds memberships in the International Society of Arboriculture
(ISA), the American Society of Consulting Arborists (ASCA), Society of Municipal Arborists (SMA), and the Arboricultural Research and Education Academy (AREA). She is a Board Certified Master Arborist – Municipal Specialist, and a Qualified Tree Risk Assessor, and is presently the only female BCMA in Virginia.

Janine serves as education chair of the Richmond Tree Stewards, and as a Master Gardener extension agent with the Virginia Cooperative Extension. She enjoys talking to groups about trees, conducting
training workshops, and offers tree and landscape consulting services throughout the state.

Samuel serves as the Director, Consulting Arborist & Climbing
Specialist ofKassod Arbor Tree Consultancy & Services Limited
(Hong Kong) & EmCypress Arborist Consultancy Limited
(Taiwan). Also, he teaches the Higher Diploma Program of Tree
Management & Conservation at Hong Kong Institute of Vocational
Education, VTCHK, aimed to teach the proper practices and
manner to the youngster besides of the regular Arborist works. On
the other side, Samuel speaks fluently in three languages including
English, Cantonese and Mandarin, and fair in Japanese. He was invited by various University, Institute, organization to provide the Arboriculture training, teaching, sharing in different countries such as Hong Kong, Taiwan, China, Japan, Malaysia, Singapore, Australia, United States, etc.

Samuel Ma holds BSc degrees in Applied Biology from Hong Kong Baptist University, and now going back to the Faculty for his tree related research study. He is also an ISA Master Certified Arborist, Certified Tree
Worker - Climber Specialist, Qualified Chainsaw and Pruning (Ground) Technician and Tree Risk Assessment Qualified.

Samuel chaired the Tree Climbing Competition Committee from 2013 to 2015, and also as the member of the chapter's certification committee since 2013 and also. He helps the local Chapter development from 2013 and being the Board of Director since 2015. He has been the Asia Pacific Tree Climbing Championship Operations Committee since 2014. He is also the convener of The Hong Kong Institute of Professional Arborists, and also serves as the committee of Arboriculture & Horticulture Industrial Specification of Competency Standards helping to set up the local qualification framework. He enjoys being a travel Arborist helping the development of tree industry. Besides of the works, Samuel is also
a tree climbing athlete for organizing and participating various Tree Climbing competition and related activities in the world.

Shirley Vaughn is as business developer for Davey Resource Group,
Inc., a contractor which offers natural resource planning and
management services throughout the United States. For Davey,
Shirley’s works focuses on helping local governments with urban
forestry projects and program development. She develops scopes of
work, responds to requests for information, consults, and helps to
develop promotional materials and market services.

Shirley previously worked as regional grant administrator for the Florida Division of Forestry and as park manager and natural resource specialist for Broward County, Florida. She also currently serves as the Executive Director of the Women's Ohio State Golf Association, as a volunteer. Shirley holds BS and MS degrees in Geology from University of Iowa and is certified in Natural Lands Management through the University of Florida Institute of Food and Agricultural Sciences (IFAS) and The Nature
Conservancy. She has been an ISA member and an ISA Certified Arborist® since 2009 and Municipal Specialist® since 2011.

Shirley is a Past President of the Ohio Chapter of the ISA where she helped to streamline the Ohio Chapters™ operations and procedures and promote career opportunities in arboriculture by instituting the "Career Spotlight" in the Buckeye Arborist. She served on several committees for the Ohio Chapter including the Finance, Membership, and Leadership committees, and was the Local Chair for the ISA's International Conference held in Columbus, Ohio in 2018. Shirley was also the committee chair for the Ohio Tree Care Conference. When living in Florida, she was a board member of the Florida Urban Forestry Council and Greenscape of Jacksonville. In addition to urban forestry, Shirley enjoys golfing, hiking, gardening, and RVing.

John Coles is employed as the Senior Tree Officer to the Royal Court of Norway. He is responsible for the management and maintenance of the historic tree population that grows on the Royal estates. The largest of these areas being The Royal Palace Park in central Oslo.

John also works part time as an arboricultural tutor and climbing instructor at Norway's Only State Arborist school.

He has been an ISA Certified Arborist® for 20 years and is TRAQ
qualified. ISA Board of Directors Nominee

John's strong interest in practical arboriculture has led to his involvement in several of ISA's
committees over the past years. He is a former member of ISA's ETCC committee and a present member of ISA's ITCC, ISC and rules committee, and he is also a former ITCC competitor. In his own chapter, John is a member of the Norwegian tree-care forums educational committee and is also an exam sensor.

When not involved with tree projects John likes riding his motorcycle and spending time with
his wife and two daughters.

Carlos has been active for 16 years as an ISA Certified Arborist®, contributing his technical and scientific knowledge to the improvement of national standards for forest management, and the
development of the arboriculture industry. His contributions and management have been of vital importance to encourage and disseminate the concepts and criteria of arboriculture in Colombia
and Latin America, thanks to his diverse contributions, since the creation of the Colombian association of arboriculture ACA, as well as his collaboration in the creation and strengthening of arboricultural associations in Ecuador, Brazil, and Peru.

As well as the creation of the Latin American Institute of Arboriculture, he has been a tireless multiplier of technical concepts, through the training of hundreds of prospects, in the arboriculture industry, both in Colombia, El Salvador, Peru, Ecuador, and Brazil. Carlos has also served as a professor at the district University of Bogotá and the University of the Valley, thus contributing to the training of new forest engineers, and contributing to the generation and definition of national climbing standards, and themanagement of urban trees from the country.

His contributions in the area of research have been very important for the management of vegetation
associated with electric networks and urban trees. Carlos has been the executive director of his
business group, ASFOR Group for15 years, which is considered as the leading business group in the
execution of cutting-edge arboriculture activities in Colombia.

Randy Miller serves as Director of Research and Development at CNUC. He is responsible for conducting utility vegetation management research (UVM), providing subject matter expertise to
utility vegetation management programs across North America, benchmarking UVM programs against CNUC industry surveys, and serving as an expert witness in vegetation management litigation.

Randy has a broad arboricultural and urban forestry background having previously served as Club Arborist at Medinah Country Club in Medinah, Illinois, Wasatch Front Community Forester for Utah State Lands and Forestry, and as an Area Forester and System Forester/ Director of Vegetation Management for PacifiCorp, an electric utility serving parts of California, Idaho, Oregon, Utah, Washington and Wyoming. He holds a BS degree in Horticulture from the University of Wisconsin - Madison and an MS in Urban Forestry from the University of Wisconsin - Stevens Point. He has been an ISA member since 1987 and has been an ISA Certified Arborist® since 1990. He is an ISA Board Certified Master Arborist® and an ISA Certified Utility Specialist™ .

Randy has been Chair of the TREE Fund Board of Trustees, President of the Utility Arborist Association (UAA), Chair of the Edison Electric Institute Vegetation Management Task Force, and President of the Oregon Community Forest Council. He has served on the ISA Certification Test Committee, the ISA Editorial Board and the ISA Appeal's Committee.

He is the ISA 2005 R.W. Harris Authors Citation award recipient, in addition to the 2001 UAA Utility
Arborist Award, 2007 UAA President's Award, 2007 Pacific Northwest Chapter ISA President's Award, 2008 Utah Chapter ISA Distinguished Service Award, 2011 UAA Education Award and 2017 Utah Chapter ISA Lifetime Achievement Award.

He has more than 75 published writing credits, including the ISA Integrated Vegetation Management
Best Management Practices and, as coauthor with Geoff Kempter, Utility Arboriculture: The Utility
Specialist Certification Study Guide. Randy is an accomplished speaker and has delivered hundreds of presentations on arboricultural topics over three decades. Randy is also an eight-time Tour des Trees rider and has raised over $60,000 for TREE Fund.