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Working Groups
& Liaisons 

Working Groups

Working Groups will be established throughout the year to deliver industry projects and outcomes.

 

If you have an interest in getting involved in an NZ Arb Working Group or are able to support with specific skills, please contact NZ Arb today (administrator@nzarb.org.nz). 

 

Keep an eye on NZ Arb communications also for Working Group vacancies and leadership opportunities as they arise.

Standing Sub-Committees & Working Groups

UA Committee
(Utility Arborist Development)

Chair: Tawa de Goey

Exec Rep: Derek Winwood

Members:

Colin Winch

Carol Cairns

Paul Brown

Trevor Gardiner

Ed Laity

Peleti Tuala-Fata,

Tom Kitson

Ryan Grant,

John Te Amo
Greg Reed

Frank Banwell

Contact
Registered Master Arborists NZ Working Group

Lead: Luke Cabrol

Exec Rep: Richie Hill (Paper Street Tree Company)

Members:

Brad Cadwallader (Cadwallader Tree Consultancy),

Clive Barnes (Auckland Council),

Jack Taylor (Vertical Arborists)

Contact
Registered Consultants Programme Working Group

Lead: Andrew Benson (The Tree Consultancy Company)

Exec Rep: David Spencer (Tend Trees)

Members: 

Howell Davies (Auckland Council)

Contact
Membership Committee

Chair: TBC

Exec Rep: Jak Harris

Contact
Marketing Working Group

Lead: TBC

Exec Rep: Seb Bainbridge

Contact
Membership Committee

Chair: Jak Harris

Exec Rep: Jak Harris

Members: Karl Burgisser, Richie Hill, David Stejskal

Contact
NZ TCC Committee
(New Zealand Tree Climbing Competitions)

Chair: Craig Webb (Craig Webb Consultant Arborist)

Exec Rep: Scott Geddes (Auckland Tree Services)

Head Judge: TBC

Head Tech: TBC

Kids Climb: Branch Dwellers

Auckland: TBC

Waikato/BoP: Craig Lamb (Wintec)

South Island: Raoni Hammer (The Tree People)

Wellington Coordinator: Oliver Peace

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Contact
Conference Working Group
(on hold until 2026)

Lead: TBC

Exec Rep: TBC

Members:

Derek Winwood (Invercargill City Council), Natalie Marsden (Auckland City Council), Chelsea Robertson (ProClimb), Ra Hamer (Tree People), Tawa de Goey (North Power), Lea Boodee (OnCue), Nicki van Asch (OnCue)

Contact
Skills Shortage & Career Pathway Working Group

Lead: Ben Worth (Treescape)

Exec Rep: Chelsea Robertson (ProClimb)
Board Liaison: Chelsea Robertson

Members:

James Isaacs (Tree King), Kevin Birdsall (Treescape) David Spencer (Tend Trees) May Coe (Treetech), Jono Summers

Contact
Sponsorship & Fundraising Committee

Chair: Seb Bainbridge

Lead: Scott Geddes (Auckland Tree Services)

Exec Rep: Scott Geddes

Advisor: Chris Walsh (Treetech)

Members: Rick Jobbit, Richie Hill, Nicki van Asch

Contact
Workshops Committee

Chair: Tim Rillstone

Committee: Scott Geddes

Contact

Lead: Brad Cadwallader

Exec Rep: Derek Winwood (Invercargill City Council)

Members: Lydia Mihaka (Porirua City Council), Steph Dryfhout, Mark Armistead (Tauranga City Council), Richie Hill (Paper Street Tree Company)

Tree of the Year Working Group 

Liaisons & Representatives

NZ Arb has the following Executive-appointed Liaisons, Representatives and similar positions.

 

The various roles below are charged with presenting quarterly reports to the Executive Committee at the Executive meetings.

Standing Liaisons & Representatives

Arbor Day Co-ordinator 
(Arbor Day Planning & Programmes)

Co-ordinator: Mark Roberts (Roberts Consulting)

Contact
ISA Certification Certifiers 
International Society of Arboriculture Certified Examinations

Proctors:

David Glenn,

David James (David James Tree Services),

Mark Roberts (Roberts Consulting)

Contact
MOU Partners Liaison
(Memorandum of Understanding Development & Maintenance)

Liaison: Howell Davies (Auckland Council)

Contact
Website Warden

Liaison: Toby Chapman (Christchurch City Council)

Contact
Advocacy – Stop The Chop Support

Liaison: VACANCY

Contact
ISA 2025 Local Liaison Working Group

Lead: Chris Walsh

Exec Rep: Jak Harris

Members: Rick Jobbit, Toby Chapman, Julian Emeny,
Carl da la Riva, Nicki van Asch, Lea Boodee

Contact
ACOP Liaison 
(Approved Code of Practice Part 2 Review)

Liaison: David Glenn

Contact
ISA COR Chapter Representative
International Society of Arboriculture Council of Representatives

Representative: Jak Harris 

Contact
NZ NTT Liaison 
(New Zealand Notable Trees Trust Communications)

Liaison: VACANCY

Contact
Advocacy – Stop The Chop Support

Liaison: VACANCY

Contact
ArbFest 2025 Working Group

Liaison: Jono Summers, Chelsea Robinson

Contact

Interested in Joining a Working Group or becoming a Liaison?

Click the button below to enquire about volunteering with NZ Arb.

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