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about the international slackline association [ISA]

ISA Website // Facebook // Contact


The ISA is a grassroots effort created by a collection of slackliners from around the world who are passionate about the community, sharing resources, and promoting slacklining in all forms.

In February 2014, during the Turkey Highline Carnival, representatives from 8 countries and 14 organizations gathered to discuss the need for an international slackline association. Born from that meeting, the International Slackline Association (ISA) was developed to consolidate the efforts of multiple non-profit groups and support the continued development of national and local organizations.

The International Slackline Association was officially founded in August 2015 by the SwissAustrian, German and U.S. national associations through the efforts of the ISA Development Team and other volunteers. More national groups are in the process of forming and will be added as full active members as they become eligible.  Regional and local associations can also apply to be associate members.

Mission Statement:

The International Slackline Association aims to support and develop the slackline community, protect access, enhance communication and informational resources, and increase the safety of all forms of slacklining worldwide.


The ISA is composed of a Board of Directors and a General Assembly consisting of delegates from our National Association Members. 


executive board

Sonya Iverson


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Slacklining since 2008.

After founding SlackLink.org, a website dedicated to providing online resources for slackliners, Sonya has been increasingly involved in community development. Sonya is also on the board of directors of Slackline U.S. and primarily handles communicationsvolunteer coordination and general organization for the ISA.

Thomas Buckingham


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Slacklining since 2007.

Thomas is the president of Swiss Slackline and helped build the local organization Slack Attack in Berne, Switzerland. He's been heavily involved in the development of recommendations published originally by Swiss Slackline, many of which can be found on this website. Thomas primarily coordinates development of safety materials and recommendations and organization logistics.


Thomas Spöttl



Slacklining since 2009.

Thomas is on the board of the Austrian national slackline association, Slackline Verband. As Treasurer of the ISA he's the guy handling the paperwork and keeping track of our member organizations.


Marc Thompson


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Slacklining since 2011.

Marc is the president of the local slackline association Slack Attack in Berne and has helped in translation efforts for Swiss Slackline. He joined the executive board during the 2016 General Assembly. His primary responsibility is coordinating the volunteer efforts to translate ISA publications.

Advisory Board
Chairman: Philipp Gesing, Germany (email)
Vice Chair: Bradley Duling, Denmark / USA (email)
General Secretary: Helmuth Ronacher, Austria (email)
Representative: Laetitia Gonnon, Switzerland / France (email)
Representative: Lisa Bretagne, Switzerland (email)