Staff and Headquarters Info


Mike Wollmer – Executive Director and CEO


Mike is the chief executive of the Ice Age Trail Alliance and is responsible for managing, planning, directing, administering, and evaluating all components of the Alliance’s programs, staff productivity, and volunteer support. He ensures that program activities, operational budget, and financial planning are consistent with the mission of the IATA and meet the long-term goals identified by the Board of Directors in the Strategic Plan. As the principal spokesperson for the Alliance, he is responsible for maintaining productive dialogue with the National Park Service and Wisconsin Department of Natural Resources and other governmental partners.

Tim Malzhan – Director of Trail Operations


Tim manages the IATA Trail program by assessing and prioritizing statewide trail and trail infrastructure opportunities and needs. He also develops and manages projects and policies related to designing, building, maintaining, and stewarding the Trail. Tim is the principal architect of the Mobile Skills Crew program and the Trail Notebook Series. Other key duties include working closely with partners and volunteers to ensure that environmental compliance, funding, planning, and Trail management objectives are met. He was introduced to the Ice Age Trail when he completed a thru-hike in 1991.

Kevin Thusius – Director of Land Conservation


Kevin manages the IATA Lands program by completing land transactions for the Alliance and assisting partners with land protection efforts for the Trail. He also manages the Alliance’s roughly 3,000 acres of land interests, including more than 50 easements and dozens of Alliance-owned preserves. Other key duties include leading the Alliance’s advocacy efforts related to land protection and land management and assisting with large-scale planning efforts led by our partners.

Eric Sherman – Member and Volunteer Services Coordinator


Eric joined the staff in 2006 and manages the IATA’s database, donor/membership communications, volunteer hours tracking program, awards program, and the updating and publication of the Alliance’s suite of guidebooks. He also serves as the office IT coordinator and is a key contributor to Mobile Skills Crew program communications. Eric is a half-time employee, switching from full-time in 2011 upon the birth of his daughter, Pearl.

Brad Crary – Special Projects Coordinator


Brad works closely with the 21 volunteer chapters, assisting with their needs and communicating the strategies and expectations of the Alliance, National Park Service, and Wisconsin Department of Natural Resources. He attends chapter meetings and events, provides technical assistance in identifying trail maintenance projects, assists with NPS-led corridor planning strategies, and helps make landowner contacts. Brad also works with the Land and Trail program directors on special projects.

Tiffany Stram – GIS Specialist


Tiffany maintains the IATA’s Geographic Information System. In addition to keeping trail and lands data up to date, she coordinates GPS mapping efforts and creates and provides maps and mileage statistics. Tiffany offers GIS/mapping and GPS assistance to IATA staff and ensures that other agencies and organizations have up-to-date information about the Ice Age Trail. She’s also part of the team that updates IATA’s guidebooks. Tiffany lives in West Bend with her husband and two children.

Joanne Ellarson – Administrative Assistant


Jo answers phones, assists walk-in guests, ships merchandise, keeps inventories, performs data entry, pays bills, and performs many other duties essential to the smooth running of the Alliance office and programs. She also enjoys spending some time maintaining the landscape both around the IATA building and on the Trail. Visitors to the IATA office might catch Jo up on a ladder with needle and thread — the job of sewing leaves and acorns on the beautiful Giving Tree falls to her as well.

Luke Kloberdanz – Director of Outreach and Education


Luke Leads the Alliance’s Education and Outreach programs. This includes managing Saunters, the IATA’s school hiking program, coordinating outreach events, and designing training opportunities for volunteers and chapters. He also makes connections with communities and partners to create new opportunities to get people out on the Ice Age Trail. Luke lives in Lodi with his wife Letha, two sons Gus and Wynn.

Dave Caliebe – Trail Program Specialist


Dave started as Trail Program Specialist in 2013, helping to increase the capacity of the Alliance to craft more trail. He coordinates and supervises volunteers at Mobile Skills Crew events and provides leadership and training to local chapters. Dave also chronicles the MSC events through his writing and photography (if you see him with a camera, he’s not slacking off – he’s working). He has been an active participant in IATA volunteer programs for several years and thru-hiked the Trail in 2010. In his spare time, Dave likes traveling with the wind and discovering the hidden beauty of Wisconsin and beyond.

Bob Lange, ChFC, CAP – Philanthropic Advisor


Bob is a Chartered Advisor in Philanthropy as certified by the American College with 20+ years of development experience. In addition to being responsible for foundation and corporate support, Bob meets with individuals state-wide to assist them in determining the best financial and estate planning strategies to accomplish their philanthropic goals and leave a legacy for future generations.

IATA Headquarters

Our office is located right on the Ice Age Trail in downtown Cross Plains, 30 minutes west of Madison. We’re open Monday through Friday, 8 a.m. to 5 p.m.

Our mailing address is:

Ice Age Trail Alliance
2110 Main Street
Cross Plains, WI 53528

Phone: (800) 227-0046 or (608) 798-4453
Fax: (608) 798-4460