• Donald Gallo – President


    Donald P. Gallo, an attorney with Axley Brynelson, LLP , concentrates his practice on environmental, real estate and business matters. Mr. Gallo is also a professional engineer with more than 40 years of experience specializing in environmental engineering and 25 years of experience in law. In addition, he teaches a graduate-level course in environmental law at the Milwaukee School of Engineering.

    Mr. Gallo is currently affiliated with:

    • Milwaukee Bar Association (Environmental Law Section)
    • State Bar of Wisconsin (Environmental Law Section)
    • Advisory Committee member in the development of several Wisconsin Department of Natural Resources and Department of Commerce regulations
    • Keep Greater Milwaukee Beautiful/Greening Milwaukee (Board President)

    Don holds a J.D., cum laude, from Marquette University Law School; M.S.C.E., from The University of Akron (Environmental Engineering); and B.S.C.E., with honors, from Tri-State University College of Engineering.

  • Nancy Bonniwell – Vice President


    Nancy Bonniwell is a Shareholder focusing her practice at von Briesen & Roper on estate, business succession and marital property planning, estate administration and business law. She is a frequent presenter on the subjects of estate planning, business succession planning and charitable giving. Nancy is recognized in The Best Lawyers in America® (Trusts and Estates 2012-2018) and was the recipient of the Outstanding Advisor of the Year Award from the Greater Milwaukee Foundation in 2014. Additionally, she was recognized as one of the Wisconsin Law Journal’s “Women in the Law” and is a Fellow of the Wisconsin Law Foundation.

    Nancy is very involved in the Waukesha County community. She is the Chair of the Town of Delafield Board of Appeals and is a member of the Waukesha County Board of Adjustment. She serves on the board of directors of ProHealth Care Foundation and is a director and member of the executive board of Tall Pines Conservancy, a land trust located in Waukesha County. She is also an active member of the Planned Giving Council of Children’s Hospital and Health System, the Advisory Board of Waukesha County Community Foundation, and Lake Country Charity Connection.

    Nancy is a member of the Waukesha County Bar Association, the Milwaukee Bar Association, the Association for Women Lawyers, Professional Dimensions, TEMPO Waukesha, and the Waukesha County Estate Planning Council where she also served as President.


  • John Syburg – Treasurer

    John Syburg TPC

    John, a Chartered Financial Analyst (CFA), has a 30-year history of working with public, private and institutional investors to help achieve their financial goals.

    A graduate of the University of Wisconsin-Madison with a degree in Finance, John began his investment career at The Marine Trust Company (now JPMorgan Chase), where he worked as an equity analyst and portfolio manager for owners of high-net-worth, personal trust accounts.

    Since then, he has held a variety of positions involving both individual and institutional investment management. That experience includes time in management and capital markets with Blunt Ellis and Loewi, and as a shareholder in Cleary Gull, a Milwaukee-based investment banking and brokerage firm focused on the institutional marketplace.

    John founded Blackthorne Partners in fall 2007 to focus his efforts on private equity investments. Blackthorne continues to build that portfolio of small private businesses.

    John has a history of professional and personal engagement among his peers and in the community. He is a member of the Association for Corporate Growth, the CFA Society of Milwaukee;Tall Pines Conservancy; and the “Wisconsin” Regional Board of  Milwaukee Young Life.  He also sits on the Board of Directors of Integrated Medical Partners, Pallet USA, Berlon Industries, Hughes Equipment Company, Schaefer Brush, ManageCore, Inc. and Design Specialties; all Blackthorne portfolio companies.


  • Troy Giles – Secretary


    Troy E. Giles is a shareholder in Reinhart’s Environmental and Real Estate practices where he works with manufacturers, developers, lenders and municipalities in matters involving environmental laws and regulations and general real estate concerns. He has significant experience working with and appearing before state and federal agencies including the US EPA and the WDNR in matters involving environmental reporting and compliance.

    With nearly twenty years of legal experience, Troy understands the ever-evolving connection between environmental law and everyday business operations; therefore, he is able to provide his clients with strategic and practical approaches to environmental matters intended to maximize business opportunities while minimizing risk potential. Troy is adept in handling the entire life-cycle from acquisition and development to letting and disposal of real estate maters.

    Prior to joining Reinhart, Troy served as General Counsel and Director of Business Operations for an engineering and environmental consulting firm where he oversaw the firm’s legal matters, managed outside counsel and drove growth strategies—including the firm’s brand development for more than 10 years.
  • John Koepke


    John Koepke has been working with Tall Pines Conservancy since 2005, when he became involved in local zoning issues. He is part-owner of fifth generation Koepke Farms, established in 1875, with his Dad, Jim, and Uncles Allan and David.  His passion for “keeping some country in Lake Country” led him to serve as both Supervisor on Oconomowoc’s Town Board and formerly as a board member for the Wisconsin Department of Agriculture, Trade and Consumer Protection’s Working Lands Initiative. He is also a past president of the Waukesha County Milk Producers Cooperative.  Koepke won the Gathering Waters (Wisconsin’s Alliance of Land Trusts) Policymaker of the Year Award in 2012 and in 2011 Koepke Farms won the Leopold Conservation Award for their best management practices.

    In the Spring of 2013, the Koepke family worked with Tall Pines Conservancy to place 109 acres of their Uncle Harry and Aunt Mabel’s land known as Pleasant View Farms under conservancy easement, meaning it is permanently protected against being developed. The Pleasant View Farm property is located in the Town of Oconomowoc. It has a view of both Holy Hill and Lac La Belle and abuts the northern edge Nature Hill. Its preservation ensures a sweeping view of open land from Nature Hill for generations to come.

  • Ray Peebles

    Ray Peebles

    Growing up in Mapleton in the Town of Oconomowoc, Ray Peebles is part of the 5th generation to be involved in the family’s working farm.  He serves as a member of the Conservation Committee.

    Ray is Global Product Marketing Manager for Cooley Group, a company provides solutions for some of the world’s most notable water, chemical and fuel containment and commercial roofing initiatives. He obtained his BA in Business from the University of Wisconsin-Whitewater, has an extensive real estate background and serves as Vice President of FGI, Fabricated Geomembrane Institute, an industry-sponsored institute advancing the use of fabricated geomembranes.

  • Jeanna Schwinn



    Jeanna is a Senior Civil Engineer Technician at Daar Engineering Corp. She currently works on WE Energy projects to develop base maps that cover vast areas of Wisconsin. The drawings include all topographic features, right-of-way, and underground utilities. She also assists with design for proposed gas and electric plans.

    Her background includes: serving as Survey Crew Chief for the Northwestern Mutual Tower and Commons building in downtown Milwaukee,  management of the Transportation Project Plats produced by Daar with design office and land development office, extensive problem-solving, organizational and analytical skills with the ability to evolve project strategy based on research, data, and industry trends is key to my work.

    In August of 2015 Jeanna completed a Project Management Certificate through UW-Milwaukee Continuing Education School.

    Jeanna is a high-energy leader with an entrepreneurial mindset. She is very driven not only in her work but also her personal life. Outside of work, she is a member of the Velo Femmes(cycling club), races in the Glacial Trail and 50K North Face trail runs, and is very active with Wheel and Sprocket events. Jeanna began her involvement with Tall Pines Conservancy as a member of the Communications & Outreach committee, which handles event planning, membership development and outreach activities.

  • Mark Wierman

    Mark Wierman

    Mark Wierman joined Ixonia Bank in September of 2014 as its Chief Lending Officer and is currently President. With 30 years experience, Mark’s main responsibilities at the Bank are managing the Bank’s commercial lending team and loan portfolio as well as leading the Bank’s new business development efforts. Prior to joining the Bank, Wierman was a senior leader of Associated Bank’s commercial banking team, heading its asset-based lending group. He is a graduate of University of Wisconsin-Whitewater, where he obtained a Bachelors degree in Business Administration – Finance.

    Wierman is active in several local organizations, including serving on the Finance Committee of the YMCA at Pabst Farms and as Finance Chair of Gethsemane United Methodist Church in Pewaukee. Mark is also a member of the Board of Directors of the Ausblick Ski Hill, and is active in the Association for Corporate Growth. Mark resides in the Oconomowoc area with his wife Debbie.  They have three adult children and two grandchildren.  Mark enjoys outdoor activities such as golfing, fishing, and hunting in his spare time.


  • Kyle Zwieg


    Kyle Zwieg, a sixth generation dairy farmer, is a 2006 graduate of Oconomowoc High School.  He is also a 2008 graduate of the UW Madison Farm and Industry Short Course Program –  Specialization in Soil Science and Agronomy.

    Kyle is a former employee of Koepke Farms and is part owner of Zwieg’s Maple Acres LLC Dairy Farm.  Maple Acres is one of 15 farms in Wisconsin whose purchase of development rights was funded by the PACE program (Purchase of Agricultural Conservation Easement).  Tall Pines Conservancy co-holds the easement with the State of Wisconsin.  The Homestead Farm was established in 1856.

Advisory Board

William Biersach

Samuel Bradt

Katie Brumder

Hank Ehrsam

R. Jeffrey Harris

Laura Gralton

Caran Quadracci

Ted Rolfs

Bruce Rosenheimer

Truman Schultz

Anne Sheedy Seidel

Jeffrey Spence

Steve Traudt