Our Team


John G. Jessen, AIA, NCARB

Senior Vice President
Design & Construction

John Jessen is an award-winning licensed architect and proton therapy domain expert. Over the past 35 years, John has developed a unique expertise in managing proton therapy center project design and construction both domestically and internationally. John possesses a thorough understanding of the intricacies and unique challenges that both academic and non-academic clients face when implementing a proton therapy center project.  He is an expert at assembling and leading proton Design & Construction teams and will provide Legion and its partners with optimum results.

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By definition, the word Legion means an immeasurable crowd, vast host, multitude or number of people. Our Legion takes the fight against cancer to heart.

  • 2001 Kirby Drive
    Suite 1100
    Houston, Texas

  • info@legionhp.com

  • 650-600-0001


Images courtesy of Varian Medical Systems.
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