MGH Photo 1

Mass General Hospital Proton Center Upgrade

Project Location: Boston, Massachusetts

Mass General Hospital was one of the first hospitals in the world to establish its own proton center for cancer therapy. Working with the Harvard Cyclotron Laboratory (HCL), Mass General physicians became the first in the world to discover how to harness the extraordinary physical characteristics of high energy protons for medical care. In 2001, the Francis H. Burr Proton Therapy Center was opened.

24 years later, the Burr center is undergoing a major renovation and complete proton equipment upgrade. This project marks the first major upgrade of a proton center anywhere in the world. Unlike designing a new-built proton center, an upgrade presents significant technical challenges installing a new proton system in the footprint of first-generation technology.

For a project with this level of complexity, MGH retained proton experts from Legion Healthcare Partners, collaborating with John Jessen as Project Manager. John assembled the AE and construction team while leading the strategic planning efforts defining the detailed approach for this major undertaking.

John led the effort with the equipment manufacturer in rewriting IBA’s Interface Building Document for the upgrade, which began with a year-long “Gap Analysis” identifying the differences between IBA’s IBD requirements and what the existing building can provide. The project is currently under construction.

Work in progress by John Jessen in collaboration with Legion Healthcare Partners.

Services Provided

Project Management

We oversee your project from initial planning through first patient treatment, coordinating specialized teams and managing the complex 3-5 year timeline these facilities demand.

Owner Representation

We advocate for your interests throughout the development process, ensuring that equipment selections, site decisions, and budget allocations align with your long-term operational goals.

Subject Matter Expert Advisory

As the world's leading proton therapy architects, we guide your decisions with experience that saves time, money, and prevents costly mistakes.

Decommissioning & Dismantling

We extract and replace massive proton equipment during facility upgrades, managing the logistics of removing hundred-ton systems through precisely planned access routes.

Feasibility Studies

We analyze your site conditions, financial parameters, and operational requirements to determine whether your proton therapy center vision is buildable and sustainable.

John Jessen

About John Jessen

John Jessen, AIA has over 40 years of experience helping people execute proton therapy projects worldwide. In 1994, he started and ran VOA (now Stantec) Proton Therapy Practice in Washington DC, and over the decades he built the largest proton design team in the world.

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