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Distributed Ledger Workgroup

Business intelligence, timeliness and efficiency are important to MLS participants. Whereas the RESO Web API provides a signaling mechanism, and the RESO Data Dictionary provides elemental definition, lifecycle events allow information to be consumed in a more natural form.

The purpose of the RESO Distributed Ledger Workgroup is to identify and document property lifecycle events. These events could be recorded in a distributed ledger by the industry participants to support accountability, provide instant notifications and identify rules/patterns that are valuable to real estate professionals. The catalog will utilize RESO Data Dictionary fields and the RESO Web API wherever possible.

The workgroup will work closely with other RESO workgroups to maintain alignment with their work.


The Distributed Ledger Workgroup meets the 4th Tuesday of every month at 12:00 pm ET / 9:00 am PT. | JOIN A RESO WORKGROUP!


Distributed Ledger Workgroup Chair – Mark Lesswing, CTO, T3 Sixty & Founder, Lesswing LLC

Mark Lesswing leads T3 Sixty’s overall technology efforts, is a blockchain entrepreneur and the founder of Lesswing LLC, which focuses on market development, asset management and supply chain. He has worked with companies in the real estate industry to prepare them for blockchains, and his work includes hands-on efforts, presentations and executive briefings. Prior experience includes his role as the Senior Vice President and Chief Technology Officer of the National Association of REALTORS®. Mark has more than three decades of experience working in real estate technology.

Education: Lehigh University, Bachelor of Science, Industrial Engineering

Contact Information: | 630.788.8658