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Our Team

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K. Clay Haynes is an entrepreneur and life-long learner with deep roots in Middle Tennessee.  

He is the founder of One Public Square, a sustainable real estate investment + development company that focuses on the adaptive reuse of historic structures.  One Public Square is a purpose driven company that develops with intent. We have an acre for acre commitment – for each acre or property we develop, we offset it with an acre in permanent natural space easement.  Clay is also an unlimited licensed general contractor and launched Castalian Construction in 2012 to direct all aspects of the construction process.

Guided by the core belief that to those who are given much, much is expected, Clay seeks to contribute his time to organizations that equitably strengthen community.  He serves as the board chair for the Nashville Arts and Culture Commission and is a member of the SouthArts board of trustees. He created and currently serves on the advisory board for Startup Gallatin, an organization cultivating the next generation of entrepreneurs in his hometown.  Clay is passionate about conservation and is an active member of the next 30 committee with the Southern Environmental Law Center.

He holds a degree in political science from Washington University in St. Louis and a certificate of French Language from the University of Paris Sorbonne. Above all else, Clay seeks to be a good father and a good husband.


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Terry Hughes is a creative thinker and multidimensional doer with a wide range of skills and an ever curious mind. 

He believes in the value of good ideas and that the simplest answer is usually the right one, regardless where it originates. As a creative problem solver, Terry strives to find the best solutions, even if that means challenging the status quo. He values personal relationships and approaches each new interaction as an opportunity to learn.  

Terry believes that persistence is paramount, regardless of background or innate ability. He has worked in a wide array of roles related to real estate, including: capital markets, development, brokerage and construction. He holds both a law degree and an MBA in Finance from Indiana University, both of which he earned while working full time. He earned a technical undergraduate degree as part of the first graduating class from the Concrete Industry Management program at Middle Tennessee State University, where he also played Division I basketball.  

Terry is happily married with four young children, including two boys and two girls.  He enjoys spending time with them, playing sports, being outside, building things and seeking opportunities for personal and collective improvement.