DALLAS--(BUSINESS WIRE)--TIER REIT, Inc. (NYSE: TIER), with global real estate investment manager Invesco Real Estate and Austin-based Cielo Property Group, announced today it has completed the sale of Third + Shoal, a newly-developed, 100% leased, Class AA office tower in Austin's CBD. "We believe the sale represents a new precedent of demand for top quality office properties in Austin," stated Scott Fordham, Chief Executive Officer of TIER REIT. "We are proud of the mark we have left on the A