Marketing and social services provider Main Street Hub recently signed a 47,000-square-foot lease at One Congress Plaza at 111 Congress Ave. in downtown Austin. Main Street Hub currently has 400 employees downtown and has plans to expand. One Congress Plaza was built in 1985 and measures 57,962 square feet over 30 stories. Main Street Hub will be taking space on the 12th and 13th floor sometime in the 1st quarter of 2016. Mark Miller and Andy Smith from Parkway Properties provided in-house representation on behalf of the building owner, while representatives with Aquila Commercial represented Main Street Hub.