In 1969 Rains joined a client, Neuhaus+Taylor, an architectural firm, named managing partner the following year and in 1971 merged that firm and two engineering firms and took the combined companies public.  Two years later he completed a leveraged buyout taking the firm private, reportedly the first in SEC history.  Through acquisitions and internal growth over 20 years, 3D/I grew to $2 Billion annual construction volume.  Rains rose through the ranks to become Chief Operating Officer, then President and finally Chairman of the Board.  In 1988 Rains resigned to accept the Governor’s appointment as Secretary of State of Texas.

In addition to his military and public service, Rains has ‘given back’, serving on numerous Boards and Commissions, including Baylor College of Medicine, Texas Medical Center, and M. D. Anderson Cancer Hospital.  The City of Houston and Harris county, jointly named Rains Founding Chair of the Harris County Houston Sports Authority.  The Authority was responsible for the current generation of facilities for Houston’s MLB Astros, NFL Texans and NBA Rockets franchises.  The combined cost of all infrastructure exceeds One Billion Dollars.  Rains has received numerous awards and honors for his contributions to public service.

Today Jack Rains is of Counsel’ to the Law firm Gray Reed and McGraw and consultant to several companies. He makes his home in Houston, near his three children, grandchildren and their families.