I confess that I've looked this up, but the answer is, I believe, Arrow Dynamics.
This is the company that designed "The Big One" rollercoaster, and also designed the the steel frame supporting the
Olympic Cauldron for the 2002 Winter Olympic Games in Salt Lake City.
If you'll accept this, I have a question, which goes like this:
Who are the following, who all "celebrate" or otherwise events in their life today:
Welsh singer, born today in 1937
English Author, the pioneer of the detective and suspense novel, born today in 1824
American singer, born today in 1935, the survivor of twin boys
English football manager who resigned from Newcastle United FC today in 1997.