Great job by the Lockheed Martin team and your Dad!
6 years already.. wow..
lots of images over at the space.com photo gallery
http://www.space.com/php/multimedia/imagegallery/igviewer.php?gid=384
The Rings and Moons of Saturn
A Tectonic Feast
The Cassini spacecraft has been studying Saturn and its moons since it entered orbit in 2004. These 15 snapshots were some of its most popular as Cassini began an extended mission that now stretches to 2017. .. NASA/JPL/Space Science Institute
He worked a lot of overtime on integrating the packages and so forth, but he really enjoyed it.