Joseph "Joe" Muller is the father of Cathy Ryan and unknown daughter and the father-in-law of Jack Ryan, Sr. and the maternal grandfather of Sally Ryan, Jack Ryan, Jr., Kathleen Ryan, Kyle Ryan, Brian Caurso and Dominic Caurso.

Joe works as a Senior Vice President of Merrill Lynch, where his son-in-law works for four years, before he left.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.