Complex sentence: From 1950 until his death in 1995 Rifkind was partner at Paul, Weiss, Rifkind, Wharton & Garrison LLP, and eventually came to be seen as the guiding spirit of the firm.
Split into simpler sentences: From 1950 until his death in 1995 Rifkind was partner at Paul, Weiss, Rifkind, Wharton & Garrison LLP. Over the course of his tenure he came to be seen as the guiding spirit of the firm.