Complex sentence: In San Diego he helped found the leading legal firm of Luce, Forward, Kunzel & Scripps and he went on to become a leading player in business life in the growing city, in particular serving on the boards of several railroads and mining companies.
Split into simpler sentences: In San Diego he helped found the leading legal firm of Luce, Forward, Kunzel & Scripps. He went on to become a leading player in business life in the growing city, in particular serving on the boards of several railroads and mining companies.