Complex sentence: The firm has been led since 1991 through its most dramatic period of growth by Ronald E. Jackson, most recently merging with the 30 year old firm of Stogniew and Associates of Clearwater.
Split into simpler sentences: The firm has been led since 1991 through its most dramatic period of growth by Ronald E. Jackson. Saltmarsh recently grew from the merger with the 30 year old firm of Stogniew and Associates of Clearwater.