Complex sentence: His acting eventually segued from the stage to screen and in 2005, he became heavily involved in producing and promoting independent film and television; he even sat on the executive board for ACTRA (the Canadian equivalent of SAG) for two years.
Split into simpler sentences: His acting eventually segued from the stage to screen and in 2005, he became heavily involved in producing and promoting independent film and television. This led to his sitting on the executive board for ACTRA (the Canadian equivalent of SAG) for two years.