Complex sentence: Shortly after he founded Stereorey, he became the president and director general of another innovative broadcaster based in Monterrey, Televisión Independiente de México; after leaving TIM, he returned to television in 1976 by founding Telerey, the first production and postproduction center in Mexico.
Split into simpler sentences: Shortly after he founded Stereorey, he became the president and director general of another innovative broadcaster based in Monterrey, Televisión Independiente de México (TIM). After leaving TIM, he returned to television in 1976 by founding Telerey, the first production and postproduction center in Mexico.