Complex sentence: A few months later Vrdoljak was appointed to the post of general manager of Croatian Radiotelevision (HRTV), where he promoted Tuđman and the HDZ, working hard to prevent any criticism of government on the programme, while Croatian opposition parties were ignored.
Split into simpler sentences: A few months later Vrdoljak was appointed to the post of general manager of Croatian Radiotelevision (HRTV). There, Vrdoljak helped promote Tuđman and the HDZ, working very hard to prevent any criticism of government in the programme, while Croatian opposition parties were ignored.