His writings first graced the print media in 1946, when he joined the Manila Tribune as a sportswriter and police beat reporter.
However, his succeeding show, "Firing Line" on the GMA channel, would prove durable and eventually attain international recognition.
It employed instead a format involving Benigno and his co-host grilling for an hour a solitary guest, normally a leading Filipino political figure of the day like Miriam Defensor-Santiago in 1992, but sometimes the occasional foreign dignitary such as Margaret Thatcher, Henry Kissinger, Willy Brandt, and Zbigniew Brzezinski.
After "Firing Line" was ended coinciding his retirement from television in 1999, Benigno continued to write his column with the Philippine Star, which was regularly published for nearly sixteen years up until weeks before his death.
Benigno's writing style became especially pointed in the last few years of his life, as he emerged as a bitter critic of Presidents Joseph Estrada and Gloria Macapagal Arroyo.