Today sees the culmination of an impressive journalistic career having covered some "extraordinary stories".
"I will miss working with some wonderfully talented and hardworking colleagues," he said.
"I am grateful too to the listeners and viewers who have given me their time and attention over the years.
"I hope to have repaid that trust with reporting that was relevant, fair and accurate."
When the Dubliner was a pupil in Newpark Comprehensive School, work experience during his Transition Year set him on the path to journalism.
His teacher at the time was a young Vere Wynne Jones, who rang the Irish Times on his behalf.
This introduction was his first foray into his remarkable media career.
After studying media, Mr Dobson ventured into pirate radio, joining the newsroom team in Radio Nova.
In 1996 Mr Dobson was appointed anchor of the Six One news - a role he enjoyed for 21 years.
During that time, he cites covering the first free elections in South Africa as one of the standout moments.
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He witnessed history on the night the Good Friday Agreement was announced, he was live on-air when the twin towers collapsed in New York in 2001 and he covered the historic visit of Queen Elizabeth II.
His 2006 interview with then Taoiseach Bertie Ahern was particularly significant, as he forensically quizzed him on his finances. It was an interview that would cause shockwaves.
After that he took the helm at News at One where he presented the programme throughout the Covid pandemic.
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