Mr Trought said: “When I was in prison, I had a lot of time to think about my actions and the repercussions were catastrophic for my family, friends and society.”
He said the support he received from a previous Balfour Beatty jobs fair helped him turn his life around and secured a job with Triplex.
John Burton was previously jailed for drug importation, tax evasion and money laundering, and released in 2017.
He said: “Crime doesn’t pay, you will get caught. While I was in prison I said to myself I must get rehabilitated because I wanted to support myself and my family.”
He has a company, Inside Connections, which is now managed by his children.
Mr Burton said his family had never been involved in crime and he was determined to turn his life around for them.