Wright has confirmed that he was dismissed from his post with the Jamaica Anti-Doping Commission (JADCO) last November but the decision was not made public at the time.

Wright, who has more than 30 years experience in the field of anti-doping, had held the position since 2005 when JADCO was first set-up.

"They didn't say why," Wright said when asked by Jamaica Observer why he was no longer working for JADCO.

"They just said they are restructuring."

His dismissal, he has revealed, came only after a few days after giving the BBC an interview in which he was quoted as claiming Jamaica's recent rash of failed drug tests might be the "tip of the iceberg".

Eight Jamaicans, including former world 100 metres record holder Asafa Powell, three-time Olympic champion Veronica Campbell-Brown and London 2012 silver medallist Sherone Simpson, failed tests last year.

Campbell-Brown has subsequently been cleared after taking her case to the Court of Arbitration for Sport but Powell is facing a two-year ban if found guilty when the decision into his case is announced next month. 

Former world 100 metres record holder Asafa Powell is among several top Jamaicans implicated in drugs scandals since London 2012 ©Sports Illustrated/Getty Images

"There is no successful whistle-blower who is not a pariah," Wright told the Jamaica Observer. 

Wright's criticism of the testing system in Jamaica followed similar comments from JADCO's former executive director Renee Ann Shirley in the influential American magazine Sports Illustrated. 

She had claimed that just one out-of-competition test was conducted in the six months leading up to London 2012, where Jamaica won 12 medals, including four gold.

The criticism prompted the World Anti-Doping Agency (WADA) to send a high-level delegation to carry out an emergency audit of Jamaica's drug testing procedures.

It also prompted the mass resignation of the organisation's executive management, including chairman Herb Elliott.

Since then a new Board of Directors, led by successful businessman Danny Williams, has been appointed by Jamaica's Ministry of Sports.

News of Wright's departure coincided with the announcement that JADCO is partnering with the Canadian Centre for Ethics in Sport (CCES) and WADA to further improve its systems.

"Currently, the restructured JADCO, working in concert with its recently appointed  chairman and commissioners, continues to refine and upgrade its operational procedures by recruiting employees to meet its required staff complement, as well as to restructure and increase its public education and testing procedures," JADCO said in a statement.

But the Government agency has also warned that it will need an increase in its budget if it is to fulfil its commitments.