It is a major vote of confidence for Savage who was appointed to the role following the London 2012 Olympics.
He has guided the sport's High Performance team throughout a re-building phase over the last three-and-half years in what has been an encouraging, rewarding build up towards this year's Rio Games.
The re-appoint comes under the direction of newly appointed CEO Miles Stewart and a Triathlon Board that recognises the solidarity of investment in the sport's high performance pathway.
"We're excited to have Bernard secured until Tokyo 2020, this brings stability to our existing program and ensures our future is in good hands. The ASC, AIS, coaches and athletes all hold him in high regard and his signature was a priority for us in our future pathway," said Stewart.
Triathlon Australia is looking to the future and focused on the path ahead, which includes securing key people for roles that will deliver results.
"Bernard plays an integral role in the next evolution, we are looking forward to providing stability to the program and moving into the next Olympic cycle," added Stewart.
The appointment is another positive outcome for Triathlon Australia as they continue their direction on the retention and acquisition of the very best candidates that will align with their strategic plan for the next four years.
"I look forward to working closely with him and enjoying the success of our athletes through a very exciting period for our sport," he said.
Savage and his High Performance team will continue to implement the progression and changes required to ensure Australia's future in the highly competitive world of triathlon.
"I have thoroughly relished the challenge so far and I'm looking forward to guiding the sport even further over the next four years," Savage said today, as Australia's Olympic hopefuls prepared for Saturday's WTS round on the Gold Coast.
"It provides continuity for our High Performance team and allows the sport to have a long term plan and it is encouraging to know that Board has given me the vote of confidence to get on with the job at hand.
"The board is obviously happy with the way we are heading and the steps and the direction we have taken so far to get to where we are now.
"It has been a solid phase of re-building over the last four years with some encouraging signs from our Juniors, through the Under 23s and Elites and the exciting National Talent Academy and Paratriathlon programs.
"To see the successes at last year's World Championships with Jake Birtwhistle winning the under 23 world title and the wins to Bill Chaffey, Katie Kelly and Sally Pilbeam in the Paratriathlon – it was very exciting.
"We are all keen to see the successes continue and it is great to have such a strong group of experienced coaches and developing athletes and a new generation ready to step up as we prepare for Rio and beyond to the ITU World Championships and Commonwealth Games both on the Gold Coast in 2018 and then the Tokyo Olympics in 2020.
"The Commonwealth Games Association has been one of our strongest supporters with its NextGen program allowing our future Elite athletes opportunities to train and race overseas which has been invaluable.
"Having the two major events on the Gold Coast will give the sport a huge boost. The Melbourne Commonwealth Games was an amazing experience and especially for the athletes with the home crowd lining the streets.
"We have some exciting talent coming through led by our reigning Australian Junior champions in Sophie Malowiecki and Matt Hauser and a host of others.
"It will be exciting to see how they all progress along with our established athletes as they continue to improve and seize the opportunities for the chance to lead the sport over the next four years.
"There will be changes and we want to ensure that we continue to build what is a modern, dynamic, professional sport."