Cookson is seeking a second term as the UCI President, but is being challenged by the organisation’s vice-president David Lappartient.

The Frenchman is Cookson’s sole rival for the post, after the nomination deadline passed on June 22.

Cookson, supported by London-based firm Vero Communications when he beat Pat McQuaid to become UCI President in 2013, hopes Calacus will boost his bid for a second term.

"Calacus has a strong international reputation in the world of sports communications and I am confident that their support will be hugely beneficial to my campaign," said Cookson.

"David Alexander has worked at the highest level in sports journalism as well and he and his team will be invaluable as I seek to win a mandate to build on my first four years as UCI President."

Cookson has vowed to drive growth across all cycling’s disciplines, accelerate international development and champion cycling for transport and leisure should he secure a second term.

He has also pledged to continue to restore the credibility of the sport.

Calacus managing director David Alexander claimed the UCI have made strong progress in Cookson’s four years in charge.

"Calacus works with a wide range of sports administrators, rights holders and sponsors and we are delighted to have been invited to work with Brian Cookson on his re-election campaign," he said.

"Cycling has gone through some challenging times over the years and the fact that they have now been handed four more medal events at the Olympic Games in Tokyo in 2020 is a testament to the progress the UCI has made under Brian Cookson’s leadership."

Calacus include the International Boxing Association, International Olympic Committee Executive Board member Sergey Bubka and the Laureus World Sports Awards among their sporting clients.

The election is due to take place at the UCI Congress in Bergen in Norway on September 21.

Cookson has already questioned the detail in Lappartient’s plan for the future of cycling following confirmation of his candidacy.

He claimed he does not understand his rival’s assertion that recent reforms to men’s professional cycling had failed to meet challenges faced in the discipline.

Lappartient has claimed he has become aware of a "significant desire and need for change in governance expressed by national federations in recent months", with the Frenchman asserting that his manifesto displays a "real ambition" for cycling.

He has prioritised strengthening the authority of the UCI with "real and effective leadership", which would place the organisation at the service of National Federations, "making cycling a sport for the 21st century".

Developing an ambitious vision for professional cycling and ensuring credibility of sporting results and protecting athletes are also part of the "five pillars" in his manifesto.