Once they have secured their position, they either transfer to another club or are released.
Those who are released will find work as assistants in another club or are employed by the NRL – for example as a referee advisor.
Given the average three quarters of a million dollars earnings they earn, along with the payouts of paid coaches, they can afford to sit for a year and wait for the inevitable opportunity to emerge.
The five coaches participating in a carousel that is about to stop have not done their most basic responsibility as an example to the players.
Seibold's behavior is most disappointed. He showed the minimum loyalty and maximum ambition of his time in the NRL.
Seibold left Storm when he could not get support from the development coach to the assistant; left Manly for one season and then switched to the same assistant role in Souths.
Twenty-four hours after the training coach Michael Maguire was released for the remainder of his contract, Seibold was appointed to office. Now leaving Souths, he leaves a club that gave him the first top job, after a year in a position.
Bennett has now broken the contracts in three clubs – Canberra (move to Brisbane); (to stay in Brisbane) and Newcastle (to return to Brisbane).
He also refused to agree to return to the dragons, causing the embarrassment of the Southern Party to act with them before deciding on the knights. Money has always been his main motivator.
Bennett knows that Broncos is in a pitiful position because of the possible instability that he could cause in 2019.
However, since Broncos started his departure by refusing his request for an extension in 2019, his latest package is not as treacherous as the performance of Ivan Cleary from West Tigers to Penrith.
It was widely reported that Cleary left the Tigers with two years left his contract because he wanted his coach's coach, Nathan, Penrith's No.7.
If Nathan is not as brilliant as the world seems to think and Ivan has to drop him, is not it?
Cleary also revealed that he wants to return to Penrith – the club that threw him out – because he has an "unfinished business". So his time on the Wests Tigers was "a finished deal?"
If it fails, it can claim to work at the best NRL excellence center with a huge paycheck and its mate as a club chair.
Trent Barrett did not break any contract by exercising his right to draw attention to Manly in July of not taking part in his election in 2019. However, he broke the golden rule of the game to stay there when the times are tough.
Why did he do it? Well, he knows he can go back to a training roundabout.
His replacement, Des Hasler, is returning to a club that was forced to dismiss him with the year he had left on the contract after signing up with Canterbury.
Since the owners of Manly, Penns, are afraid of losing, they do not like to pay two coaches.
If Barrett is paid not to lead a coach, it is likely that Hasler will have an incentive-based contract. Still, he will have to pay the contract from Canterbury to make sure.
The term "lifer" is usually associated with persons sentenced to imprisonment for long terms, which is hardly comparable to the coach and his millions of dollars.
No, they're political, with which coaches can best compare.
Today's politicians join a trade union movement or hold office positions in state or federal branches of the parties, and then win the preselection and eventually find themselves in Parliament.
Like coaches, they rarely have other life experiences.
And just like the image of politicians has fallen in the past decade with a number of changes in management, as well as the reputation of NRL trainers has declined for the same reason.
Roy Masters is a sports follower for the Sydney Morning Herald.