Rather than asking if and when an event will happen, it might be more useful to ask what percentage the probability is, and if there are agreements or karmas putting force behind its happening. For example, at a given moment, a person might have a sixty-two percent probability of getting a particular job. Nonetheless, people don't always keep their agreements, for a variety of reasons, and the person may not be hired. If, unexpectedly, someone comes along who seems better qualified or who is a friend of the company's owner, the probability might drop to thirty-seven percent, which is still fairly high, but, obviously, not overwhelming. This is an organic, ever-changing world.
Nothing is carved in stone.
Every significant choice a person makes can change relevant probabilities. We do not know for a certainty what the future will bring for ourselves, or for you. That makes the game of life much more interesting and challenging. If everything could be predicted ahead of time, we would all have to be automatons, and if we are expressions of the Tao, then the Tao would likewise be an automaton. Fortunately, this is not the case.