The former Rayo Vallecano answered an SOS from Hammers manager Nuno to join his staff after the Portuguese's appointment.
Asked about his situation, Jemez told Marca: "Nuno knows that I initially came here until the end of the season. He knows I'm a coach, that I enjoy coaching, and that while I can't say for sure if this will drag on because I don't know, nobody knows where football will take you.
"Trying to predict what will happen is impossible; my focus is on coaching. I came here with a contract until June 30th to try and help the team in any way we can to avoid relegation, and right now I'm not worried about what will happen because, among other things, the important thing is what we're focused on, what we have here in front of us.
"What I am clear about is that I want to be a head coach, to coach; it's what I've dedicated my whole life to, what I've done my whole life, and I want to continue doing it. But that doesn't mean that if the conditions, the situation, and the timing remain right, I can't continue working in my current position."
Sitting in 18th position on the Premier League table, West Ham host Leeds today in the FA Cup quarterfinals.