Siewert admits that he has already identified players he would like to sign in the summer transfer window.
"Everyone is focusing on what we can do, and we have to look at players for next season," the Terriers said. "I have looked at players I would like to bring in.
"I have made decisions on some players and I am still learning. We still have games to go. In every game you can impress a manager, so for me I am still looking. This is important.
"At the moment I am working with our head of recruitment and I am focusing on each possibility and our timescale."