"He also has a great understanding of the high performance environment needed to make this happen, and is hugely passionate about swimming and nurturing young people to reach their full potential."
Olszewski said he is excited to take on the role and move to New Zealand.
"It's a real honour but I am under no illusions that it is a significant challenge and I hope to bring some of the things that have been successful for me into the New Zealand environment," he said.
His five key mantras are team culture, expectation, consistency, work ethic and attention to detail.
"I want to set the expectation of what the group brings to each individual and what each individual brings to the group. I will be setting expectations and not settling for anything less than their best.
"Obviously I am looking forward to working with some great staff and also with swim clubs and coaches around New Zealand to help create an environment where we can develop successful swimmers and good young people for years and Olympiads to come."