The forward averaged 12.8pts, 6.5rebs, and 1.4 blocks for Polk State but decided to embark on his professional career after a single season.
Not renowned as the most disciplined trainer Smith-Milner admits the demands of fulltime basketball initially presented a challenge.
"When I first got to Melbourne it was a bit tough but the more I got into it, the more I worked at it, the better I got. I've improved my game and I am just loving it right now."
8 kilograms lighter Smith-Milner has benefitted playing and training alongside the quality players in the Melbourne ranks.
Many had expected the 20-year-old to return to New Zealand to play in the 2016 Bartercard NBL having played the last couple of seasons for the Super City Rangers. However Smith-Milner will continue his development in Australia.
"I'm trying to sort out a SEABL team to play for, most likely in Melbourne, so I can keep working out with Adam Johansen and the other United coaches. There is a lot more opportunity in Australia with a lot more teams and with one of the NBL teams (Manawatu Jets) in New Zealand pulling out there are fewer spots for players right now."
When the next ANBL season begins in October Smith-Milner hopes to be back with United.
"Obviously the main goal is to get a roster spot in the next one or two years. I want to keep improving like I think I have done since I have been there, working out with the coaches, getting in the weight room and practicing with great players."
The one game Tall Black hopes in the future to add to his sole international cap, earned against South Korea in Tauranga in 2014, but for now he is focused on developing his game in Melbourne.