He returned to the NBL with the Downer-coached Rams last season, having missed the opportunity with Taranaki 12 months earlier because of the pandemic's impact on the 2020 season.
A highlight of his career has been selection for the New Zealand Select (Academy) team trip to Las Vegas, which saw him attracting some interest from US NBA clubs.
Strong performances in the 3x3 format sees him highly ranked on the national stage, and Downer says he played a key role off the bench, with great impact leading the reserve squad.
"It is this leadership, mixed with hard work, talent and a great understanding of the game, which was a big part of the recruitment process," says Downer for the Hawks coach. "Derek is one of those guys that you're just happy to go into battle with."
"He brings an infectious energy, is a great motivator and leader for all players, and in the community with our rangatahi," the coach says. "He has a great understanding of the game and plays like a coach on the floor."
Albertsen's signing follows the previously announced signings of returning players Ethan Rusbatch, Derone Raukawa and Jordan Hunt, and the recruitment, also from the Rams, of Quintin Bailey.
Downer said he's not aware of any New Zealand players that have signed with other clubs for the new season.
Meanwhile, the uncertainty of the pandemic has pushed the start of the season back another three weeks.
Originally scheduled to start in early April, including a match-up of 2021 finalists the Wellington Saints and the Hawks, it's now set to start on April 28, the Hawks now tipping-off with a Sunday afternoon home match against the Franklin Bulls on May 1.