Veteran goalkeeper Ben Rennie is among four additions to the 2022 Kookaburras squad as the side builds towards this year's Commonwealth Games.

An initial squad of 23 was announced last year, but four more names were added on Wednesday to the 2022 contract list.

Uncapped Rennie, who is 31 years old, looms as the feel-good story given he is yet to make an appearance for the Kookaburras.

Livewire 19-year-old striker old Craig Marais, 20-year-old attacking midfielder Ky Willott and defender James Collins are the other inclusions.

Marais and Willott were both part of the Australia A team that competed in a series against the Kookaburras in Darwin prior to last year's Tokyo Olympics.

Rennie, who has represented Australia at an Indoor Hockey World Cup, is a mature-age selection to bolster the Kookaburras' goalkeeping stocks after Tyler Lovell retired last year.

"Both Ky Willott and Craig Marais impressed in the Sultana Bran Hockey One League at the end of 2019. Both came out of the national junior program and have had really good development in their home states," coach Colin Batch said.

"They have shown some real quality and are both smart hockey players. Potentially they can grow into really good players for the Kookaburras and we hope that happens."

"James Collins is similar in that he has been to the national junior camps and performed well.

"Ben Rennie is at the other end of the spectrum being a mature-age selection. An experienced goalkeeper, he has been the goalkeeper for Australia's Indoor hockey team.

"He has performed really well in that environment so he brings those skills into our goalkeeping line. We know at the Olympics last year the goalkeepers who performed best were aged 30 and above, so he brings a maturity to the group."

With the majority of the squad already in place, the Kookaburras' selection panel took their time to assess who would best complement the program with a focus towards this year's Commonwealth Games and also the longer term objective of going one better at the Paris 2024 Olympic Games.

"We spent more time on these four selections to make sure we get them right and we believe we have," said Batch, who guided the team to silver at the Tokyo Olympics.