Labor's Rachel Stephen-Smith is poised to become the territory's next deputy chief minister in a major cabinet reshuffle prompted by the resignation of Yvette Berry.
Ms Stephen-Smith confirmed she would seek the deputy chief ministership when ACT Labor caucus met on Monday morning.
"I understand that I do have the confidence of my colleagues but that will be a matter for caucus to determine this morning," Ms Stephen-Smith told ABC radio.
The long-serving health minister would not be drawn on whether she would be the only candidate for deputy chief ministership.
Chief Minister Andrew Barr will hold a press conference at 1pm on Monday to announce who had been elected deputy leader and who had been elected to cabinet.
Caitlin Tough, the first-term member for Brindabella and government whip, is thought to be the most likely new entrant to cabinet.
Ms Stephen-Smith, a member of the party's Left faction and the current acting deputy chief minister, said she was grateful for the support of her colleagues but she had a "heavy heart" about the process.
"It was a really sad day on Thursday for all of us. Yvette has done a great job as deputy chief minister for almost 10 years," Ms Stephen-Smith said.
"She's been a real support to others in caucus and obviously to Andrew as chief minister and so, you know, it's not the circumstances in which, you know, any of us would want to be taking on new roles."
Ms Berry resigned from cabinet on Thursday after an ACT Integrity Commission report found her former chief of staff had engaged in serious corrupt conduct in the handling of a contract for a primary school upgrade.
The corruption investigation cleared Ms Berry of any wrongdoing but under the ministerial code of conduct, ministers must take responsibility for the actions of their staff.
Ms Stephen-Smith said the government had already responded to many of the systemic issues identified in the corruption report.
"I think Yvette has done exactly the right thing and she acted very quickly in doing so. Obviously, we've all known that the report would come out at some point but we didn't know what it would say and ultimately what the final report would say. So, I think it's for others to make their own judgments about that," she said.
"I think our government has learnt a lot from the Auditor-General's report into the Campbell School project and from even what we heard through the public hearings from the Integrity Commission."
