Approached by the Herald for comment, McMillan said both organisations were aware of his offending.
He was trying to move on with his life, he said. "I have turned my life around. This is something in the past that I'm dealing with. I'm doing as much as possible to put everything behind me."
In 2012, Judge Roy Wade convicted McMillan for sending the 12-year-old girl more than 400 text messages, many of which, the judge said, were "entirely inappropriate".
Examples included, "I want to hold you tight and be the lucky person to kiss you goodnight"and "lol how far have you gone with a guy?"
McMillan was working as a teacher aide at Blockhouse Bay Intermediate, where his mother was chairwoman of the board of trustees. His father is the chairman of the Auckland Softball Association.
Shaun Singleton, a board member of the softball association, where McMillan is employed as the community development officer, confirmed the convicted sexual groomer oversaw a Counties Manukau Sport primary school softball day in South Auckland two weeks ago with another association employee.
"His involvement on that day was fully supervised. It was games of softball rather than one-on-one coaching," he said.
"As a board, there's also a little bit of a social duty to balance the risk of re-offending with ... making sure Kevin is treated the same as every other individual ... From our perspective he's been given a chance under certain conditions and it's up to him."
Counties Manukau Sport chief Russell Preston said he wasn't told of McMillan's offending by Auckland Softball. "There's no doubt the parents hearing about it for the first time would have natural concerns."