Dale Caldwell, the lieutenant governor of New Jersey, resigned from his position on Friday, after the release of a report accusing him of sexually harassing a female staffer, among other ethics violations.

New Jersey’s governor, Mikie Sherrill, announced on Friday afternoon that Caldwell had submitted his resignation to her earlier in the day.

The decision by Caldwell, 66, came one day after Sherrill called on him to step down after an investigation determined he violated state ethics rules and engaged in behavior that constituted sexual harassment.

The 61-page report said it found credible evidence that Caldwell made romantic advances toward a female staffer’s friend, tried to secure a promotion for his girlfriend and gave tickets to personal guests without reimbursement.

The New Jersey Globe was the first to report on Caldwell’s resignation.

Sherrill, a Democrat, said she would appoint the state’s acting comptroller, Shirley Emehelu, as the acting lieutenant governor.

The change-up comes just weeks before midterm elections, which the lieutenant governor is responsible for overseeing.

The New Jersey governor initiated an investigation into Caldwell in May after receiving an anonymous letter that accused him of “bringing uninvited female guests to events while traveling using taxpayer funds” and “hitting on women at functions”.

Ultimately, investigators concluded that aspects of the allegations were credible.

In one instance, investigators said Caldwell made a romantic advance toward a female staffer’s friend and then made a “derogatory or demeaning reference” about women after his advances were rebuffed.

Caldwell allegedly told the staffer that women like them were ambitious and successful and needed a man in a position to help them, “but you young women are looking for young sperm”.

Investigators also found that Caldwell advocated for the promotion of his girlfriend, a state employee, to a “senior leadership position”. Caldwell acknowledged that he did not disclose the nature of his relationship with the state employee until he was confronted.

Caldwell had pushed for his girlfriend’s promotion, even after being informed he was under investigation. Ultimately, she did not get the promotion and no longer works in state government.

Credible evidence also determined Caldwell brought at least three personal guests, including his girlfriend, to ticketed events, in his capacity as lieutenant governor, without advance authorization or payment.

After Sherrill announced the report’s findings and called for Caldwell to resign, it was unclear whether or not he would step down.

A lawyer for Caldwell initially called the investigation “one-sided” and said the report’s findings were “palpably deficient and create a dangerous and challenging precedent for anyone who wishes to defend against anonymous conjecture and character assassination”.

As lieutenant governor, Caldwell was also serving as New Jersey’s secretary of state, who is the chief elections officer.