Mayoral fundraiser Ross Offinger was a reliable fixer for donors and other mayoral associates who sought jobs, invites to mayoral events and other special favors from City Hall, according to newly-obtained emails.

When Lee Wasserman of the Rockefeller Family Fund sought a job for a pal, he reached out to Offinger, the emails show.

The Fund gave $250,000 in February 2014 to the mayor’s political non-profit, the Campaign for One New York — for which Offinger also handled the fundraising.

“Do you think someone on your team could talk to the [redacted] for a[n] informational interview?” Offinger wrote to the mayor’s Office of Appointments on June 12, 2014. “Would be super helpful! Lee Wasserman from the Rockefeller Foundation is asking.”

The emails show the unidentified candidate was called and assessed by the administration, but don’t reveal the final outcome.

Offinger was also consulted on invite lists for events ranging from a Greek Independence Day celebration to the appointment of the commissioner of cultural affairs.

Additionally, Offinger helped bigtime de Blasio bundler James Capalino get invites for 10 of his clients and associates to the mayor’s April 10 speech marking his first 100 days.

Just days later, Offinger went to bat for deep-pocketed donor Jona Rechnitz, who has since pled guilty to bribing NYPD and city ​officials.

Ahead of a barbecue at Gracie Mansion for the 2016 Democratic National Convention selection committee, Offinger emailed the mayor’s office with the subject line: “Have a big donor friend of Jona Rechnitz who wants to come tonight.”

The email asks, “Can we make an exception?” for philanthropist Russell Galbut, whom Rechnitz wanted to bring along.

Despite noting that the event was “WAYYYYY over capacity,” the director of special projects approved the extra guest.

Even when it came to landing something as benign as a summer internship, Offinger’s endorsement made all the difference.

When the Department of Education didn’t offer a position to Offinger’s candidate, the mayor’s office intervened with its own request.

“I wanted to check back on the application I sent your way back in April for [name redacted]… She was referred to the city internship program via the Finance Director for the Mayor’s campaign,” wrote Jocilyn Burke, manager of internships in the mayor’s office in may 2014.

“Can you please take another look and let me know if she would be a good fit for any of your spots and if so, can someone reach out to her?”

The response Burke got back from a DOE administrator was, “I will reach out to her today.”

Asked Wednesday whether it was appropriate for Offinger to have such close dealings with City Hall, de Blasio noted that the convention committee event needed to demonstrate support from fundraisers.

“So it was natural… that someone in that position would provide names of people who should be invited to such a meeting,” the mayor said at an unrelated security briefing at police headquarters in Lower Manhattan. “I think that’s quite normal.”

Wasserman clarified to The Post that the position was a nonpaying internship for a college student.

Offinger didn’t respond to requests for comment.