A Manhattan cleaning woman recounted Thursday how she miraculously survived the massacre at a Park Avenue office building — coming face-to-face with the deranged killer and pleading for her life.

Sebije Nelovic described how gun-toting maniac Shane Tamura opened fire anyway, forcing her to run for her life, bullets zipping around her until she found shelter in a nearby closet at the offices of Rudin Management on Monday.

“This guy came in the middle of the door and pointed his gun at me,” Nelovic said in a statement released by her union, recalling the horror.

“He started shooting around me. I put my hands up and said, ‘I’m the cleaning lady, I’m the cleaning lady!'” she recalled.

“But I realized — he comes with a machine gun. He’s not going to know who I am. He’s going to shoot, no matter what.”

The terrified 65-year-old cleaner said she started running down the hallway of the 33rd floor offices, finding a closet and locking herself inside.

“I started praying,” she said in the statement.

In the hallway outside, Nelovic said she could hear shouting.

Then, “he started shooting,” she said. “He shot the door to the closet and I was so scared, but I was OK. I heard him walk down the hallway.”

That’s when Nelovic said she remembered Julia Hyman, a 27-year-old associate at Rudin Management who typically worked late, often until 8 or 8:30 p.m.

“I knew she was at her desk and I thought, ‘God, help her.'”

Hyman, a beloved Cornell University graduate, tragically became Tamura’s last victim before the sick killer turned the gun on himself.

Horror-struck Nelovic, a member of 32BJ of the Service Employees International Union, said her supervisor then began to call and text her to find out if she was safe.

“I told him I was in a closet, and he told me to stay there,” she recalled. “I got scared about making noise, so I turned my phone off. I sat in the closet for two hours, maybe three hours. I was praying.”

It wasn’t until police arrived that she knew she was safe — and learned the full extent of the tragedy that unfolded around her. 

Tamura, a disgruntled Las Vegas security guard, was targeting NFL offices in the building over perceived CTE injuries, but got off on the wrong floor, costing Hyman her life.

Also killed in the massacre were Blackstone executive Wesley LePatner, security guard Aland Etienne and 36-year-old NYPD Police Officer Didarul Islam, a married father of two, all shot by Tamura in the lobby of the 44-story office tower.

Hyman’s death was particularly devastating to Nelovic – as the young staffer always made it a point to seek her out to say goodnight before leaving the office, regardless of the hour.

“She was so nice,” Nelovic said. “I feel so sorry for her. I feel so sorry for everyone.”

Hyman, of the Upper East Side, had been with Rudin for less than a year, and was making her mark. 

“She was a hard worker,” Siva Subramaniam, whose daughter roomed with Hyman in college, said during her funeral at Central Synagogue in Midtown on Wednesday.

“She was first in, last out.”

Nelovic said she continues to struggle with the nightmarish loss.

“Every day, I get more stressed and shaken,” she said. “A woman is dead on my floor — and it could have been me. 

“I used to get scared to go home on the train at night. But going to work, I wasn’t scared,” she added. “I was safe there, I was happy for 27 years.”

— Additional reporting by Reuven Fenton