WASHINGTON (NewsNation Now) — A former Department of Homeland Security official who penned an op-ed and book under the pen name “Anonymous,” which criticized President Donald Trump, made his identity public Wednesday.

Miles Taylor, a former chief of staff at the Department of Homeland Security says in a tweet: “Donald Trump is a man without character. It’s why I wrote ‘A Warning’ … and it’s why me & my colleagues have spoken out against him (in our own names) for months. It’s time for everyone to step out of the shadows.”

Taylor has been an critic of Trump’s in recent months, and he has a contributor contract on CNN.

Taylor’s anonymous essay was published in 2018 by The New York Times.

In the essay, the person, who identified themselves only as a senior administration official, said they were part of a secret “resistance” force out to counter Trump’s “misguided impulses” and undermine parts of his agenda.

The author wrote, “Many Trump appointees have vowed to do what we can to preserve our democratic institutions while thwarting Mr. Trump’s more misguided impulses until he is out of office.”

The author, penned a follow-up book published last November called “A Warning” that continued to paint a negative picture of the president.

Trump “stumbles, slurs, gets confused, is easily irritated, and has trouble synthesizing information,” the author alleged, also citing racist and misogynist statements the author claimed Trump made behind closed doors.

Then-White House press secretary Stephanie Grisham slammed the author as a “coward” for hiding their identity, charging that they “didn’t put their name on it because it is nothing but lies.”

This is the least impressive, lamest political ‘reveal’ of all time. I worked with DHS officials while I was in the White House, and even I had to research who Miles Taylor was. He’s just another standard-issue arrogant, Washington, DC swamp bro who loved President Trump until he figured out he could try to make money by attacking him. He lied to Anderson Cooper on CNN in August when he denied being ‘Anonymous,’ proving that all he ever wanted to do was try and extend his fleeting 15 minutes of fame and squeeze a few more book sales out of the deal. By contrast, U.S. Navy veteran Tony Bobulinksi is not anonymous and is publicly pointing the finger at a real corrupt politician, Joe Biden, who schemed with his family to make millions from foreign business investors. The very fact that the Beltway media cared about and hyped up ‘Anonymous’ just emphasizes how derelict they are when they totally ignore the readily visible Biden pay-to-play scandal unfolding before their eyes.”

Hogan Gidley, Trump 2020 national press secretary