Thomas J. Taffe was officially appointed chief of the MTA Police Department Wednesday, having served as acting chief the past four months.

“It’s an honor to lead the MTA Police Department and I look forward to continuing to serve the millions of New Yorkers who rely on this department to keep the transportation system safe,” Taffe said in a statement.

MTA Chair and CEO Janno Lieber said Taffe brings decades of experience to the role.

“With his 30 years of law enforcement experience, including an exceptionally strong background in strategic management, I have no doubt Tom Taffe is the right person to steer the MTA PD,” Lieber said in a statement. “Customers can ride with confidence knowing there’s top-notch, capable leadership in place at all levels in the department.”

Taffe, who also served as MTA police chief of operations for more than two years, will oversee the department’s more than 1,400 members and 12 units responsible for patrolling and securing MTA property.

Twenty-five other members of the department were also promoted at the ceremony Wednesday.

Taffe, who was born and raised in the Bronx, joined MTA police after serving more than 27 years in the NYPD. He graduated as valedictorian of the police academy in 1996.

During his time as MTA police chief of operations, Taffe developed plans to establish the department’s first police academy.

The MTA Police Department was formed in 1998 with the consolidation of the Long Island Rail Road and Metro-North Railroad police departments.

In 2005, the Staten Island Railway Police Department merged with MTA police, and in recent years expanded patrol operations in NYC subways and on the MTA-managed bridges and tunnels.