Adam Haber, a Democratic businessman who unsuccessfully sought the nomination to run for Nassau County executive, launched his bid on Thursday to unseat Republican Sen. Jack Martins.

Haber, who filed a campaign finance committee with the state Board of Elections this month, had been reportedly considering running since the beginning of this month.

“As a small business owner and entrepreneur I know how to find practical, effective solutions that will move Long Island forward,” said Haber. “I’ll stand up for Nassau taxpayers and fight to pass the Women’s Equality Act.”

His candidacy also has received the blessing of Democratic Senate Campaign Committee Chairman Mike Gianaris of Queens.

“Adam will work to bring critical tax relief to Long Island and the seventh district, and he’ll fight for women’s equality and educational reform. I’m confident he’ll make an excellent Senator and we look forward to working with him in Albany next year,” Gianaris said.

Martins won the Nassau County district in 2010, narrowly unseating Democrat Craig Johnson, who is often considered an unofficial member of the Independent Democratic Conference and has led IDC Leader Jeff Klein’s fundraising efforts.

Martins in 2012 won by a 5,000-vote margin against Democratic candidate Daniel Ross, a surprisingly close result considering how little-watched the race was.