The Long Island economy had 14,700 more jobs in January, compared with a year earlier, the state Labor Department said Thursday.

The latest report shows growth in public-sector employment, which until last year had mostly declined since 2011 because of local public-school layoffs. The sector expanded by 1,900 jobs, while the private sector added 12,800.

Revisions for 2014 showed that the Island's employment market expanded more slowly than previously estimated. By December, job growth had trickled to an increase of just 600 jobs year over year, compared with the Labor Department's estimate of 13,700 published earlier this year.

But job counts in some of the higher-paying sectors on the Island last year were revised upward. For example, new data showed that the local government education subsector gained public-school jobs from August through December, reversing estimates that had shown year-over-year losses for those months. The gains were the first since mid-2011.

"It's good that we are starting to reinvest in our local education system," said Shital Patel, labor-market analyst in the department's Hicksville office.

Each month the Labor Department issues local job estimates drawn from a statewide survey of 18,000 businesses. It later revises those data using the much more expansive rolls of employers covered by unemployment insurance.

The department uses year-over-year comparisons because the data aren't adjusted to reflect seasonal swings in employment.

Even in some sectors where employment has been shrinking, such as financial activities, employers are still hiring. John Viteritti, the Melville-based regional manager of New Penn Financial, a Pennsylvania-based mortgage banker, has hired four sales employees in the past six months, bringing the office total to 26. He said that both lower housing prices and interest rates have increased demand for the company's services.

"We're able to get more deals done because of those factors," he said.

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In November, Viteritti hired Greg Nouza, a New Penn sales manager. Before New Penn, Nouza, 37, worked at Citibank as a home lending officer in Massapequa. But the Suffolk County resident wanted a change and posted his resumé on Indeed.com. The next day he received a call from New Penn.

The secret to having mobility, he said, is to have a "killer" resumé that lists accomplishments.

"Specifics help separate you from other people," he said.

The Long Island job market had a total of 1.26 million jobs in January, up from 1.25 million a year earlier.

The Labor Department will release the January unemployment rate on Tuesday.