Monster Worldwide laid off an undisclosed number of workers Tuesday, and closed its operations in Brazil and Mexico.

One report put the number at 800, while a Twitter post simply described it as “massive.”

A company representative confirmed there were layoffs, but offered few specifics. In an emailed statement, the representative said:

Consistent with previously announced plans during the company’s Q3 earnings call to concentrate resources on business in North American and key European and Asian markets, Monster has taken a number of corporate restructuring initiatives to strengthen our core markets and increase the company’s profitability.  This includes pursuing a sale of our China HR business, closing operations in Brazil and Mexico and restructuring our global workforce to reduce our operating expenses.  Monster remains committed to providing leading talent recruitment solutions to our customers in more than 40 countries.

Last month, Monster officials said during the company’s 3rd quarter financial call with investment analysts, that layoffs were likely in the future. CFO Jim Langrock said during the call that the layoffs would come in the development area, a consequence of both the completion of the company’s latest search and cloud technology projects, as well as the decision to cut costs.

A previous layoff last January involved about 400 workers.

Monster has been struggling for several quarters, announcing earlier this year that it was reviewing “strategic alternatives,” Wall Street code for selling the company or parts of it. Last month, Monster said it would seek to sell its Asian job board ChinaHR, and would shutter or sell off other operations.

Its stock is currently at about $5.50 a share, down about 2.6% today.

Careers site operator Monster Worldwide is announcing this morning a corporate restructuring that will have the company pulling back from some of its global markets, particularly China where it be looking to sell its ChinaHR job site.

Company officials discussed the restructuring this morning in a conference call with investment analysts after releasing Monster’s 3rd quarter financials showing revenue down in every category, but still managing to earn 9 cents a share exclusive of one-time expenses.

The bad news in the financial report is that revenue was down almost 11 percent overall, with the biggest hit coming from operations outside North America. Revenue there was down 15.3 percent. But even in North America revenue declined, down 6.3 percent. In contrast, CareerBuilder reported it grew its North American revenue by 5 percent to $169 million.

Propelled by its flagship tech site, Dice Holdings this morning delivered a financial report so strong it sent the company’s stock up 12 percent.

The company, the first of the publicly traded career sites to report, said it earned 17 cents per diluted share. That beat Wall Street’s average estimate of 12 cents. Dice also reported revenue of $48 million, an increase of 2.6 percent over the same quarter last year and a million more than analysts were expecting.

CareerBuilder, which is privately held, voluntarily reported revenue of $169 million from its operations in North America. That’s a 5 percent increase over the 3rd quarter of 2011. The company doesn’t release other revenue numbers or earnings. LinkedIn will report on Nov. 1.

Monster, curiously,  has yet to set a date for release of its numbers. Typically, the company would have done that by now. It also would typically report its numbers this week. There were rumors of a possible sale to (among others) the German media company Axel Springer. The company denied the reports this week.

Dice Holdings, meanwhile, is looking ahead to a strong finish to the year, and product improvements and growth next year.