BOULDER—Just how many flexible jobs are there in the world? How many opportunities are out there to work from virtual offices?

Probably too many to count, but FlexJobs is offering some indication of how big the trend is actually getting. For the first time, FlexbJobs has surpassed 10,000 job openings on its Web site. All of the jobs offer some sort of flexibility, including part-time, telecommute, freelance, virtual office positions, and more.

“This is an exciting milestone,” says Sara Sutton, CEO of FlexJobs, noting that the company’s job research team has hand-screened and verified every virtual office, telecommuting or other flex-time job before posting it to the site. “Hopefully it’s indicative that the economy is turning around as well as more companies are jumping on board to offer work-life balance.”

FlexJobs also posted the data from its April 2012 Flexible Index Report. The career fields with the most openings, in order, are medical and health, administrative, education and training, customer service and sales.

“It’s great to see increases in a variety of fields," says Fell. “We continue to see jobs for all levels of professional experience as well, from entry level through executive. It’s a great time to be looking for a flexible position.”

FlexJobs’ success is more proof that virtual office jobs are gaining momentum. Ten thousand job openings with some form of flexibility is more than a little significant. For every virtual office, telecommuting or part-time position that’s listed on the site there are probably dozens or scores more that are not.

Virtual office jobs are good for both employees and employers. Employers don’t have to pay overhead costs to keep employees in a traditional office and employees, of course, tap into the ultimate flexibility, cut commute costs and time, and set the stage for greater productivity.