He saw an immediate response.
"I got hundreds of e-mails asking where I was going and saying they had ideas on where I should look," he says, adding that he also leveraged his accounts with online professional groups to cultivate job leads.
Hollander says he was careful about what he posted, making sure his comments accurately reflected the goodwill that existed between him and his former colleagues at CA. In fact, he had co-workers and managers write recommendations to post on LinkedIn, which helped him in his job search, he says.
Now at IBM as a consulting IT specialist, Hollander says he has kept many of his former colleagues as LinkedIn contacts, thinking he could pay back all the help he received. At the same time, he realized that some contacts important for his old job wouldn't be as relevant moving forward.
Separately, he says, the job change felt like a good time to make a stricter delineation on Facebook between work-related contacts and personal ones. So he discreetly defriended some Facebook contacts who weren't really friends.
Hollander is on the right track, says John Reed, executive director of IT staffing firm Robert Half Technology of Menlo Park, Calif. As a professional, you should always be selective about your connections and resist the urge to connect digitally with every single co-worker you're leaving behind.
Reed recommends limiting your business network to those whose own professional sphere overlaps with yours — either by industry or discipline. "As your career develops, the relevance of your network will change, and you want to keep your list of contacts relevant," he says.
Why not just keep the old contacts hanging around? You can be judged by the company you keep online. Do you really want to connect with past colleagues you barely know if you can't vouch for their work reputation? He says it's better to keep social acquaintances and friends, even work buddies, as Facebook friends rather than LinkedIn contacts.
Finally, reminds Sean Ebner, regional vice president for IT services provider Technisource, "It's best to leave an organization quietly and with everything positive. That post on Facebook saying 'It's a great day — I just quit my job!' is going to hurt people's feelings." And possibly your reputation.