If the posting does not include a deadline, the follow-up time is a little less clear cut. As a general rule, Salpeter says applicants should plan to follow up within a week after sending in the application. During that time, though, you should do a little legwork of your own. If you haven't already, try following and retweeting the hiring manager on Twitter or joining one of their LinkedIn ( LNKD) groups and posting something intelligent there. This way, when you do follow up, your name may be a little more familiar to that person. At the same time, you should do additional research into the company culture and see if you can find any additional details about the kind of candidates the hiring manager or the company in general likes to hire so you can work this into your follow-up note. "You want to say something inspiring when you follow up, not just, 'Hey, hope you got my application,'" she says. For job postings with or without deadlines, Salpeter says you can safely follow up by email one more time after the initial follow-up and perhaps call and leave a message just in case their email is completely flooded with applications. If that still doesn't work, it's time to look for other contacts inside the company who may be able to pass your resume along. Unadvertised job postings
Many jobs are never advertised. Instead, candidates have to reach out to people within the company about potential openings. But how aggressive should you be in following up about an email to someone you've never met about potential jobs that haven't even been posted? Salpeter says your best bet is to follow up three or four days after the first email just to make sure they got the message and to restate briefly why it's worth their time to meet with you or chat with you about life at the company and potential career opportunities. If that still doesn't work, Salpeter says you can follow up one more time just to ask if there's anyone else at the company who may be able to help with your request, but otherwise you should stop bothering the person and look for other potential contacts. After the interview
Once you land an interview, the follow-up process becomes a little more straightforward. Salpeter urges candidates to ask the interviewer how they prefer to be contacted and when they expect to get in touch. You should then follow up within 24 hours of the interview just to thank the interviewer for their time and to recap your conversation or note a detail you might have forgotten to mention. If you don't hear back, Salpeter says you should wait until a few days after the date the interviewer gave you and follow up once more. If you still don't hear back, you can try calling or emailing once more, but first, Salpeter recommends doing some digging to see if the company has announced a hiring freeze or if the person you've been in touch with has gone on leave. >To submit a news tip, email: email@example.com. Follow TheStreet on Twitter and become a fan on Facebook.