Open-source Intelligence (OSINT) is the practice of using publicly available data to gather information on a target passively. If you work in Information Security or IT, OSINT is a great way to gain an advantage on landing that perfect job. Using OSINT techniques can help you discover the following on potential employers: - Know more about their technology stack so that you can match that to your experience during interviews. - Get a sense of the company's true IT & security maturity, without asking them. - Find red flags which can allow you to negotiate salary or even back away from a potential bad fit. Outlined below are a few tools and techniques which are useful for researching a potential employer. If you are happily employed, these tools can also to audit your own company's exposure. DNS Dumpster: dnsdumpster.com DNS Dumpster is one of my favorite OSINT tools, with it you can view DNS records to get a footprint of the company. You can find