LinkedIn, a treasure trove of easily accessible personal information and company IT data for targeted attacks:

"InSpy is a Python-based LinkedIn enumeration tool with two functionalities: TechSpy and EmpSpy. TechSpy crawls LinkedIn job listings for technologies used by the target company. InSpy attempts to identify technologies by matching job descriptions to keywords from a newline-delimited file."

"EmpSpy crawls LinkedIn for employees working at the provided company. InSpy searches for employees by title and/or department from a newline-delimited file. InSpy may also create emails for the identified employees if the user specifies an email format."

https://tools.kali.org/information-gathering/inspy