<prompt> Human: Ive been working at my current job for more than 16 years, but recently a former boss contacted me about a possible position at his current company. Id be doing more or less exactly what Im doing right now except at nearly twice my current salary. Ive already started the process of applying, and even though he assured me that Im more than qualified and will probably get the job, hes not the one hiring so its not a sure thing yet.My question is, when and how do I approach my current employer to let them know whats happening? I know its a long shot, but I want to at least give them a chance to match the new salary and keep me because I do genuinely like working here. So do I wait until I have a concrete offer from the other company, or do I tell them whats going on now before Im 100 sure that I even have a new job waiting for me?  <response>: After youve signed your acceptance of the new job at the new company. 