It’s not uncommon for people, including your clientele, to switch careers. By applying the “Past Not Current” filter, you can find contacts who formerly worked for a company that is now one of your clients. It could go something like this: “I noticed you’ve moved on from [previous firm name]. For research purposes, may I ask what [new firm name] is employing for its [solution you provide]? Using the reach of LinkedIn, you can expand your business by tapping into your existing clientele.