One thing I might suggest is find out what open source products your customers are using and get Bob to contriubte to those products from his corporate account

One thing I might suggest is find out what open source products your customers are using and get Bob to contriubte to those products from his corporate account on behalf of your company. If the projects are related to the company's line of business it will increase the firms profile hugely, and make you the go-to company for those customers as they can't afford not to choose your expertise that they already depend on. Your company's revenue is part new business and part renweals. The open source product will be a funnel for converting the FOSS users to new customers, while locking down renewals in those customers who use projects he contributes to. Figure out your customers' stacks, and then pitch Bob on contributing to key libraries and technologies that underpin them.