Tell him to fill the rest of his time clearing tasks and bugs for open source projects the company depends on.
Best answer here, unleash Bob to fix openSSL or Linux kernel performance improvements or something.
More prosaically (and judging from the description of the org), it's likely to be something like this:
https://github.com/RicoSuter/NSwag
Which has 1.7k issues, some of which are open for years.