My colleague is a 64-years-old devops guy. He looks like 78, he sounds like 80, but his brain is working at full speed and his IT-knowledge is not only very cur

My colleague is a 64-years-old devops guy. He looks like 78, he sounds like 80, but his brain is working at full speed and his IT-knowledge is not only very current, but also backed by 35 years of experience. He is the most valuable guy in our team. Any company missing out on people like him is shooting itself in the foot.