Worked for a IT managed services place that made staff pull 24+ hrs non stop regularly. I walked away from that career and spent years recovering from a 38 hr shift where I was begging my managers to get me relief. "Your the only guy that knows this well enough" is a sign you work for a failing organization pinning that shit on you. I learned that the "business" and sales dudes absolutely will trade your health/lively hood for a few extra bucks on commission.