How One Tech Team Cut Engineer Attrition from 40% to 8% by Fixing On-Call Rules

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A technology team lost three senior Site Reliability Engineers within six months, with exit interviews consistently citing unsustainable on-call demands as the primary reason. The team introduced structured reforms including a cap of two pages per eight-hour on-call shift, timezone-based overlapping shifts to eliminate late-night alerts, and financial compensation for off-hours disruptions. Engineers were also given a toil budget capping operational work at 30% of their time, with automatic removal from on-call rotation if that threshold was exceeded. Within six months, annual attrition dropped from 40% to 8%, off-hours pages fell from 12 to 2 per week, and the team estimated saving roughly $400,000 per year in recruitment costs. The findings, shared by Dr. Samson Tanimawo, argue that on-call wellness is a financial imperative rather than an optional benefit, given that replacing a senior SRE can cost between $150,000 and $200,000.

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