The On-Call Handoff Shadow Shift for New SREs

New SREs shadow before they own. The two-week shadow program, the weekly checkpoints, and the graduation criteria.

Week 1: silent shadow

Week 1 is observation only. New SRE joins every page in the rotation, observes without acting, asks questions in 1:1 debriefs after resolution. End-of-week session captures what they observed and what surprised them, which is where the real learning lives.

• Joins every page; observes only. Silent presence on every alert. Does not act, does not respond, does not slow the response.
• 1:1 questions afterward. Post-resolution debrief per page. Context grows without interrupting the live response.
• End-of-week debrief. "What did you observe, what surprised you" session per week. Explicit learning rather than ambient absorption.
• Documented exposure log. Captured list of incident types the new SRE observed. Supports the week-2 prep conversation.

Week 2: assisted action

Week 2 is assisted ownership. New SRE responds first, senior on-call is backup, senior steps in if the response goes sideways. Real ownership of decisions, real fallback for rescue. End-of-week assessment determines whether they graduate or repeat.

• New SRE responds first. Takes the lead on every page. Senior on-call available as backup.
• Senior steps in if needed. Real safety net, not just passive observation. Senior owns the rescue.
• Real ownership plus real fallback. New SRE owns the decision; senior owns the recovery if the decision was wrong. Both pieces present.
• End-of-week assessment. Senior's "ready for solo?" call. If not, extend the shadow rather than push through.

Graduation criteria

Graduation requires concrete checkpoints, not vibes. One sev-2 handled with assistance, top-5 rotation-specific runbooks known, senior on-call sign-off. Documented graduation note captures the "ready because X" reasoning so later review has the breadcrumb.

• One sev-2 with assistance. Demonstrated capability under real load. Real incident, real assistance available.
• Top 5 runbooks known. Rotation-specific coverage of the most-used runbooks. Drives confidence on the most likely paths.
• Senior on-call sign-off. Named approval. Accountability for the readiness call lives with someone specific.
• Documented graduation note. "Ready because X" record per graduate. Supports later review if questions arise about the readiness call.