To migrate to a new ATS, export your candidate, job and pipeline data, map the fields to the new system, and import into a test environment first. Reconnect job boards, HRIS and calendar integrations, recreate active requisitions, and run a short parallel period before retiring the old tool. Train the team and validate data and compliance after cutover.
Prioritize active candidates, open requisitions, and recent pipeline history — the data your team needs day one. Include candidate profiles, resumes, application status, interview notes and key communications. Older archives can be migrated later or kept read-only in the old system. Mapping fields carefully matters: a clean migration of the data you actually use beats a messy dump of everything, which clutters the new system and slows adoption.
Import into a test environment first and validate record counts, field mapping and attachments before going live. Keep the previous ATS accessible read-only until you've confirmed the new system is complete. Run both in parallel for active roles for a short window so in-flight candidates don't fall through. Assign one owner to spot-check high-priority pipelines after cutover. The losses people fear come from rushed, unvalidated cutovers, not from migration done in stages.
For active data and a handful of integrations, migration is often part of a few-days-to-few-weeks implementation. Volume, data quality and the number of integrations drive the timeline. Clean source data and a defined field map are the biggest accelerators; messy historical data with inconsistent fields is what stretches projects. Migrating only what you need first keeps go-live fast, with the archive handled afterward.
For a short window, yes. Running the old and new ATS in parallel for active requisitions gives you a fallback while the team learns the new tool and you validate data and integrations. Set a firm end date so the overlap doesn't drag on, freeze new activity in the old system once cutover is confirmed, and then archive it read-only for compliance and reference.
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