Zinc and Greenhouse integration: Automate background and reference checks in your ATS
Titus Juenemann •
October 23, 2025
TL;DR
This article details the Zinc–Greenhouse integration: what it does, who benefits, and the practical advantages of automating background and reference checks directly from your ATS. It covers technical data flow, compliance (including UK IDVT standards), typical turnaround times by region, setup steps, best practices, and metrics for measuring ROI. The conclusion: teams that need scalable, auditable, and faster screening—especially when hiring across borders or for risk-sensitive roles—will see meaningful time savings and process consistency; pairing Zinc’s verifications with AI resume screening (such as ZYTHR) further accelerates selection and improves resume-review accuracy.
Zinc’s integration with Greenhouse connects a global background- and reference-checking platform directly to your ATS workflow, enabling HR teams to request and receive verifications without manual handoffs. The integration automates candidate screening steps, centralizes reports in Greenhouse, and accelerates identity verification and criminal-record checks across 190 countries. This article explains exactly what the Zinc–Greenhouse integration does, who should consider using it, expected benefits, setup and compliance considerations, turnaround patterns by region, and practical tips to get the integration running smoothly while protecting data and reducing time-to-hire.
Quick overview: What the Zinc–Greenhouse integration does
- Single-click check requests Create background and reference check requests from a Greenhouse candidate record without exporting data or switching systems.
- Automated follow-ups Zinc automates candidate and referee follow-ups to reduce manual chasing and speed up responses.
- Centralized reports Completed verifications and detailed reports are attached to Greenhouse for auditability and onboarding.
- Global coverage Support for checks in 190 countries, including identity verification compliant with the UK IDVT Trust Framework.
How the integration works at a system level: When a recruiter triggers a screening action in Greenhouse, the candidate’s data is sent securely to Zinc via API. Zinc executes the chosen checks—identity, criminal record, and references—applies country-specific workflows, and returns a structured report and status updates back to Greenhouse. Data movement is typically limited to the fields required for the check (name, date of birth, identity documents, contact details). Zinc’s API updates the candidate timeline and stores the full report in the candidate’s Greenhouse profile for recruiters and hiring managers to review.
AI resume screener for Greenhouse
ZYTHR scores every applicant automatically and surfaces the strongest candidates based on your criteria.
- Automatically screens every inbound applicant.
- See clear scores and reasons for each candidate.
- Supports recruiter judgment instead of replacing it.
- Creates a shortlist so teams spend time where it matters.
| Name | Score | Stage |
|---|---|---|
| Oliver Elderberry |
9
|
Recruiter Screen |
| Isabella Honeydew |
8
|
Recruiter Screen |
| Cher Cherry |
7
|
Recruiter Screen |
| Sophia Date |
4
|
Not a fit |
| Emma Banana |
3
|
Not a fit |
| Liam Plum |
2
|
Not a fit |
Key benefits for hiring teams
- Reduced time-to-hire Automation and follow-ups reduce processing from weeks to days in many jurisdictions, shortening the final stages of recruiting.
- Consistency and auditability Standardized checks and stored reports in Greenhouse simplify audits, record-keeping, and compliance reviews.
- Global scalability 190-country coverage lets companies use the same provider for cross-border hiring, eliminating the need to manage multiple vendors.
- Higher confidence in hires Detailed reports and identity verification certified to the UK IDVT Trust Framework provide strong assurance for high-stakes roles.
Who should consider this integration
- Enterprise teams hiring internationally Companies scaling across regions that need a single, compliant provider for cross-border checks and consistent processes.
- High-volume hiring programs Talent teams running thousands of hires per year benefit from automation and reduced manual work.
- Risk-sensitive roles Financial services, healthcare, and security-sensitive positions that require robust identity verification and documented checks.
- Companies requiring fast onboarding Organizations where offer-to-start timelines must be short—Zinc’s faster turnaround minimizes delays.
Manual screening vs Zinc integration in Greenhouse
| Process area | Manual approach | Zinc + Greenhouse |
|---|---|---|
| Request initiation | Email or spreadsheet to vendor; duplicate data entry | Single request from Greenhouse candidate profile |
| Candidate follow-up | Recruiter makes repeated manual calls and emails | Automated reminders and status tracking |
| Report retrieval | Vendor sends files; recruiter uploads to ATS | Structured report attached to candidate timeline automatically |
| Global coverage | Multiple vendors or limited coverage | Single vendor with 190-country reach |
Typical turnaround windows by region (indicative)
| Region | Common range | Notes |
|---|---|---|
| North America | 1–5 business days | Identity and criminal checks often fast; reference responses depend on referees |
| EMEA | 2–10 business days | EU countries vary by local process and data access permissions |
| APAC | 3–15 business days | Some jurisdictions require manual public-record searches, lengthening timelines |
| South America | 5–20 business days | Availability and digitization levels vary by country |
Compliance and identity assurance: Zinc’s certification under the UK IDVT Trust Framework means its identity-verification processes meet recognized standards for proofing and evidence handling. For employers this matters where legal or regulatory obligations require demonstrable identity verification steps. When implementing the integration, confirm local data-protection rules (for example, lawful basis for processing and data retention policies) and use consent workflows to document candidate permission for checks. Zinc provides privacy policy references and country-specific guidance to support compliance.
Setup checklist: practical steps to implement Zinc with Greenhouse. Start by confirming account and API access with both platforms and designate an implementation owner. Map the required candidate fields in Greenhouse to the Zinc request payload and test with a pilot group of candidates in one region before broad rollout. Also configure user permissions in Greenhouse to restrict report access, establish SLA expectations with hiring managers, and create a simple standard operating procedure (SOP) for recruiters to know which checks to request at which stage.
Best practices and common pitfalls
- Pilot by region Start with one country or region to validate workflows and turnaround expectations before global expansion.
- Clarify check types Define which roles need identity only, identity + criminal, or additional reference checks to avoid unnecessary requests.
- Manage expectations Communicate realistic timelines to hiring managers—not every jurisdiction will return results in 24 hours.
- Protect sensitive data Limit who can view full reports and ensure retention policies align with local regulations.
Measuring ROI: data points to track after deployment. Track average time-to-complete checks per region, recruiter hours saved per check, percentage of hires with completed checks before start date, and any compliance incidents avoided. Comparing baseline manual processing hours to automated hours gives a clear estimate of time and cost savings. Also measure hiring funnel velocity—if time-to-hire shortens and offer acceptance rates remain stable or improve, that indicates the integration is reducing friction without harming candidate experience.
Zinc feature matrix (selection)
| Feature | Why it matters |
|---|---|
| 190-country coverage | Use a single provider across jurisdictions to reduce vendor management overhead |
| Automated follow-ups | Increases response rates from referees and candidates, reducing manual chasing |
| IDVT-compliant identity checks | Supports regulated use cases where verified identity evidence is required |
| Greenhouse API integration | Keeps all screening activity and reports centralized within the ATS |
Common questions about integrating Zinc with Greenhouse
Q: Will candidate consent be captured automatically?
A: Zinc supports consent workflows; you should configure Greenhouse candidate communications to include required consent language and document the candidate’s permission before initiating checks.
Q: Does the integration store full reports in Greenhouse?
A: Yes—Zinc returns structured reports which are attached to the candidate record in Greenhouse for review and audit trails, subject to your ATS storage and access policies.
Q: How do turnaround times vary?
A: Turnaround depends on country digitization, public-record access, and referee responsiveness. Use the regional timing table in this article as an indicative guide and collect baseline metrics during your pilot.
Q: What support is available for implementation?
A: Zinc provides developer documentation and support; Greenhouse also offers integration guides. Assign an internal implementation lead to coordinate API keys, field mappings, and test plans.
Example workflows across hiring stages: For high-volume hiring, configure checks to trigger automatically after an offer is accepted—this minimizes workflow steps during sourcing and interviewing. For risk-sensitive roles, trigger identity and criminal checks at the offer stage and start references earlier so both can complete in parallel. Document each workflow in your SOP and align hiring managers on the point of check initiation to avoid last-minute surprises that delay start dates.
Troubleshooting and escalation: Common issues include missing candidate data, mismatched identity documents, and slow referee responses. Maintain a short troubleshooting guide for recruiters: verify candidate data completeness, re-request missing information via Zinc’s candidate portal, and escalate unclear identity matches to Zinc support with case IDs. Establish an internal SLA for escalations (for example, 24–48 hours to open a support case) and keep stakeholders informed of any delays that affect start dates.
Speed up hiring and improve screening accuracy with ZYTHR
Pair Zinc’s global background checks in Greenhouse with ZYTHR’s AI resume-screening to save recruiter hours and reduce mis-hire risk. ZYTHR automates resume review, surfaces the best matches, and integrates with ATS workflows so your team focuses on validated, high-fit candidates—shortening time-to-hire and improving review accuracy.