Permissions: Job Admin or higher

Product tier: Available to all subscription tiers

'Data Science' is an often used umbrella term that, in reality, spans several different data and analytics competencies. To help organizations evaluate these skills, Correlation One developed the first standardized assessment platform exclusively for Data Science & Analytics (DSA) talent.

The C1 Assessment Platform consists of 1,000+ questions across dozens of data-oriented topics, including statistics, machine learning, SQL, hypothesis testing, experiment design, data wrangling & cleaning, qualitative data inference, and many more. The C1 Assessment Platform has been administered to over 50,000 DSA individuals around the world, and has been used to assess fit for a variety of analytical roles, from entry-level data analyst to product manager to data scientist to machine learning researcher. Correlation One works with you to develop custom tests that fit your specific DSA talent needs.

The Greenhouse Recruiting and Correlation One integration helps you seamlessly use the two platforms together to add Correlation One assessments to your Greenhouse Recruiting interview pipeline.

In this article, we will cover:

Enable the Greenhouse Recruiting / Correlation One integration

To enable the integration, contact Correlation One to request your API key. Once you have received your API key, fill out the form at or click here to open a ticket with Greenhouse Support.

Note: Please do not send your API key in the initial email to Greenhouse Support. Greenhouse Support will provide a secure link for you to safely share your API key.

Greenhouse Support will respond with a SendSafely link for you to share your API key. A notification will be sent to Greenhouse Support after you have entered your API key, and they will email you to confirm that your API key has been set up in your account and your integration is enabled.

Note: To verify your identity, Greenhouse Support may request you provide a Support Verification Code before adding the API key to your organization's account.

Add the Correlation One assessment stage to a job

After you've confirmed the API key has been setup by Greenhouse Support, you can add the Correlation One assessment stage to your job's interview plan.

From the All Jobs tab in Greenhouse Recruiting, select a specific job.


Click the Job Setup tab.


Click Interview Plan on the left.


From the Interview Plan page, click Add Stage.


Select Correlation One, and click the Add button.


The Correlation One assessment stage has been added to your job. Repeat for any other jobs, or consider performing a bulk action to add the stage to multiple jobs at once if needed.

Configure the Correlation One assessment stage

Once the Correlation One stage has been added to a job, hover over the stage to select Edit Icon_-_Edit.png.


On the Edit page, you'll see a drop-down menu that reflects the assessments that you’ve previously set up in Correlation One.

Select the appropriate assessment, and assign at least one Greenhouse Recruiting user to grade / review the submitted assessment.

Click Save.

Note: All configuration of the Correlation One assessment itself, including the email template, will need to be completed in Correlation One.

Send a Correlation One assessment to a candidate

When candidates are moved into the Correlation One interview stage, Greenhouse Recruiting will display a Send Test button on the candidate profile. Correlation_One___Send_test.png

Note: When you click Send Test on Greenhouse Recruiting, the interview instructions are actually sent by Correlation One.

Once an assessment is sent with the Correlation One integration, the status of the assessment will be viewable in Greenhouse Recruiting.

Viewing the test results

Once a candidate has submitted their test, the candidate's interview kit in Greenhouse Recruiting will contain a link to view the submitted test on Correlation One.

Select View Report to be taken to Correlation One to view the results.

After reviewing the results, return to Greenhouse Recruiting to submit your scorecard (if applicable).Screen_Shot_2018-11-27_at_11.08.04_PM.pngScreen_Shot_2018-11-27_at_11.18.24_PM.png