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# Career development

> How to track employee promotions, retention, and career progression over time using the Merge HRIS API.

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#### Authentication and connection

Use Merge Link to authorize an HRIS integration in a seamless end user experience.

#### Complete an initial employee import

[**GET** /employees](https://docs.merge.dev/hris/employees/#employees_list), [/employment](https://docs.merge.dev/hris/employments/#employments_list), and [/groups](https://docs.merge.dev/hris/groups/#groups_list) to pull the roster of current employees and their managers, locations, departments, and job titles.

> **Note**
>
> Use Scopes to limit what employee fields are being synced.

#### Track employee changes over time

Use webhooks or the Merge API to track changes to an employee over time.

#### Display insights to customers

Using Merge data, generate insights to employee retention, churn, and promotion.

#### (Optional) Survey terminated employees

If authorized, reach out to offboarded employees with a survey about their employment experience.

* [Field Mappings](/merge-unified/supplemental-data/field-mapping/overview)

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