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Enterprise SSO in your ATS: what it is and why recruiting needs it
Enterprise SSO (Single Sign-On) lets your team access the ATS with the company's corporate identity credentials — Okta, Microsoft Entra ID, Google Workspace — instead of separate usernames and passwords. In a system that stores candidate personal data, this stops being a convenience and becomes a security requirement. This guide explains how SAML and SCIM work and what to ask your recruiting software vendor.
Key Takeaway
Orphaned accounts — access that stays active after someone leaves the company — are one of the most common causes of data breaches. Enterprise SSO with SCIM eliminates them automatically, without relying on someone remembering to deactivate the user.
The problem enterprise SSO solves
Without SSO, every person on the recruiting team has their own username and password for the ATS. That creates three problems:
- Weak or reused passwords, which open the door to unauthorized access.
- Orphaned accounts: when a recruiter leaves the company, their ATS access stays active until someone deactivates it manually.
- Slow onboarding: each new hire requires creating a user, sending credentials and configuring permissions by hand.
The ATS is one of the most sensitive systems a company runs: it holds resumes, contact data, evaluations and sometimes salary information for hundreds or thousands of people. Treating its access with less rigor than corporate email is a governance mistake.
SAML: authentication
SAML (Security Assertion Markup Language) is the protocol that handles authentication. When a recruiter logs into the ATS, instead of asking for a separate password, the ATS redirects to the corporate identity provider (Okta, Entra ID, Google Workspace). The provider confirms the identity — applying company policies, including MFA — and returns a signed assertion telling the ATS "this person is who they claim to be."
The result: a single corporate credential, governed by central security policies, with no separate passwords to manage.
SCIM: provisioning
SCIM (System for Cross-domain Identity Management) is the protocol that handles provisioning: it automates the user account lifecycle.
| Event | Without SCIM | With SCIM |
|---|---|---|
| New recruiter joins | Manual account creation in the ATS | Account created automatically |
| Role or team change | Manual permission edits | Permissions synced automatically |
| Person leaves the company | Manual deactivation (if someone remembers) | Access revoked automatically |
SCIM connects the corporate directory to the ATS, so any change in the directory — onboarding, role change, offboarding — is reflected in the ATS without manual work.
SAML + SCIM: together, not separately
SAML answers "who is logging in?". SCIM answers "who should have an account, and with what permissions?". A serious enterprise ATS offers both:
What to ask your ATS vendor
- Enterprise SSO via SAML 2.0, compatible with Okta, Microsoft Entra ID and Google Workspace.
- SCIM 2.0 provisioning for automatic user onboarding and offboarding.
- MFA inherited from the identity provider's policies.
- Role-based access controls (RBAC) to limit what each user sees once inside.
- SOC 2 Type II and GDPR compliance as a security baseline.
- A public Trust Center documenting these guarantees.
How Selenios solves it
Selenios offers enterprise SSO via SAML, SCIM provisioning, role-based access controls and SOC 2 Type II certification, with a public Trust Center. Your team's ATS access is governed by the same security policies as the rest of your corporate stack — and orphaned accounts stop being a risk.