Senior Authentication Services Engineer

3M•Austin, TX

3d•$145,676 - $178,049•Onsite

About The Position

The Senior Authentication Services Engineer is a skilled technical contributor within the Identity & Access Management organization. This role is responsible for the engineering, implementation, and operational support of enterprise authentication platforms across a complex global environment. Working closely with the Principal Engineer and IAM leadership, you will deliver authentication capabilities, maintain platform health, and contribute to the evolution of authentication services aligned with the broader Zero Trust security strategy. This is a hands-on engineering role with growing technical ownership. You will implement authentication solutions, support integrations across the application portfolio, and contribute to standards and documentation that serve the broader IAM program.

Requirements

High School Diploma (verified and completed prior to start) and 8 years of experience in Information Technology, Computer Science, IAM Engineering, or Information Security in a private, public, government, or military environment.
OR Bachelor's degree or higher (verified and completed prior to start) and Six (6) years of experience in Information Technology, Computer Science, IAM Engineering, or Information Security, in a private, public, government, or military environment.
Must be legally authorized to work in country of employment without sponsorship for employment visa status (e.g., H1B status).

Nice To Haves

Microsoft Entra ID: Strong hands-on experience including Conditional Access, PIM, application registrations, and hybrid identity (Entra Connect)
Active Directory: Solid working knowledge of domain architecture, Group Policy, trusts, Kerberos, NTLM, and AD security hardening
MFA: Experience implementing enterprise MFA solutions including phishing-resistant methods (FIDO2, WHfB)
Federation protocols: Working proficiency with SAML 2.0, OIDC, and OAuth 2.0
SSO: Experience supporting integrations across enterprise SaaS and on-premises application portfolios
Automation: Working knowledge of PowerShell scripting and Microsoft Graph API for identity operations
Familiarity with identity security tooling (e.g., Microsoft Defender for Identity, Entra ID Protection, SIEM integrations)
Windows Hello for Business: Exposure to WHfB deployment planning or FIDO2/YubiKey rollouts
PAM platforms: Familiarity with CyberArk or comparable PAM tools and their intersection with authentication services
Exposure to IGA platforms and lifecycle event integration with authentication systems
Cloud Identity: Experience with AWS IAM, Azure AD B2B/B2C, or multi-cloud identity federation
Certifications: SC-300, AZ-500, or equivalent Microsoft identity certifications (preferred, not required)
Experience working in large enterprise environments with complex hybrid identity architectures

Responsibilities

Engineer, configure, and maintain Microsoft Entra ID, Active Directory, and federated identity services across the enterprise
Implement and support SSO integrations (SAML, OIDC, OAuth 2.0) across SaaS, on-prem, and hybrid application portfolios
Configure and manage MFA policies, authentication method settings, and phishing-resistant credential rollouts (FIDO2, Windows Hello for Business, certificate-based auth)
Develop, test, and maintain Conditional Access policies in alignment with security requirements
Contribute to authentication standards, patterns, and reference architectures under guidance from the Principal Engineer
Participate in proof-of-concept efforts for emerging authentication technologies
Maintain and update technical documentation including runbooks, configuration records, and architecture diagrams
Support alignment of authentication controls with Zero Trust principles and enterprise security policies
Provide technical evidence, control narratives, and remediation support for audit and compliance activities
Identify and remediate gaps in authentication posture through engineering solutions
Monitor authentication platform health and respond to security incidents within the authentication domain
Support incident response and troubleshoot complex authentication issues as a technical escalation resource
Collaborate with application teams, infrastructure engineering, and security operations to deliver IAM solutions
Contribute to knowledge transfer, documentation, and team skill development
Participate in on-call rotation for authentication platform support
Corporate policies, procedures and security standards are complied with while performing assigned duties.
Contribute to a strong Environmental Health and Safety (EHS) culture by following safety policies, identifying hazards, and engaging in continuous improvement.