Senior Authentication Services Engineer

Job Description:

Senior Authentication Services Engineer Collaborate with Innovative 3

Mers Around the World Choosing where to start and grow your career has a major impact on your professional and personal life, so it’s equally important you know that the company that you choose to work at, and its leaders, will support and guide you. With a wide variety of people, global locations, technologies and products, 3M is a place where you can collaborate with other curious, creative 3

Mers.

This position provides an opportunity to transition from other private, public, government or military experience to a 3M career. The Impact You’ll Make in this Role 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.

Here, you will make an impact by:

Authentication Platform Engineering Engineer, configure, and maintain Microsoft Entra , 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 credentialrollouts (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

Security & Compliance 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

Collaboration & Operational Excellence 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

Your Skills and Expertise  To set you up for success in this role from day one, 3M requires (at a minimum) the following qualifications:

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.

Additional qualifications that could help you succeed even further in this role include:

Microsoft Entra g 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 hardeningMFA:
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 Power Shell scripting and Microsoft Graph API for identity…