Ajaz Ahmed Siddiqui

About Ajaz Ahmed Siddiqui

I’m a Security Consultant and Service Engineering Manager with 15+ years of experience in…

Experience

1. Senior Security Engineer

   T-Mobile

   Sep 2025 — Present

   As a senior member of the Identity Security and Access Management team, I lead initiatives around Identity Security and Access Management to strengthen enterprise identity posture and ensure adherence to regulatory frameworks including PCNI, USGCI, and SOX. Key Responsibilities:• Architect and implement end-to-end Identity and Access Management (IAM) solutions across non-production and production environments, embedding security and compliance throughout the development lifecycle.• Integrate enterprise applications with Entra ID using SAML, OIDC, OAuth, and App Proxy, while implementing entitlement management via Access Packages to ensure secure and compliant access.• Implement secure SSO solutions and centralized authentication policies, including custom claim and role design for SaaS and internal applications.• Define and deploy authentication and access configurations in collaboration with Engineering and Application teams, aligning with enterprise security and compliance objectives.• Automate user provisioning and lifecycle management using SCIM, PowerShell Scripting, and Microsoft Graph, enforcing least-privilege access principles.• Streamline periodic user access reviews for application owners to validate permissions granted through Access Packages and Security Groups.• Monitor IAM operations and performance using Azure Monitor, proactively identifying improvement opportunities and optimizing authentication flows.• Drive continuous improvements in onboarding, access governance, and identity lifecycle automation to enhance security and user experience.

Education

• Punjab Technical University

  Master of Science (M.S.), Information Technology

  2011 — 2013

• Delhi University

  Bachelor of Science (B.Sc.), Computer Science

  2007 — 2010