Principal System Engineering

This position requires office presence of a minimum of 5 days per week and is only located in the location(s) posted. No relocation is offered.

Join AT&T and help shape the future of communications and technology that connect the world. We value innovators who seek to explore the unknown and challenge the status quo. Bring your bold ideas and fearless spirit to redefine connectivity and transform how people share stories and experiences. At AT&T, you won’t just imagine the future—you’ll build it.

Are you an experienced Microsoft Exchange Engineer with a passion for designing, implementing, and managing robust email solutions? Are you ready to manage a hybrid Exchange environment that hosts 200k e-mail accounts and the e-mail traffic that comes with it? 

The Enterprise Technology Services team is seeking a highly skilled professional to join our team. The ideal candidate will have extensive knowledge of and experience with e-mail and how it works end-to-end.  This role will primarily focus on administering Microsoft Exchange in both cloud and on-premises environments.  The role involves strategic planning, architecture design, and hands-on implementation of our email infrastructure.

What you’ll do:
• System Design and Architecture: Design and create scalable, high-performance, and reliable system architectures and platforms.
• Requirements Analysis and Integration: Translate business needs into technical specifications and ensure seamless integration of system components.
• Technical Leadership and Collaboration: Provide guidance to development teams, align technical solutions with business objectives, and collaborate with stakeholders.
• Performance, Reliability, and Troubleshooting: Conduct performance and reliability analysis, and resolve system issues and bottlenecks.
• Documentation, Security, and Continuous Improvement: Maintain detailed system documentation, ensure security and compliance, and stay updated with industry trends for ongoing improvement.

What you’ll need:

• Design, build and maintain AT&T Hybrid Exchange environment

• Oversee day to day administration of Exchange environments, both on-premises and online

• Work with peer organizations in AT&T to ensure our Exchange environment integrates seamlessly with existing IT infrastructure including Active Directory, Office 365 and other cloud solutions

• Work with developers across AT&T to ensure e-mail standards are met as it pertains to sending and receiving emails

• Design, build and maintain PowerShell scripts for account migrations and health checks

• Work with team to implement and manage disaster recovery and a high availability Exchange environment

• Partner with peers on the SMTP Relay side of the business to ensure seamless delivery of emails across AT&T

• Ensure that new security standards such as TLS 1.3, anti-spam, data loss protection (DLP) are being met across the Exchange environment

• Provide 3rd line support for internal help desk tickets

• Develop and maintain detailed documentation of Exchange architecture, configurations, and procedures

• Weeklong on-call responsibilities for issues and troubleshooting up to multiple times a year.  Includes holidays.

Design applications, platforms or services by translating core business requirements into comprehensive technical solutions, ensuring functional, performance, and reliability through hands-on system design, technical enablement, and strategic decision-making across platform, network, software, and cloud environments.

What you’ll bring:

• 8-10 years of experience in a large Hybrid Exchange environment

• Extensive experience in designing, implementing, and managing Microsoft -Exchange Server (2016/2019) and Exchange Online

• Experience with PowerShell scripting for automation and management tasks.

• Experience with web development, c#, MS Graph

• Proficient in Microsoft 365 and hybrid cloud solutions

• Strong knowledge of Active Directory, DNS, and related infrastructure components

• Familiarity with security practices and compliance requirements (e.g., GDPR, HIPAA)

• Excellent problem-solving skills and the ability to work under pressure

• Strong communication skills, both written and verbal

• Relevant certifications such as MCSE: Productivity, Microsoft 365 Certified: -Messaging Administrator Associate, or equivalent are highly desirable

An expert in their field, applying broad business knowledge and strategic insight surrounding emerging trends and technologies to solve complex probl