Principal System Engineer
Mesa, Arizona
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.
At AT&T, we empower leaders to drive change in a fast-evolving, connected world. Your strategic vision will help serve customers and transform lives through innovative solutions and impactful connections.
As a Principal System Engineer, you'll lead the identification and tactics to eliminate customer effort and will play a pivotal role in reinventing Business customer interactions, simplifying Care operations, and enabling AI‑powered capabilities across our Business Care & Sales ecosystem. The Principal System Engineer will drive end‑to‑end process analysis, workflow design, and technology solutioning across Business Care & Sales operations including Billing & Collections, and next‑generation contact center platforms. This individual will blend Lean/Six Sigma process engineering, enterprise systems design, and AI workflow innovation to reduce customer effort, accelerate resolution, and streamline operations.
What you’ll do
Typical tasks may include, but are not limited to, the following:
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
Bachelor’s degree (BS/BA) desired in Computer Science.
7+ years of related experience.
Certification is required in some areas.
What you’ll bring
An expert in their field, applying broad business knowledge and strategic insight surrounding emerging trends and technologies to solve complex problems and drive organizational results.
Leads critical, high-impact projects and designs/implements innovative business strategies.
Works with minimal oversight, frequently consulting senior leadership and influencing executive decisions.
Serves as a mentor and assists others with challenging issues.
Supervisor: No
TCP Career Step Differentiator:
Designs systems and platforms for very large complex projects for strategic clients and that have multiple system interdependencies.
Must have a strong understanding of computers (hardware and OS), network, and software architecture.
Our Principal System Engineer earns between $174,100 - $261,100. Not to mention all the other amazing rewards that working at AT&T offers. Individual starting salary within this range may depend on geography, experience, expertise, and education/training.
Joining our team comes with amazing perks and benefits
Medical/Dental/Vision coverage
401(k) plan
Tuition reimbursement program
Paid Time Off and Holidays (based on date of hire, at least 23 days of vacation each year and 9 company-designated holidays)
Paid Parental Leave
Paid Caregiver Leave
Additional sick leave beyond what state and local law require may be available but is unprotected
Adoption Reimbursement
Disability Benefits (short term and long term)
Life and Accidental Death Insurance
Supplemental benefit programs: 8critical illness/accident hospital indemnity/group legal
Employee Assistance Programs (EAP)
Extensive employee wellness programs
Employee discounts up to 50% off on eligible AT&T mobility plans and accessories,
AT&T internet (and fiber where available) and AT&T phone
If you’re ready to make an impact on our business and your career, bring your bold ideas to a world of possibility.
Apply today!
Weekly Hours:
40Time Type:
RegularLocation:
Cerritos, California, Dallas, Texas, Greensboro, North Carolina, Mesa, Arizona, Miami, Florida, Nashville, Tennessee, Southfield, Michigan, Tulsa, OklahomaSalary Range:
$155,400.00 - $261,100.00It is the policy of AT&T to provide equal employment opportunity (EEO) to all persons regardless of age, color, national origin, citizenship status, physical or mental disability, race, religion, creed, gender, sex, sexual orientation, gender identity and/or expression, genetic information, marital status, status with regard to public assistance, veteran status, or any other characteristic protected by federal, state or local law. In addition, AT&T will provide reasonable accommodations for qualified individuals with disabilities. AT&T is a fair chance employer and does not initiate a background check until an offer is made.
Job ID R-100740-3 Date posted 02/17/2026
Benefits
Your needs? Met. Your wants? Considered. Take a look at our comprehensive benefits.
- Paid Time Off
- Tuition Assistance
- Medical and dental plans
- Discounts
- Training & Development
Our hiring process
Apply Now
Confirm your qualifications align with the job requirements and submit your application.
Assessments
You may be required to complete one or more assessments, depending on the role.
Interview
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Conditional Job Offer
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Background Check
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