Tax Technology Manager

T-Mobile US Inc.; Frisco (TX); On-site; USD 120,000 - 170,000; Full time

Job summary

T-Mobile in Frisco, Texas seeks a Manager, Indirect Tax Technology to lead configuration and administration of Vertex O Series and related tax products across Oracle Fusion and Amdocs platforms. You will drive end-to-end project delivery, tax impact assessments, requirements, UAT, and post-production validation.

The role focuses on platform stability, knowledge continuity, and scalable tax technology transformation within the TOAST team, enabling efficient tax decisions for the business.

Qualifications

• Bachelor's degree in Computer Science, Engineering or related field plus 5 years' related work experience.
• Advanced degree with 3 years' related experience acceptable.
• Experience with indirect tax (sales/use, CST) and tax technology systems.
• Hands-on with tax determination engines (Vertex O Series preferred).
• Experience with Oracle Fusion ERP or Amdocs billing platforms in a tax technology context.
• Proficiency in SQL; cloud data environments preferred.

Responsibilities

• Support configuration and maintenance of Vertex O Series and Communications Tax products, including imposition ID analysis, jurisdiction management, and transaction-level tax decision validation across Oracle Fusion and Amdocs billing platform integrations.
• Deliver enterprise project lifecycle activities including tax impact assessment, business requirements documentation, UAT coordination, and post-production validation for small to medium initiatives.
• Document Vertex configurations, integration decision history, and project lifecycle processes to build durable institutional knowledge; contribute to TOAST transformation roadmap execution and organizational resiliency planning.
• Also responsible for other duties/projects as assigned by business management as needed.

Skills

Indirect Tax Domain Knowledge

Vertex O Series

Tax Engine Troubleshooting

Business Requirements Analysis

Project Management

Stakeholder Management

SQL

Education

Bachelor's Degree in Computer Science, Engineering or related field

Advanced degree in related field

Tools

Vertex O Series

Avalara/Amdocs

Oracle Fusion ERP

Amdocs Billing Platforms

SQL databases

Job description

At T-Mobile, we invest in YOU! Our Total Rewards Package ensures that employees get the same big love we give our customers. All team members receive a competitive base salary and compensation package - this is Total Rewards. Employees enjoy multiple wealth-building opportunities through our annual stock grant, employee stock purchase plan, 401(k), and access to free, year-round money coaches. That’s how we’re UNSTOPPABLE for our employees!

The Manager, Indirect Tax Technology serves as a core contributor to the Tax Operations & Solutions Team (TOAST), T-Mobile's Indirect Tax technology and operations function. The role supports configuration and administration of Vertex O Series and Communications Tax products integrated with Oracle Fusion and Amdocs billing platforms. It drives end-to-end enterprise project lifecycle delivery — from tax impact assessment and business requirements through UAT and post-production validation. The role also provides analytical support enabling tax decision validation, troubleshooting, root cause analysis, anomaly detection, and enterprise operational support. Success is measured by platform stability, project delivery quality, knowledge continuity, and the team's ability to scale through T-Mobile's ongoing tax technology transformation.

Job Responsibilities

• Support configuration and maintenance of Vertex O Series and Communications Tax products, including imposition ID analysis, jurisdiction management, and transaction-level tax decision validation across Oracle Fusion and Amdocs billing platform integrations.
• Deliver enterprise project lifecycle activities including tax impact assessment, business requirements documentation, UAT coordination, and post-production validation for small to medium initiatives.
• Document Vertex configurations, integration decision history, and project lifecycle processes to build durable institutional knowledge; contribute to TOAST transformation roadmap execution and organizational resiliency planning.
• Also responsible for other duties/projects as assigned by business management as needed.

Education

• Bachelor's Degree plus 5 years of related work experience OR Advanced degree with 3 years of related experience (Required)
• Acceptable areas of study include Computer Science, Engineering or a related field. (Required)

Work Experience

• 5-8 years Experience in indirect tax (sales and use tax, gross receipts, communications services tax) with hands-on work in tax technology systems. (Required)
• 5-8 years Hands-on experience with a tax determination engine (Vertex O Series strongly preferred; Avalara or similar considered), including configuration, administration, and transaction-level troubleshooting (Required)
• 3-5 years Active participation in enterprise project delivery including business requirements, UAT, and post-production validation in a cross-functional environment. (Required)
• 3-5 years Proficiency in SQL and experience working in cloud data environments (Snowflake, Databricks, or equivalent). (Preferred)
• Experience with Oracle Fusion ERP or Amdocs billing platforms in a tax technology context. (Preferred)
• Background in Big 4 indirect tax technology consulting or a multi-platform enterprise tax technology role. (Preferred)
• Experience supporting M&A indirect tax due diligence or system integration projects. (Preferred)
• Experience in a formal leadership or team coordination role. (Preferred)

Knowledge, Skills and Abilities

• Indirect Tax Domain Knowledge (Sales/Use, Gross Receipts, CST, 911/988, USF) (Required)
• Vertex O Series — Configuration and Administration (Preferred)
• Tax Engine Troubleshooting and Transaction-Level Analysis (Preferred)
• Business Requirements Analysis (Required)
• Project Management (Required)
• Stakeholder Management (Required)