Senior Vendor Manager - Roaming and Wholesale

• Manage strategic vendor relationships supporting roaming and wholesale products and solutions
• Act as the primary point of contact for vendor performance, quarterly business reviews, escalations, issue resolution, and service improvement initiatives
• Build and maintain strong relationships with vendors to align expectations, improve delivery reliability, and support long-term business goals
• Ensure vendor contracts remain aligned with technology evolution, business priorities, and the latest GSMA and wireless industry standards
• Drive accountability across both T-Mobile and vendor teams for implementation, service levels, deliverables, and compliance with contractual terms
• Partner with internal stakeholders across Commercial, Analytics, Network, Finance, Accounting, Operations, Engineering, and IT to gather, clarify, and prioritize business needs
• Translate business needs into clear requirements and work with vendors or internal delivery teams to ensure solutions are developed, tested, and delivered accurately and on time
• Resolve conflicting requirements, manage tradeoff decisions, and ensure alignment between business priorities and vendor capabilities
• Oversee end-to-end lifecycle management for vendor-supported roaming and wholesale products and operational solutions, from intake through delivery and ongoing support
• Produce and maintain clear business documentation, including BRDs, operational requirements, user stories, acceptance criteria, and vendor deliverables where applicable
• Maintain a current understanding of GSMA standards and wireless industry trends in Retail and IoT Roaming, and assess their impact on vendor strategy, contracts, and service roadmap
• Collaborate with vendors and internal partners to assess emerging opportunities, risks, and required changes to product or service capabilities
• Support P&L and budget goals by identifying opportunities for cost savings, service quality improvement, and operational efficiency
• Partner with leadership to support back-office budget planning for projects, vendor investments, and service improvements
• Ensure enterprise processes are followed to secure and maintain funding for vendor-supported initiatives and help remove blockers impacting delivery
• Participate in Big Room / Program Increment planning and other major Agile planning sessions and governance forums as needed to align vendor delivery with business priorities
• Coordinate communication and activities across internal teams and vendors to ensure consistent execution and transparency
• Manage vendor resource performance and delivery accountability, where applicable
• Work collaboratively with Product, RTEs, Scrum Masters, Engineering, IT, and Operations teams to support successful solution delivery and operational readiness
• Take on other duties and special projects as assigned by business leadership

• Bachelor's Degree plus 3 years of related work experience OR advanced degree with 1 year of related work experience OR combination of education and experience deemed equivalent
• 2-4 years of Product Management or Vendor management experience in telecommunications, roaming, enterprise platforms, or highly technical product environments
• Proven record building and launching complex, platform-based products integrating across network, BSS/OSS, and partner ecosystems
• Experience leading 0→1 product development and/or large-scale product transformations preferred
• Deep understanding of wireless networks, roaming platforms, and/or billing and customer management platforms (BSS/OSS)
• Proven success delivering large, complex initiatives across multiple teams and systems
• Ability to identify and develop new revenue opportunities, including value-added services and product packaging strategies
• Proven ability to communicate complex technical and business concepts clearly to stakeholders at all levels, including executive leadership
• Strong ability to analyze and synthesize data to drive product decisions and measure impact
• Demonstrated ability to translate customer and partner needs into scalable product solutions
• At least 18 years of age
• Legally authorized to work in the United States

Experience leading 0→1 product development and/or large-scale product transformations

• Competitive base salary and compensation package
• Annual stock grant
• Employee stock purchase plan
• 401(k)
• Access to free, year-round money coaches
• Medical, dental and vision insurance
• Flexible spending account
• Paid time off and up to 12 paid holidays
• Paid parental and family leave
• Family building benefits
• Back-up care
• Enhanced family support
• Childcare subsidy
• Tuition assistance
• College coaching
• Short- and long-term disability
• Voluntary AD&D coverage
• Voluntary accident coverage
• Voluntary life insurance
• Voluntary disability insurance
• Voluntary long-term care insurance
• Mobile service & home internet discounts
• Pet insurance
• Access to commuter and transit programs