Principal Portfolio Manager

Job Overview

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!

Ideal candidate will be in Bellevue, WA however we will consider Overland Park, KS

This role leads end-to-end portfolio management for a broad product portfolio, ensuring alignment with business objectives, delivery transparency, and value realization. The Principal Portfolio Manager drives cross-functional governance processes, partners with senior leaders to elevate risks and inform prioritization decisions, and produces data-driven reporting and portfolio visualizations that support strategic planning. Success is defined by portfolio health, stakeholder alignment, and measurable delivery outcomes across business and technical teams.

• Own end-to-end product portfolio management, ensuring alignment with business objectives and delivery of measurable value
• Translate complex delivery, financial, and risks into clear, compelling presentations tailored for executive audiences; this candidate must be able to hold a room with the senior leadership team independently
• Lead portfolio governance processes including intake, prioritization, resource allocation, funding decisions, and business case evaluation
• Partner with program and project managers to track delivery status, surface resource and schedule risks, and drive escalation paths
• Facilitate regular portfolio reviews with senior leaders and cross-functional stakeholders to support decision-making and communicate delivery health
• Build and maintain portfolio reporting, dashboards, and visualizations (using tools such as Power BI, Tableau, Planview, or Smartsheet) to communicate key insights and portfolio performance
• Drive alignment across business and technical teams in a matrixed environment by maintaining clear communication cadences and documentation standards
• Also responsible for other duties/projects as assigned by business management as needed

• Bachelor's Degree and 7 years of related work experience, OR a combination of education and experience deemed equivalent (Required)
• Acceptable areas of study:
  Business, Marketing, Computer Science, or related field (Preferred)
• 7–10 years of experience managing portfolios, assessing performance, and delivering against financial and resource constraints (Required)
• 7–10 years of experience managing cross-functional programs and projects with senior stakeholder engagement in a matrixed environment (Required)
• 7–10 years of experience in the full project/program lifecycle, including intake, planning, execution, and reporting (Preferred)
• Experience leading or mentoring project teams across multiple business and technical disciplines (Preferred)

• Portfolio Management — including intake governance, prioritization frameworks, and performance tracking (Required)
• Project/Program Management — cross-functional, multi-stakeholder, senior executive visibility (Required)
• Budget Management — OPEX/CAPEX tracking, resource forecasting, financial constraint management (Required)
• Strategic Planning — OKRs, roadmap alignment, portfolio-level prioritization (Required)
• Executive Communication — ability to synthesize portfolio status and risks for VP and above (Required)
• Data Analysis and Reporting — portfolio dashboards, visualizations, and KPI tracking (Required)
• Collaboration / Stakeholder Management — matrixed environment, cross-functional teams (Required)
• Agile and/or Waterfall Delivery Methodologies (Preferred)
• Familiarity with PPM tools such as Planview, Smartsheet, Jira, or Service Now (Preferred)
• Design Thinking (Preferred)

• Project Management Professional (PMP) (Preferred)
• SAFe Agilist, PgMP, or equivalent portfolio/program certification (Preferred)

• At least 18 years of age
• Legall…