The traditional career ladder — climb one organization in one field — is giving way to the portfolio career, where professionals combine multiple roles, income streams, and projects. This article examines why portfolio careers are growing (technology enabling independent work, desire for autonomy, risk diversification) and how to build one intentionally. It covers the portfolio career framework: anchor roles for stability, passion projects for fulfillment, skill-building experiments, and legacy work. Practical guidance includes financial planning, time allocation, personal branding, and navigating the social pressure to have 'one answer' to 'what do you do?'