I'm curious to learn more about how different organizations structure their strategic portfolio management teams. What does your team look like in terms of roles, responsibilities, and overall structure? Are there any unique approaches or best practices that have proven successful for your organization?

I can provide you with some general insights into common roles, responsibilities, and structures based on established practices up to that point. Keep in mind that organizational structures can vary widely, and trends may have evolved since then.

Common Roles in Strategic Portfolio Management Teams:

Portfolio Manager/Director:

Responsible for overseeing the entire portfolio, aligning it with organizational goals.
Ensures strategic alignment and monitors the health of the portfolio.

Portfolio Analyst:

Analyzes data related to projects and programs within the portfolio.
Assists in decision-making by providing insights into project performance.

Project Managers/Program Managers:

Responsible for the execution of individual projects or programs within the portfolio.
Ensure that projects align with strategic objectives and deliver desired outcomes.

The structure of strategic portfolio management teams can vary significantly across organizations based on size, industry, organizational culture, and specific strategic objectives. 

I personally work within an organisation with matrix structure.
This structure combines elements of both, centralised and decentrilise approaches. Based on their roles and responsibilities, my team members report to me and each look after their own business units, for example, data automation, PPC, analytics, SEO. 
Outside our core set up, there are standalone projects they are part of. In this case they might report to an additional central PMO or unit head, who is responsible for overall project success.

In my opinion, Matrix structure is very complex, however is ideal for removing silos. It allows non relating departments to cooperate and develop project related hierarchies.

Inform rapid high quality decsions. Adapt to meet changing needs, Provide governance necessary to respond to new and changing oppurtunities.

Effective strategic portfolio management teams commonly include roles such as portfolio managers, analysts, and coordinators. Responsibilities involve aligning projects with organizational goals, optimizing resource allocation, and ensuring strategic objectives are met. Best practices often include regular reviews, prioritization based on business value, and leveraging technology tools for efficient management.

the specific structure and practices can vary based on the nature of the organization, industry, and the types of projects being managed. It's essential to tailor the approach to fit the unique needs and circumstances of your organization.