This document summarizes a workshop on developing researcher careers in Europe. It discusses establishing structured, sustainable, and lifelong career development services for researchers. Better training researchers in transferable skills could improve academia and intersectoral mobility. Stakeholders discussed the state of research career development and recommendations. They agreed development is still in early stages and focused on early careers. Recommendations included developing a roadmap, framework, and encouraging funding and participation from the European Commission, member states, research organizations, and EURAXESS. The overall goal is improving research careers and evaluation systems across Europe.