What aspects of David’s experience suggest that he is following a protean or boundaryless career?

To answer this question, we first need to understand what a protean or boundaryless career is.

1. Protean Career: This is a career that is driven by the individual and not by the organization. The person with a protean career is values-driven in the sense that the individual's personal values provide the guidance and measure of success for the career.

2. Boundaryless Career: This is a career that is not defined or bounded by the borders of a single organization. Instead, it moves across the boundaries of multiple organizations.

Now, to determine if David is following a protean or boundaryless career, we need to look at certain aspects of his experience:

1. Autonomy and Self-Direction: If David is making career decisions based on his personal values and goals rather than organizational goals, it suggests a protean career.

2. Mobility: If David has worked in different organizations or industries, or has changed roles frequently, it suggests a boundaryless career.

3. Skill Development: If David is focused on continuously learning and developing new skills that are transferable across different roles or industries, it suggests both a protean and boundaryless career.

4. Networking: If David has a broad network of professional contacts across different organizations or industries, it suggests a boundaryless career.

Without specific details about David's experience, it's hard to definitively say whether he is following a protean or boundaryless career. However, these are the aspects you would look at to make that determination.