Leadership depth separates a senior IC who is excellent at their own work from a senior practitioner whose work multiplies through other people. It is the discipline that takes most designers from year eight to year fifteen and beyond, and the one most often mistaken for “getting promoted” rather than treated as a craft of its own.
The choice that defines this vertical is people leadership or thought leadership, two shapes of the same capacity. Both produce influence on work the practitioner does not personally do, through different mechanisms.
People leadership, the management track, is influence mediated through direct working relationships. The people leader hires designers, sets standards, runs critiques, manages performance, builds team culture, and makes resourcing decisions, shaping how the team’s work converges into a coherent practice. The output is a team that produces work the leader could not produce alone: responsibility for the conditions under which other practitioners do their best work. The five domains of design management are developed in Chapter 12.
Thought leadership, the senior IC track, is influence mediated through artefacts, ideas, and demonstrated practice rather than direct management. The thought leader writes, speaks, defines methods, builds tools the broader practice adopts, and mentors without managing, shaping how the discipline thinks about itself. The output is a practice reshaped in ways that outlast the projects they personally shipped. Senior IC roles (Staff, Principal, Distinguished, Advisor) are its organisational expression. Writing, conference work, open-source contributions, and named methodologies are its broader-discipline expression.
Leadership depth is genuinely a vertical, depth rather than experience. Many design organisations assume leadership emerges automatically from seniority, that a designer who has been senior long enough is ready to lead a team or define a practice. In fact it is a developable craft that some experienced practitioners have built and others have not, regardless of years. The senior designer promoted into management without developing the craft of management is doing the same kind of work as a junior giving their first stakeholder presentation: enacting a role they have not yet learned.
7.4 — Vertical 2, Leadership people or thought · H3