The wise man would rather see men needing him than thanking him... hope has a good memory, gratitude a bad one. More is to be got from dependence than from courtesy.
Baltasar Gracián, 1647 (tr. Joseph Jacobs, 1892)
Thanks is a receipt for the past; need is a contract with the future. Careers are protected not by the favours people remember but by the problems only you can solve. The professional whose skills are pleasant but replaceable collects warm farewells. The one who owns a capability the system depends on collects postings, extensions, and second chances. Build the dependence on your competence, openly and legitimately: be the person whose absence is expensive. What you must never do is manufacture need by hoarding knowledge or keeping others helpless. That version works too, and it corrodes everything it touches, including you.
Practice
- Own at least one capability your unit would visibly miss within a week: a system, a relationship, a skill.
- Refresh the need: yesterday's indispensability expires. Move toward the problems that are becoming important.
- Document generously and train your successor anyway. Real experts stay needed at the next level up; hoarders stay stuck guarding the cupboard.
Use this when
- Use this when planning your skills: choose what the organisation will need, not only what it currently applauds.
- Use it in negotiations; leverage belongs to the party harder to replace.
Ignore this when
- Don't cross the line into engineering helplessness: withheld passwords, private processes, juniors kept dim. That is the corrupt version, and it shows.
- Don't build your whole worth on being needed at office. Institutions forget everyone eventually; keep an identity they cannot retire.
A picture of it
In an IT services firm, one engineer truly understands the legacy billing system nobody wants to touch. He documents it, trains two juniors anyway, and moves to the new migration, where he again becomes the person who understands what others avoid. Three restructurings pass over him like weather. Not because he is loved, though he is liked well enough, but because his absence has a price, and everyone who matters knows the number.
Thanks is paid at the exit. Need is paid every month. Know which one your salary actually is.