talk
to us

New York
250 Park Avenue,
14th Floor New York City, NY 10177

Connecticut
22 Thorndal Circle,
3rd Floor Darien, CT 06820

Paris
23 rue du Mail
75002 Paris – France

info@beperpetual.com

Perpetual: Reads | The Birkman Method

Our series of book recommendations to empower talent and fuel brands.

The Birkman Method

Why Perpetual recommends it

The Birkman Method, written by Sharon Birkman Fink and Stephanie Capparell, is the origin story and user manual for one of the assessment tools we rely on most in our talent and executive search work. Roger Birkman, a WWII fighter pilot turned psychologist, built the assessment after noticing that people’s usual behaviour and their needs under stress could be almost completely different — and that most personality tools of his era only captured the former.

The book explains the logic behind that dual-lens approach: your effective, everyday behaviour, and the underlying needs that, if unmet, quietly derail that behaviour into stress reactions. It’s a more forgiving and more accurate model than a lot of personality typing, because it doesn’t put people in a box; it explains why a strength in one context becomes a liability in another when a specific need goes unmet.

We use the Birkman Method directly with clients, so this book is less a discovery for us and more a chance to go back to first principles on why the tool works the way it does. Understanding the needs behind the behaviour is often the single most useful insight we can give an executive team about each other.

The book recounts how Birkman first tested his ideas on airline pilots, noticing that the calm, steady behaviour pilots displayed in the cockpit masked very different underlying needs for structure or autonomy — needs that, if frustrated on the ground, showed up as friction with crews and ground staff. That same pattern, competent surface behaviour built on unmet needs, is what we most often uncover when we run Birkman profiles with executive teams today.

  • Everyday behaviour and underlying needs can look completely different in the same person
  • Stress behaviour is usually a signal that a specific underlying need isn’t being met
  • Strengths and derailers are two sides of the same trait, not separate issues
  • Understanding needs, not just style, is what makes an assessment actionable for teams

For teams, the practical value comes from sharing needs, not just styles, openly — when people understand that a colleague’s need for structure or recognition is real and legitimate, friction that used to read as a personality clash often resolves on its own.

We give this book four out of five stars.

See more insights

Perpetual: Reads | The Long-Distance Leader

Our series of book recommendations to empower talent and fuel brands. Why Perpetual recommends it Kevin Eikenberry and Wayne Turmel’s The Long-Distance Leader argues that the fundamentals of good leadership don’t change when a team goes remote, what changes is...

Perpetual: Reads | How Leaders Can Inspire Accountability

Our series of book recommendations to empower talent and fuel brands. Why Perpetual recommends it Michael Timms’ How Leaders Can Inspire Accountability makes a case that most organisations think about accountability backwards: they focus on holding other people accountable, when...

Perpetual: Reads | Leading from Anywhere

Our series of book recommendations to empower talent and fuel brands. Why Perpetual recommends it David Burkus’ Leading from Anywhere is a practical playbook for managing remote and hybrid teams well, covering the full arc from onboarding and one-on-ones to...

Perpetual: Reads | Extreme Ownership

Our series of book recommendations to empower talent and fuel brands. Why Perpetual recommends it Extreme Ownership, by former Navy SEAL officers Jocko Willink and Leif Babin, takes leadership principles forged in combat and translates them, chapter by chapter, into...