Most firms optimise for technical excellence, experience, and sometimes, polish. They look for the people who can cope with the workload, build relationships and sound plausible when asked about strategy.

It feels rigorous. It looks professional. It also quietly reproduces the same leadership profile—over and over again.

And that has two consequences.

First, it’s often a diversity killer. When selection leans heavily on subjective notions like “gravitas”, “confidence”, “fit”, or “presence”, you don’t just reward capability—you reward similarity to the people already at the top. Many firms are sincere about broadening leadership representation, but their selection mechanics are still built around legacy signals that advantage the already-advantaged.

Second, it is increasingly future-blind. It selects people who thrive in stable systems… at exactly the moment the world is changing. And for those in Professional Services it is changing beyond compare.

Here’s the uncomfortable truth …… the most important trait in tomorrow’s leaders isn’t technical mastery or even commercial sophistication.

It’s adaptability under uncertainty.

Not “likes change”. Not “says the right things about AI”.

The ability to keep delivering while the rules keep moving:

• new tools, new workflows, new expectations
• shifting client scope and service models
• new regulation and risk exposure
• teams distributed across offices, and
• a profession being reshaped in real time

Many firms say they want this. Very few assess it properly.

Why our current recruitment habits are failing

Traditional hiring and promotion processes tend to focus on three things:

1. Retrospective proof
Where have you worked? Which clients? Which matters? Which projects?
Useful, but it can become a proxy for brand and opportunity rather than capability.

2. Performance in a single moment
The “good interview” candidate. The confident presenter. The person with a ready-made narrative.
Again: useful, but it is a poor predictor of how someone performs when conditions change. How many times have your said “They are not working out… yet they did so well in the interview!”

3. Unexamined similarity
“We just liked them.”
“They’d fit.”
“They remind me of…”
This is where both future-readiness and diversity often quietly, die. When selection criteria are fuzzy, bias fills the gaps.

If you want leaders who can navigate what’s coming, you need to measure for what the future demands—not what the past rewarded.

The new leadership differentiator: Adaptability (with discipline)

Adaptability isn’t enthusiasm. It’s capability.

It has observable behaviours:

• Learning agility: speed to competence in new tools, systems, and ways of working
• Judgement under ambiguity: making good decisions when requirements are unclear
• Risk and quality control: using AI and automation without letting standards collapse
• Influence without authority: securing buy-in when time is tight and priorities conflict
• Capacity creation: knowing what to stop, simplify, or redesign so change is actually possible

This is why some people who look brilliant on paper, struggle as leaders when the context changes. They were selected for competence in the old operating model, not the new one.

So how do you assess adaptability properly?

You won’t get it from a “chatty” interview.

The strongest approach is triangulation across three elements:

1. A validated occupational personality measure (Big Five-based)
This helps you understand traits linked to learning orientation and comfort with uncertainty, without relying on gut feel. It should never be the sole decision-maker, but it can strengthen consistency and reduce bias.

2. A role-specific Situational Judgement Test (SJT)
This is where you test adaptability in your reality:

• What do they do when scope changes the day before a deadline?
• How do they adopt new software when training time is scarce?
• How do they use AI responsibly—checking, documenting, escalating—rather than treating it as magic?
• How do they handle conflict between speed and quality?

3. A structured interview aligned to the same capabilities
Not “tell me about yourself.”
But targeted evidence: prioritisation under pressure, influencing stakeholders, learning fast, and delivering while the ground shifts.

This is the difference between selecting “people who interview well” and selecting “people who lead well.”

Recruitment is only half the story: promotions are where this really shows up

Even firms that recruit well can sabotage themselves at promotion points. Promotion often becomes:

• a test of confidence, not competence
• a test of politics, not leadership
• a test of familiarity, not future-readiness

If you want a credible leadership pipeline, the promotion process must measure the same capabilities you say you value – especially adaptability.

That’s where we do a lot of our work.

We help firms design and roll out promotion and progression processes that are transparent, fair, and aligned to future leadership demands. That includes:

• designing and facilitating partner development programmes that build strategic influence and execution discipline

• supporting partner panel interviews so decisions are evidence-based and consistent

• creating business plan templates and promotion submissions that force clarity: strategy, commercial outcomes, leadership behaviours, and delivery plans

• embedding the language of “skills, systems, and culture” into what candidates are expected to demonstrate

The goal is simple: reduce guesswork, reduce bias, and build a pipeline of leaders who can thrive as the profession changes.

The provocation

If your leadership model still rewards stability-era behaviours, you will keep promoting the wrong people for the next era.

And you will keep wondering why your change programmes stall, why AI adoption becomes patchy, why “strategy” doesn’t translate into action, and why diversity progress is slow.

Adaptability is the new “technical”.

The question is: are you assessing it, systematically, in recruitment and promotion? Or are you still relying on gut feel and “fit”?

If you want to compare notes on what this looks like in practice (and what good assessment and promotion architecture actually looks like), get in touch kate@thegrogroup.com and we will be happy to share our experience and save you time and money.