A chief operating officer once described her working life to me as running a very effective machine with one part missing. She could hold a room, absorb a complex operating picture in minutes, and make good decisions under pressure. She also could not reliably file an expense report, and had lost two hours that morning to a task she had been avoiding for a week. She had assumed for thirty years that this was a character flaw she had failed to correct.
She was forty-nine when she was assessed for attention-deficit/hyperactivity disorder, which is not unusual in this population. Late diagnosis in accomplished adults is common, and the reason is instructive: the compensations work, sometimes for an entire career.
Why It Gets Missed
The stereotype of ADHD is a restless boy who cannot sit through a lesson. That presentation is real and it is not what walks into an executive coaching engagement.
High-achieving adults with ADHD have typically spent decades constructing an environment that neutralizes the impairment, usually without recognizing that this is what they were doing. The elements are recognizable across many of the leaders I have assessed:
- Cognitive horsepower. Sufficient intelligence can substitute for organization for a long time. Work done at the last moment is still good work, and nobody sees the cost of producing it that way.
- Hyperfocus on the engaging. ADHD is better described as dysregulated attention than absent attention. When the material is genuinely interesting or urgent, attention can be extraordinary. Executives frequently choose work that supplies constant novelty and stakes, which is an environment their attentional system happens to run well in.
- Administrative scaffolding. An executive assistant is, functionally, an external executive-function system. Calendar, follow-up, prioritization, and reminders all move outside the person's own head. Many leaders do not discover they were relying on this until it is removed.
- Crisis as a stimulant. Urgency produces the arousal that ordinary tasks do not. This is why some leaders unconsciously arrange their working lives around deadlines and emergencies, and why they perform genuinely well in acute situations.
All of this works. It also carries a cost that shows up as chronic low-grade shame about the private gap between how capable the person appears and how disordered their internal experience feels.
Where the Scaffolding Fails
The compensation tends to break at a predictable transition: the move from doing the work to overseeing it.
An individual contributor or functional leader is largely responding to external structure. Deadlines are given, problems arrive, and the attentional system is pulled along by them. A senior executive role removes that structure. Nobody assigns the chief executive their priorities. The work becomes self-directed, largely unstimulating in its administrative components, and dependent on the sustained self-organization that is precisely the affected capacity.
The result is a leader who was outstanding at the level below and is now, inexplicably to them, struggling. They read this as inadequacy for the larger role. It is frequently the removal of the environmental supports that had been doing the work all along. This is one of the more common hidden dynamics I encounter in leadership transition coaching, and it is almost never on the transition checklist.
The Adult Presentation
Visible hyperactivity generally recedes with age, leaving a picture that looks less like restlessness and more like inconsistency.
Initiation, not attention
The defining daily difficulty for most adults is not concentrating. It is starting. A task that is important, straightforward, and unstimulating can sit for weeks while genuinely harder work gets done. Executives describe this with real bewilderment, because the effort required to avoid the task plainly exceeds the effort the task would require.
Inconsistency as the signature
Attention is not uniformly poor. It is unreliable, and the unreliability is what distinguishes it. Six hours of unbroken focus on an interesting problem followed by an inability to read a two-page memo is a more characteristic pattern than uniform distractibility.
Working memory
Walking into a room and losing the reason. Reading a paragraph three times. Losing the thread mid-sentence while speaking. These are frequently misattributed to stress or age, and in executives over forty they usually are attributed to exactly that.
Emotional reactivity
Less widely recognized and often the most disruptive feature at senior levels. Emotional responses arrive quickly and at higher intensity than the situation warrants, then resolve quickly. Leaders describe a short fuse they dislike in themselves and cannot seem to lengthen.
Time perception
Chronic underestimation of how long things take, difficulty perceiving intervals accurately, and a resulting pattern of over-commitment that is read by others as unreliability and by the person themselves as failure.
Diagnosis Requires Care
Two errors are common in this territory, and both are costly.
The first is dismissal. A leader who raises the possibility is often told they cannot have ADHD because they run a company. Achievement does not exclude the diagnosis. It usually means the compensation was good.
The second is over-diagnosis. Several conditions common in executives produce overlapping presentations. Chronic sleep deprivation degrades attention and working memory substantially. Anxiety disorders fragment concentration. Depression impairs initiation and produces exactly the difficulty starting tasks described above. Untreated sleep apnea, common in this demographic and frequently missed, mimics the entire picture. Alcohol use affects all of it.
A proper assessment requires evidence of onset in childhood, symptoms present across multiple settings rather than only at work, genuine functional impairment, and a considered exclusion of the alternatives. School reports, recollections from a parent or long-standing partner, and an honest developmental history matter more than any questionnaire. This is diagnostic work rather than coaching work, and the distinction is one I hold carefully.
What Changes
For leaders who are accurately diagnosed, several things tend to shift.
The narrative reorganizes. This is frequently the most significant single effect. Thirty years of private evidence about laziness or unreliability gets reinterpreted as a describable and treatable condition. Executives often describe an unfamiliar relief, and the reduction in ambient shame is itself performance-relevant.
Structures get built deliberately. Once the mechanism is understood, the compensations can be designed rather than improvised. Externalizing memory entirely rather than partially. Building genuine deadline structure into self-directed work. Batching the unstimulating administrative work into defined, bounded periods. Placing the right kind of support around the specific gap. This is ordinary performance optimization work, made far more effective by an accurate model of what is being optimized.
Treatment is on the table. Medication for adult ADHD is well studied and, for many people, substantially effective. It is a medical decision requiring a physician, ongoing monitoring, and honest attention to cardiovascular and sleep considerations. It is not a coaching decision, and any practitioner who treats it as one is operating outside their scope.
A Word on Framing
I am wary of both prevailing narratives here. ADHD is not a superpower, and describing it that way trivializes real impairment in people whose lives it has genuinely constrained. Nor is it a deficiency in an otherwise capable person. It is a difference in how the attentional and regulatory systems operate, which produces real disadvantages in some environments and real advantages in others.
Senior leadership is, curiously, an environment where several of the associated traits perform well: tolerance for rapid context switching, energy under pressure, comfort with the unstructured, and the capacity for sustained focus when the problem is genuinely interesting. Many of the leaders I have worked with reached their positions partly because of these traits.
What they needed was not to be fixed. They needed an accurate account of how their own system works, and the structures that let it run well. If the description here is familiar, an assessment is a reasonable next step, and you can start that conversation here.