Dr Sarah Theissen

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About me

If you're a high-achieving woman with ADHD who is holding it all together, but quietly running on empty - you're in the right place.

I'm Sarah, an NTA-certified ADHD Coach and counsellor in training. I work exclusively with ambitious, late-diagnosed women who are performing well in their careers, but are exhausted by how much effort it takes. Women who are capable, driven, and increasingly aware that the way they're working isn't sustainable.

I know this because I was one of them.

I spent over two decades in fast-paced academic and corporate leadership roles. On paper, my career looked successful. In reality, I relied on urgency to focus, over-prepared to feel safe, and carried work in my head long after the day ended. My own ADHD diagnosis came in my mid-40s, following burnout - and it changed everything. Not just how I understood myself, but how I understood what genuine success should feel like.

That experience is the foundation of everything I do.

I provide a 16-week 1:1 coaching programme called The ADHD Recalibration that consists of four structured phases. Together, we go beyond generic productivity advice to build something personal, practical, and genuinely lasting. We start by understanding how your brain actually works - mapping your strengths, identifying your energy drains, and building a foundation of self-awareness that underpins everything we do together. Next, we build bespoke systems, routines and boundaries designed around your brain - not someone else's. Then we tackle the patterns that make it hard for you to switch off, manage rejection sensitivity, and trust yourself again. And we finish by making sure it all holds under real-life pressure.

This isn't about fixing you. It's about finally working with your brain instead of against it.

I coach through a rare combination of scientific knowledge, corporate leadership experience, and lived experience, underpinned by ICF-accredited ADHD coaching training.

If you're ready to stop relying on urgency and start building ways of working that are actually sustainable, then book a free discovery call with me by clicking the button at the top of this page.

Training, qualifications & experience

Qualifications & Certifications

  • Certified ADHD Coach (Neurodiversity Training Academy)
  • Burnout Coaching - ongoing (Balanceology)
  • Certified ADHD Practitioner (Neurodiversity Training Academy)
  • Mental Health First Aider (MHFA England)
  • Level 3 Certificate in Counselling Studies - ongoing (CPCAB via CPTA)
  • Level 2 Certificate in Counselling Skills (CPCAB via CPTA)
  • PhD in Molecular Biology (Royal College of Surgeons in Ireland)
  • BSc (Hons) in Applied Biosciences (Cork Institute of Technology)

Professional Experience

  • 10+ years in corporate leadership roles in fast-paced, high-pressure environments
  • 10+ years in academic research

Lived Experience

  • Received ADHD diagnosis in mid-40s following burnout
  • Personal experience of late diagnosis, masking, urgency-driven working patterns, and rebuilding sustainable systems

Areas of coaching I deal with

My specialisms

ADHD
ADHD specific coaching training and lived experience.
Burnout
Burnout specific coaching training.
Leadership
Years of experience working in demanding leadership roles.

All areas

Other areas of coaching I deal with

  • Executive Functioning

Photos & videos

Fees

£100.00 - £125.00
Free initial online session

Additional information

My coaching is offered as a complete programme rather than individual sessions. This structured, phased approach is deliberate in order to create lasting change that holds long after the programme ends.

The ADHD Recalibration - from £899 

A 16-week 1:1 coaching programme including:

  • 1 x 90-minute deep dive session
  • 6 x 50-minute fortnightly coaching sessions
  • 1 x 90-minute implementation session
  • Optional weekly body doubling sessions
  • Between session support & accountability check-ins
  • Workbooks
  • Bespoke toolkit of wellbeing and breathwork techniques

Payment plans are available on request. To find out more, please book a free, no-obligation clarity call by clicking the "Book a session" button at the top of the page.

When I work

Mon Tue Wed Thu Fri Sat Sun
Early morning
Morning
Early afternoon
Late afternoon
Evening

I'm quite flexible, so if you don't see an availability that suits you, please email me or book a free clarity call by clicking the "Book a session" button at the top of the page.

London, Greater London, N11

Type of session

In person
Online

Types of client

Adults (25-64)
Older Adults (65+)

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