Allyson Stewart‑Allen, Founder & CEO at International Marketing Partners
In this episode of Leaders with Ambition, host Nicky Acuña Ocaña is joined by Allyson Stewart‑Allen, Founder and CEO of International Marketing Partners, for a wide‑ranging and deeply insightful conversation on international careers, professional services leadership, and the realities of global growth.
A globally recognised authority on the internationalisation of professional services firms, Allyson brings decades of experience advising leaders across legal, consulting, accounting, and advisory businesses. Originally from Los Angeles and now based in London, Allyson shares how early exposure to international life — including growing up in Munich and studying languages — shaped her worldview and ultimately her career.
Allyson reflects on her professional journey from PwC, PA Consulting Group, and Hay Group to founding her own consultancy in the early 1990s. She speaks candidly about recognising early on that traditional corporate environments weren’t where she did her best work — and the courage it took to build something of her own.
The conversation explores Allyson’s bestselling book, Working with Americans, written in response to years of being asked the same cross‑cultural questions by global leaders. Allyson explains how the book came to life, why cross‑cultural understanding is still widely misunderstood, and how global firms continue to underestimate the complexity of international expansion.
Nicky and Allyson also unpack the real differences between mentoring, sponsorship, and executive coaching, drawing on Allyson’s experience as both a mentee and mentor. Allyson shares why mentorship has been particularly influential in her career - and why sponsorship is often the missing ingredient for progression in professional services.
The episode also dives into the biggest challenges facing leaders in professional services today, including global‑versus‑local tensions, leadership transitions from technical expert to firm leader, and the growing importance of culture, people leadership, and adaptability. Allyson offers thoughtful, practical insight from her work with senior partners, CMOs, and leadership teams across international firms.
This episode is essential listening for professionals navigating international careers, leadership transitions, and growth within professional services environments.
What You’ll Learn in This Episode
Building an international career early
How Allyson’s childhood in Europe and early language learning shaped her career — and why early global exposure matters.
From corporate to founder
Why Allyson chose to leave large global consultancies to build her own firm — and what that transition was really like.
Looking at the world through a global lens
Why international expansion is never “copy and paste” — and the cultural pitfalls firms still underestimate.
Writing Working with Americans
How repeated client questions evolved into a bestselling book — and why understanding American business culture remains critical.
Mentoring vs coaching vs sponsorship
The real differences between each — and when professionals should seek them out.
The importance of sponsors
Why advocacy matters more than advice alone, particularly in complex organisations.
Networking without the stigma
Why networking doesn’t mean “working the room” — and how authentic relationships create long‑term opportunity.
Leadership beyond technical excellence
Why being great at your profession doesn’t automatically translate to being a great leader — and how firms can close the gap.
Global vs local decision‑making
One of the hardest challenges for international firms — and why there’s no one‑size‑fits‑all solution.
Taking calculated risks
Why saying yes — even before you feel ready — can be career‑defining.
Key Takeaways
International careers are shaped early
Early exposure to different cultures, languages, and ways of working builds the foundation for long‑term global success.
Global growth isn’t copy and paste
Successful international expansion requires cultural intelligence, local nuance, and intentional adaptation — not replication.
Mentorship, sponsorship, and coaching play different roles
Mentorship offers perspective, sponsorship creates opportunity, and coaching helps individuals find their own answers — all are valuable at different stages.
Sponsorship accelerates progression
Advocates inside organisations are often the difference between potential and real opportunity.
Leadership requires new muscles
Technical excellence doesn’t automatically translate into leadership capability — running a practice demands a different skill set.
Culture determines strategy’s success
Strong cultures enable alignment, engagement, and execution — without them, even the best strategy fails.
Networking is about relationships, not transactions
Authentic connection and curiosity drive long‑term opportunity more than formal “networking.”
Calculated risk changes trajectories
Saying yes before feeling fully ready is often where growth and career‑defining moments begin.
Key Quotes
“If you don’t try it, you’ll never know what it could have been.”
“Mentoring is about shared experience — coaching is about finding your own answers.”
“Culture really does eat strategy for breakfast.”
“People want you to succeed — more than you realise.”
“Internationalisation is never about copying what worked somewhere else.”
About Allyson Stewart‑Allen
Allyson Stewart‑Allen is Founder and CEO of International Marketing Partners and a globally recognised authority on the international growth of professional services firms.
She advises leadership teams across law, consulting, accounting, property, financial services and other advisory firms on their global expansions, culture, leadership development and international integration. Allyson is also a Principal Consultant with PSFI, a frequent broadcaster for BBC News, DW News, France 24, FT, Sky News and author of the bestselling book Working with Americans. (use Ambition discount code WWA25OFF).
Based in London, Allyson has spent over 30 years helping leaders and their organisations navigate the complexities of operating across borders.
About Nicky Acuña Ocaña
With over 25 years of experience leading high‑performing recruitment teams, Nicky Acuña Ocaña is President – Americas, UK & Europe at Ambition.
She oversees specialist recruitment teams supporting professional services firms, with a focus on Legal Marketing & Business Development in the US and Business Services roles across the UK & Europe.
A passionate advocate for Allyship, Belonging & Inclusion (ABI), Nicky is a sought‑after speaker on leadership, hiring trends, retention, and inclusive workplace cultures.
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