Why US Companies Need Independent Advisory for European M&A Integrations

by Serge Jonnaert

Private equity firms and strategic acquirers are increasingly targeting European assets, drawn by favorable valuations, strong sector-specific synergies, and the risk of loss of market access as a result of looming tariff wars. Several significant M&A deals involving European companies in the technology, healthcare, finance, and energy sectors, have been announced or are in progress in 2025. Notable transactions include SES acquisition of Intelsat, Synopsys’ acquisition of ANSYS, Blackstone takeover of Warehouse, Hims & Hers’ acquisition of Zava, Franklin Templeton’s acquisition of Apera Asset Management, to name a few. Major firms like Blackstone, KKR, Apollo, and Carlyle are also expanding their European acquisition activities, committing record capital. European PE deal value surged 78% in 2024 to reach €342B, while Q1 2025 showed a 45% increase in deal volume, setting the stage for continued aggressive US expansion into European markets.

While the financial metrics and strategic rationale behind cross-border acquisitions may appear compelling on paper, the reality beneath these promising deals reveals an intricate landscape of operational hurdles, cultural divides, and geopolitical complexities that routinely sabotage even the most meticulously planned transactions. Cross-border acquisitions face fundamentally steeper odds than domestic deals, with failure rates consistently higher across all sectors and geographies. The distance—both physical and cultural—between acquirer and target creates exponential complexity that traditional due diligence processes often fail to capture.

The Big Five Consulting Trap

Many acquiring companies default to engaging prestigious Big Five consulting firms, who despite their global reach and reputation, frequently deploy cookie-cutter methodologies that treat European acquisitions as merely scaled versions of domestic deals. The consulting teams assigned to these engagements are often populated by junior associates—talented but inexperienced professionals who lack the nuanced understanding of European business ecosystems that successful integration demands.

The cultural competency gap becomes particularly acute when these young consultants attempt to navigate the subtle but significant differences in business practices, regulatory environments, and stakeholder expectations that define European markets. What works in Chicago or Dallas may not translate to Munich or Milan, yet the templated approach persists.

The Heritage Fallacy

Larger corporations often deploy dedicated integration teams, some members of which tout their “European heritage” as cultural credentials. However, this represents a fundamental misunderstanding of contemporary European business culture. Third or fourth-generation Irish or German Americans possess no inherent advantage in comprehending the complexities of modern European commerce over their colleagues. Today’s Europe operates within a sophisticated framework of EU regulations, cross-border trade relationships, and cultural sensitivities that bear little resemblance to the ancestral memories of American executives. The assumption that ethnic heritage translates to business acumen reflects a dated perspective that can actually hinder successful integration by creating false confidence in cultural understanding.

The Double-Edged American Approach

The distinctively American “can-do” attitude—characterized by optimism, urgency, and results-oriented thinking—undeniably possesses a magnetic quality that can energize European teams and drive rapid decision-making. It is what attracted me to immigrating to the US 30 years ago. This unique mindset continues to prove transformative, but can become a liability when applied without sensitivity to European business norms. The American preference for quick decisions may clash with European consensus-building traditions. The emphasis on individual accountability may conflict with collaborative decision-making structures. The focus on short-term results may undermine the long-term relationship-building that European business culture values.

Successful cross-border acquisitions require a more sophisticated approach that requires investing in deep cultural intelligence, engaging authentic expertise, and developing integration strategies that respect rather than override existing business practices. The most successful acquirers recognize that European market entry is not about imposing American business culture, but rather about creating a hybrid approach that combines the best of both worlds while respecting the complex realities of contemporary European commerce.

Leading M&A integrations between US acquirers and European operations demands a sophisticated blend of leadership capabilities that go far beyond traditional management skills. It requires a thorough needs assessment for each engagement, the ability to navigate complex cultural dynamics while driving operational transformation in an increasingly technology and AI-consumed business landscape. It takes a team with many years of trial-and-error experience, and a solid track record of successes.

Cross-Cultural Leadership

Effective integration leaders master the art of bridging distinctly different leadership philosophies. American business culture typically emphasizes direct communication, quick decision-making, and individual accountability, while European approaches often prioritize consensus-building, thorough consultation, and collective responsibility. Leaders need cultural intelligence that allows them to adapt their communication style, decision-making processes, and team dynamics to honor both traditions while creating a unified path forward. This includes understanding how authority is perceived differently across cultures – where American directness might be seen as aggressive in Germany or the Netherlands, while European deliberation might be viewed as indecisiveness by US stakeholders.

Knowledge of Countries and Unique Business Cultures

European markets represent a tapestry of distinct business environments, each with unique regulatory frameworks, employee rights traditions, and commercial practices. A leader integrating operations in France must navigate strict labor laws and strong union relationships, while someone working in the UK post-Brexit faces different regulatory considerations than those in EU member states. Understanding that Italian business relationships are often built on personal trust and long-term partnerships, while Scandinavian cultures emphasize egalitarian decision-making and work-life balance, is crucial for successful integration. This knowledge extends to practical considerations like holiday schedules, meeting protocols, and even the role of formal titles and hierarchies in daily operations.

Adding to the dynamics, Europe has witnessed unprecedented workforce mobility, with EU expansion, the Schengen Agreement, and digital connectivity enabling millions of professionals to cross borders for career opportunities. This mobility has created a fascinating paradox: while European business environments have become more internationally staffed, national business cultures have proven remarkably resilient and, in some cases, have become more assertive in projecting their models across the continent.

The Need for a Chief Enthusiasm Officer

Integration periods create uncertainty that can paralyze organizations. Employees fear job losses, cultural changes, and career disruption. You need master communicators who can articulate a compelling vision while addressing legitimate concerns. Effective integration requires genuine conviction about the merger’s strategic value, communicated with credible passion. This balanced transparency builds trust when employees are naturally skeptical.

Integration leaders excel at identifying and celebrating small victories—successful cross-cultural collaborations, process improvements, client wins. These modest celebrations maintain forward momentum and demonstrate tangible merger benefits. Equally important is recognizing cultural contributions from both organizations, highlighting unique strengths rather than positioning one culture as superior.

Effective leaders understand the value of fun, humor, and shared experiences. Creating opportunities for informal connection—team gatherings, lighthearted activities, moments of shared laughter—builds the personal relationships that become the foundation for professional collaborations that can last a lifetime. These “goofy” moments serve a serious strategic purpose in integration success. Over the years I organized many memorable team events throughout the US, Europe, and Asia, including an ‘Amazing Race’ in the old city center of Malaga and even a team week at one of Britain’s ‘Most Haunted’ castles…

Agility in a Rapidly Changing World Impacted by AI

Today’s integration leaders must simultaneously manage traditional M&A challenges while navigating unprecedented technological disruption. AI is transforming everything from customer service operations to supply chain management, creating both opportunities for integration synergies and risks of technological obsolescence. Leaders need to assess how AI capabilities in both organizations can be combined or optimized, while also preparing teams for future technological changes. This agility extends to regulatory environments, particularly in Europe where AI governance frameworks are evolving rapidly. The most effective leaders view AI not just as a cost-cutting tool but as a strategic enabler that can help newly integrated operations compete more effectively in global markets.

The intersection of these skills creates particularly complex challenges. For instance, implementing AI-driven operational improvements while maintaining the collaborative decision-making culture valued in many European organizations requires careful navigation. Similarly, driving enthusiasm for lean operations while respecting European employee consultation requirements demands sophisticated change management capabilities.

Successful M&A integration leaders in this environment are essentially cultural translators, operational optimizers, and technological visionaries rolled into one. They must possess the emotional intelligence to build trust across cultures, the analytical skills to identify and capture synergies, and the strategic foresight to position the integrated organization for future success in an AI-transformed business landscape.

The Reality of Persistent National Business Cultures

Despite increased mobility, distinct national business approaches remain deeply embedded, and certain countries have become particularly assertive in promoting their business models as European standards.

German companies still emphasize their methodical, consensus-driven decision-making processes and long-term planning horizons, even when operating across Europe. Germany’s “Mittelstand” model of family-owned, export-oriented medium-sized enterprises is frequently cited as a template for European competitiveness.

French businesses continue to prioritize intellectual rigor and formal hierarchy in their organizational structures. France leverages its historical role in European integration to promote its state-guided capitalism model, particularly in strategic industries. French approaches to industrial policy and the role of elite educational institutions in business leadership continue to influence EU-wide discussions on competitiveness and innovation policy.

Nordic countries maintain their flat organizational models and work-life balance philosophies. Sweden’s approach to innovation ecosystems and work-life balance has become a benchmark that other European countries study and attempt to replicate. They have also successfully exported their stakeholder capitalism model, influencing European discussions on corporate social responsibility and sustainable business practices.

These cultural frameworks persist because they’re rooted in centuries of traditions, educational systems, and social values that don’t disappear simply because the workforce becomes more international.

Why Mobility Hasn’t Erased Cultural Distinctions

The mobile European workforce often reinforces rather than dilutes cultural differences. International executives frequently become cultural ambassadors for their home country’s business practices. A Dutch executive working in Spain might introduce more direct communication styles and flatter hierarchies, while a Spanish executive in the Netherlands might emphasize relationship-building and personal connections in business dealings.

Moreover, regulatory and institutional frameworks remain nationally determined in many crucial areas. Corporate law, taxation, labor relations, and banking regulations still vary significantly across Europe, creating structural incentives for companies to maintain distinct national approaches even as their workforce becomes more international.

Building Long Term, Sustainable Success

The most successful European acquisitions are those that approach integration as a partnership rather than a takeover. This requires a win-win mentality that values European market knowledge while bringing American strategic vision, capital resources, and growth ambition to bear. This is precisely why US companies pursuing European acquisitions need more than internal teams and just investment bankers. They need independent advisors who combine deep M&A expertise with hands-on international operational and marketing experience—professionals who can serve as cultural translators, operational architects, and strategic cheerleaders throughout the integration journey, and position it for sustainable, long-term success.

Don’t let cultural misalignment sabotage your European acquisition. Partner with advisors who’ve walked this path and built the bridges to sustainable, long-term success.

How THE.MERGER.COMPANY® can assist. With decades of experience driving successful outcomes for companies navigating complex deals, we bring both carefully planned execution and creativity to your M&A journey—ensuring you not only meet but exceed your strategic objectives. We have a team of talented professionals with years of experience integrating transatlantic M&A acquisitions, covering all operational functions. If you need assistance with European acquisitions, contact us here.


Serge Jonnaert is a seasoned CEO and M&A Advisor with a proven track record in driving global partnerships, consortium initiatives, government collaborations, and successful M&A deals. Born in Belgium and fluent in four languages, he has held executive leadership positions in technology and healthcare companies across Europe, Canada, and the United States for over 38 years. Throughout his career, he has demonstrated expertise in managing complex international M&A integrations, spinouts, and divestitures.