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About Us

Michael and Florian

Michael Monheim and Florian Hartmann

Founding Partners

Who We Are

We founded AtlanticNexus Partners to support and empower European businesses in establishing a strong and sustainable foothold in the U.S. As trusted, hands-on partners, we guide companies through every stage of their market entry journey.

Backed by decades of entrepreneurial and executive experience, we’re committed to accelerating time-to-market, minimizing risk, and delivering tailored strategies to navigate the complexities of the U.S. business landscape.

Florian Hartmann & Michael Monheim

Founding Partners

Our mission is to unite European excellence with American opportunity and ingenuity, ensuring a strong foundation for sustainable growth and success.

Meet the Founders

Throughout their careers, Florian Hartmann and Michael Monheim have successfully led European businesses into the U.S. market — offering not just advice, but real-world experience and trusted execution.

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Florian Hartmann
Florian Hartmann

Founding Partner

Florian is a seasoned entrepreneur and investment banking executive with 25+ years of U.S. market expertise at firms like J.P. Morgan, Commerzbank , Lampe Capital and Transcend Unlimited / VIVAYA.

Raised in a family with a legacy of leading large corporations, he developed a strong interest in business strategy, innovation, and global expansion from an early age, nurturing a deep understanding of complex markets and a strong international growth perspective.

Florian specializes in turning strategic visions into operational success, with expertise in market entry and strategic partnerships. He has consistently enabled European businesses to establish and scale in the U.S., while mitigating risks and accelerating their growth.

Michael Monheim
Michael Monheim

Founding Partner

Michael is a media and business development executive with 30+ years of transatlantic market expertise. He has led U.S. digital expansion at Axel Springer, and held senior roles at SevenOne Media, RTL, AccuWeather, Blockbuster, Viacom/MTV Networks, and Vivaldi Group.

Coming from a multi-generational entrepreneurial family that built a leading European family business, he was immersed in business strategy and development, and international expansion from an early age. 

His unique expertise in market entry and strategic partnerships allows him to guide European companies successfully through the complexities of expanding into the U.S. with a pragmatic, hands-on approach.

Companies we worked with:

JP Morgan
Axel Springer
RTL
Vivaldi
MTV
Viacom
Baknhaus Lampe
Commerzbank
VIVAYA

Our Value to You

Five decades of experience

Five decades of combined experience in the U.S. market, deep local knowledge, and an exceptional network of industry experts.

Proven Track Record

Proven track record in helping European companies avoid common pitfalls, accelerate time-to-market, and achieve sustainable growth in the U.S.

Customized Strategies

Customized strategies, precision execution, and direct engagement that drive successful U.S. market entry and long-term growth.

Ströer

“AtlanticNexus represents exactly the kind of experienced, hands-on partner European firms need when entering the U.S. market.

Florian Hartmann was instrumental in our successful U.S. expansion. He developed and executed a custom-tailored market entry strategy that balanced opportunity with careful risk management. As our interim CEO, he oversaw everything from regulatory approvals and licensing to hiring, operations, and infrastructure – all with exceptional precision,commitment and leadership. The foundation he built enabled us to scale confidently and sustainably. With AtlanticNexus, Florian and Michael bring that same strategic focus and executional excellence to companies aiming to succeed in the U.S.”

Leonhard Uphues
Leonhard Uphues

Former Member of the Executive Committee Bankhaus Lampe KG
Senior Advisor, CEE Group

Ströer

“I had the opportunity to work closely with Michael Monheim during aufeminin’s U.S. expansion, when I was part of the Global Executive Team. At the time, aufeminin had been acquired by Axel Springer, and Michael led the U.S. office – driving the company’s sales and digital transformation efforts.

I saw the impact of his work firsthand. Michael was a key force behind our growth strategy – leveraging his exceptional network and deep understanding of the market to establish our position as a credible media player in the U.S.

Companies entering the U.S. today would be hard-pressed to find someone with Michael’s combination of vision, relationships, and executional excellence. It’s exactly this kind of experience that makes him, and AtlanticNexus Partners, such valuable allies for any European company navigating U.S. expansion.”

Marc Schmitz
Marc Schmitz

CEO, Ströer Publishing

American Council on Germany

“AtlanticNexus Partners brings the strategic clarity and on-the-ground expertise that European companies need to adapt to the specificities and subtleties of the US market. I’ve worked with Michael Monheim for several years during RTL’s U.S. expansion to succeed and benefit from the incredible growth accelerator of this amazing North American market. He was one of the key drivers of our growth strategy, and I’ve seen the impact of his work up close. Leveraging his exceptional network and deep market insights, Michael helped us to become a strong and competitive player for our international media expertise and a total video powerhouse in the United States, as we were helping fast-moving brands to succeed in their growth and advertising plans in Europe.

Companies entering the U.S. today can only win from meeting Michael and Florian for their unique expertise and smart approach based on a combination of vision, relationships, and executional excellence.”

Chris Loisel
Chris Loisel

Global Growth Director, RTL AdAlliance

American Council on Germany

“At a time when strong transatlantic business ties are more important than ever, AtlanticNexus plays a vital role in helping European companies navigate the complexities of entering and growing in the U.S. market. Florian and Michael bring not only deep market expertise but also a long-standing personal commitment to the transatlantic relationship. Florian has been an active member of the American Council on Germany for nearly 30 years, and both he and Michael have consistently championed partnership, trust, and collaboration across the Atlantic. Their work is grounded in shared values and a firm belief in the enduring strength of German-American cooperation.”

Steve Sokol

President, American Council on Germany

Contact us today to explore the U.S. market

Whether you’re exploring opportunities or ready to launch, let’s build your U.S. success story together.