Skip to main content

Advice that significantly improves commercial performance

For B2B leaders who can't afford to get it wrong.

We move the needle. On what matters most.

We work with B2B companies at critical moments. When growth has slowed or the commercial model needs a reset. When a new market needs to be entered, and entered right. When a leadership gap threatens your momentum. When the stakes are too high and the timeline is compressed.

We don’t support from the sidelines. We’ve run commercial functions, owned P&Ls, and built international businesses from the ground up across several countries. We bring that experience to bear on your most complex commercial challenges, and we stay until the job is done.

Meet the team

Our story

“Sometimes, you need an expert to help you see things differently. Kostas is that person.”

PartnerAdvisory Firm

What we specialise in

International

Expansion

Entering new markets with confidence

For B2B companies ready to grow beyond their home market, without burning capital on the wrong strategy.

Commercial

Performance

Building a world-class commercial engine

When growth has slowed, the team is underperforming, or the commercial model needs a reset.

Strategy &

Fractional Leadership

Senior support for your most critical decisions

For leaders navigating critical moments, M&A activity, or leadership transitions and need a peer in the room.

Headquartered in Switzerland. Active across Europe and the Middle East.

We’re based in Zug, Switzerland, which means we operate from one of Europe’s most connected business hubs. We work with clients across the broader Europe and Middle East region, and we bring particular depth to three markets:

  • In Switzerland and the DACH region, with direct access to the international companies, investors, and decision-makers headquartered across the region.
  • In Greece and Southeast Europe, with deep on-the-ground knowledge, active networks, and a strong understanding of the commercial landscape: valuable both for companies entering the region as well as local champions building their international presence.
  • In the GCC and UAE, with established relationships and senior-level access across key markets. We help you navigate a fast-growing and culturally distinct environment.

If your market is elsewhere in EMEA or APAC, we’ve likely operated there too. Our work happens wherever it needs to.

”Kostas diagnosed in weeks what we struggled with for months. His GTM redesign increased our win rate by 40%.

VP InternationalMedTech

”When we faced a CMO departure, Arxis Partners stepped in, stabilized the team, and executed our launch flawlessly.

CEOHealthcare IT

Our team is here for you

Managing Partner & Founder

Kostas

No one can build and run a commercial engine quite like Kostas. He is our founder and Managing Partner, and the driving force behind Arxis.

From Greece to London, Dubai to Singapore and Switzerland to North America, Kostas has extensive operating experience spanning the full commercial spectrum: from building new businesses and entering new markets to optimizing the GTM strategy, developing partner ecosystems and alliances and driving sales and commercial excellence.

He is a mentor and advisor to start-ups, and a frequent speaker and author on growth strategy, international expansion and commercial model optimisation.

Kostas lives in Zug, Switzerland but works with clients across Europe, the Middle East, and the broader EMEA and APAC region, with particular focus on Greece, Southeast Europe, and the UAE.

Head of Client Operations

Katerina

Katerina handles all operational matters, ensuring every client receives attentive, comprehensive support from start to finish.

Katerina makes everything work behind the scenes. She’s the operational backbone of Arxis Partners and the one who makes sure nothing falls through the cracks.

Katerina is fluent in English, French, and Greek, conversant in German and Spanish, and has a talent for making clients feel genuinely looked after, no matter where they’re based or what challenge they’re facing.

When she’s not at work, Katerina is planning her next travel adventure, exploring new recipes, or perfecting her multilingual small talk over good coffee.

Head of Delivery

Greg

Greg is our project and process delivery expert and has oversight of our infrastructure and backend analytics, reporting and toolkits.

Greg has 15+ years of experience designing and executing transformation initiatives across Europe and Asia Pacific. At Arxis Partners, he has oversight of our project infrastructure, backend analytics, reporting systems, and proprietary toolkits.

He’s a specialist in customer service optimization, data analysis, and process design, which means he knows how to make complex things simple and messy things structured.

When he’s not building frameworks or optimizing workflows, Greg is probably exploring the latest tech trends, enjoying quality time with family, or planning his next getaway to somewhere warm and sunny.