We transform the world's leading marketing teams. Deck to done in weeks, not quarters.

We take slides, theory & vagueness and turn them into the organisational structures, processes, and ways of working teams can actually run with.

We are the ones
that come in when
big consulting
leaves the room.

You've been there. When you are left with a flywheel and an ask to deploy it. But nothing in that deck tells your teams where to start because none of it was built to be activated.

Transformation fatigue has set in, and the last thing you need is another consultant that takes three months to onboard and six more to run a discovery you've already paid for. You need to show results. Yesterday.

This is the moment we get the call.

We are a team of experts who have done the job before first-hand.

  • We help leaders clarify their vision, set priorities, and turn strategy into action, especially in new roles or pivotal moments.

  • We redesign roles, processes, and governance so marketing teams move faster, with clear ownership and better collaboration.

  • We make change stick, turning transformation into movement with stories and rituals that drive action.

  • We build alongside you and deploy in-market with your teams across Brand, CX, Innovation, and Growth.

A hybrid of
consultants and
makers, built to
work differently.

Lightning-fast discovery

We start with what you already have. No need to invest more in work you've already done.

AI-powered delivery

Technology has always been our superpower. AI just raised the bar on what “possible” means, allowing us to deliver in days, not weeks.

In-market Deployment

Our work goes beyond the global framework. We make the new way of working tangible and stay with you through successful market rollout.

Momentum creation

We build and sustain momentum to drive transformation at every level and reduce fatigue. From global townhalls and roadshows to enterprise awards and daily nudges.

We work with the world's leading marketing teams.

  • Bayer

    Deployed their new global marketing model market by market. A hands-on roadshow that turns the model into the way teams actually work.

  • The Coca-Cola
    Company

    A key force in the global marketing transformation of the world’s largest beverage company, 200+ projects over five years across strategy, innovation, experience design, capability, and change activation.

  • Philip Morris
    International

    Partnering with global teams on consumer experience strategy and deployment across 49+ markets, inside the most remarkable corporate transformation of the past decade.

  • Carlsberg Group

    Building the transformation roadmap with the CMO office, across every marketing discipline.

  • L’Oréal

    Turning reorg slides into a real reorg. Market by market, division by division, built around the distinct reality of each.

  • CJ Foods

    Helping Asia’s leading food giant build a truly global marketing organisation from the ground up.

Our work

Case study 1
01 / 07

We designed the operating system behind a fandom-led Consumer Engagement Model flipping the investment ratio from investing in Traditional Brands advertising to investing in culture and community through creators and partnerships. In weeks, not quarters.

Case study 2
02 / 07

What works in the west does not work in the east. We put in place a new go-to-market Playbook and re-launched a flagship product for one of the world’s largest tobacco companies in the Philippines, aligning global, regional, and local teams for seamless execution.

Case study 3
03 / 07

We build SWAT teams combining world class operators from the industry with local experts. We land on markets, onboard at the speed of light, and help local teams solve mission critical challenges. From cola wars, to helping a market return to growth after years of stagnation, to piloting a new route to market building experiments within weeks.

Case study 4
04 / 07

We designed and facilitated a 58:hours sprint for a global beverage company launching a challenger product into a culturally entrenched category, delivering two locked route bundles ready for consumer testing.

Case study 5
05 / 07

We turned a single-market discount code into a global referral growth engine active across 49 markets, now driving approximately 26% of acquisition in key regions.

Case study 6
06 / 07

We built the capability framework, employee companion app, and frontliner brand identity for a global retail network. From zero to a working prototype piloted in 3 markets in five months.

Case study 7
07 / 07

We co-built and facilitated the adoption of a global innovation operating system, getting 35 leaders from 9 operating units to commit to a shared framework in a 58:hours sprint.

What makes us
different

  • Pricing
  • Ways of working
  • People
  • Technology

We charge for outcomes, not time or effort. Since day 1 our compensation models reward outcomes and speed, not hours spent. Delivering the same results faster should be celebrated, not penalised. Now there’s a full AI transformation to confirm exactly that.

A consultancy
made by makers.

100% of our team comes from an operator background in marketing, entrepreneurship, the tech startup ecosystem and leading roles in the industry.

Portrait of Costas Mantziaris

Costas Mantziaris

Co-Founder & Managing Partner

Costas co-founded REBORRN in 2018 to help brands make better decisions through sharper strategy and customer-centric experiences. With 20+ years in leadership roles, Costas has led CX, strategy, and transformation work for global CPG and FMCG leaders such as The Coca-Cola Company, Philip Morris International, and Bayer. By merging data with intuition, Costas helps enterprise clients build better experiences.

Portrait of Giorgos Vareloglou

Giorgos Vareloglou

Co-Founder & Managing Partner

Giorgos co-founded REBORRN in 2018 with a thesis that marketing is moving faster than marketers can. With nearly two decades building and scaling businesses, he now partners with global marketing leaders to turn strategy into tangible outcomes. His work spans operating model design, change acceleration, and in-market activation for brands including The Coca-Cola Company, Philip Morris International, L’Oréal, and Bayer. A regular speaker at industry conferences, Giorgos writes about change, people, and how modern marketing organisations should be built.

Portrait of Kelly Panagiotidou

Kelly Panagiotidou

Managing Partner

Kelly is Managing Partner at REBORRN, leading the firm’s operations and organisational design. With 20+ years in leadership roles across hospitality, financial services, and high-growth tech, including ING Group, Starwood Hotels & Resorts, and Tripsta, she specialises in building the operating models, culture, and ways of working that enable performance at scale. At REBORRN, Kelly ensures every engagement runs smoothly, from internal team alignment to client delivery.

Portrait of Dafni Prosalika

Dafni Prosalika

Partner

Dafni helps Fortune 500 companies rethink how they operate, from customer experience and marketing to commercial models for the digital age. Before REBORRN, she led Marketing and Growth for a leading B2B FMCG company in Southeast Europe and headed Commercial at Greece’s largest digital agency. She hosts Marketing Factories, a vidcast in partnership with Effie Europe that goes behind the scenes of the most effective marketing teams. A psychologist by education, Dafni is endlessly curious about what drives people’s choices.

Portrait of Mathilda Nathan

Mathilda Nathan

Partner & Co-Founder & CEO, BORRN

Mathilda is Partner at REBORRN and Co-founder and CEO of BORRN, REBORRN’s zero-to-one venture arm. With 10+ years in leadership roles across the European start-up ecosystem, including Director of Sales Strategy at Deliveroo (12 markets), CRO at Side, and VP of Growth at Zego, she brings deep scaling expertise to enterprise clients building new products and capabilities. A certified Business Coach (INSEAD), Mathilda combines growth strategy with a people-centred approach to leadership.

Portrait of Mike Polizos

Mike Polizos

Practice Lead, Product & Design

Mike leads REBORRN’s experience design practice, a multidisciplinary team of UX designers, storytellers, illustrators, animators, and engineers. He joined as employee #2 in 2018, pivoting from a creative career into consulting, and has since built one of the most awarded design teams in the region, including multiple Red Dot Design Awards. Mike brings innovation to how creative work gets done, helping enterprise clients turn complex challenges into tangible, beautifully crafted experiences.

Portrait of Antonis Ventouris

Antonis Ventouris

Practice Lead, CX & Process Innovation

Antonis leads CX and process innovation at REBORRN, helping teams turn customer, data, and operations complexity into simpler journeys and better performance. With deep expertise across performance marketing, analytics, CRM, and business process optimisation built at Mindworks and iProspect (Dentsu) for brands including Allianz, Mondelez, Eurobank, and The Coca-Cola Company, he designs smarter operating processes that improve experiences end to end.

Portrait of Dimitar Andonov

Dimitar Andonov

Principal Consultant

Dimi is a Principal Consultant at REBORRN with 20+ years in marketing, portfolio growth, and innovation across some of the world’s most iconic global CPG brands. His approach fuses empathy, creativity, and technology to transform products and services into meaningful human experiences. At REBORRN, Dimi helps enterprise clients unlock growth through sharper consumer insight and smarter go-to-market strategies.

Portrait of Vesna Vlahovic Dasic

Vesna Vlahovic Dasic

Principal Consultant

Vesna joined REBORRN in 2025 as a Principal Consultant, bringing 20+ years across marketing, consulting, and commercial leadership in Central & Eastern Europe. She spent 15+ years at The Coca-Cola Company, leading marketing and commercial teams across Austria, Adria, and Bulgaria and delivering award-winning work that balanced creative excellence with measurable impact. Vesna’s approach is grounded in empathy and co-creation. She is currently completing a PhD in Neuromarketing, focused on how technology and human behaviour shape modern brand growth.