Our people are our biggest asset
Every colleague has a distinct combination of skills varying from project management, change management, and leadership, with experience from different industries and business functions. Our consultants all share the ability to manage people with empathy, which allows them to bring energy, drive and a new perspective to the front line, while also acting as an extension of our client’s teams.
Meet the team
Meet the team

Martin Hartenstein
Managing Director | Germany and Switzerland
Martin Hartenstein
Managing Director
| Germany and Switzerland
Martin is the managing director of Orphoz, Switzerland. He brings more than 20 years of expertise in strategy implementation and performance and operating model transformation programs. Martin has experience in leading teams on a wide range of operational impact situations and functions in various industries, such as banking, insurance, private equity, and start-up scaling.
Martin has co-authored several books and articles on management tools, recruiting, and emerging technologies.
Martin holds degrees from Karlsruhe Institute of Technology (KIT) in Germany (PhD in Entrepreneurship), Rochester University in the US (M.Sc. in Wealth Management), University Berne in Switzerland (M.A. in Finance) and University Saarbrucken (MBA) in Germany.

Vira Kakhnych
Senior Delivery Consultant | Poland
Vira Kakhnych
Senior Delivery Consultant
| Poland
Vira is a senior delivery consultant of Orphoz, Warsaw. She has experience in project and program management, specifically in tech companies, and enjoys staying up-to-date with new digital trends and dynamic changes in the technology market.
As a senior delivery consultant, Vira partners with clients to deliver the best-in-class transformations, implement new strategies, improve their operations and implement new IT solutions.
Born in Lviv, Ukraine, she spent most of her adult life in Cracow, Poland, where she completed her master’s degree in international business.

Maximilian Lutz
Senior Delivery Manager | Switzerland
Maximilian Lutz
Senior Delivery Manager
| Switzerland
Maximilian is a senior delivery manager of Orphoz, Switzerland. Prior to joining Orphoz, he was leading a team for digital analytics and technology transformation topics at a major global consulting firm.
He brings 9+ years of experience in management consulting with a focus on digital transformation; data analytics and target operating model design for service operations mostly in the energy, automotive and private equity sector.
He currently leads transformation projects in the energy sector and is focused on growing and developing the local team in Switzerland.
Max holds a B.Sc. and M.Sc. in Financial Management and Accounting from the Nordakademie Graduate School in Germany, focusing on technology transformation topics in finance.

Nayla Challe Khoury
Delivery Director | France
Nayla Challe Khoury
Delivery Director
| France
Nayla is a Delivery Director of Orphoz, France. Before joining Orphoz, she worked as a strategy and operations consultant in the Asian, African, and Middle Eastern markets.
She specializes in implementation programs in the financial sector. Nayla recently led the European digital transformation of the assistance & services business unit of a major insurance company. She also specializes in integration management cross sectors.
Nayla is a graduate of the University of Michigan and has an MBA from the American University of Beirut with a fellowship from the University of Pennsylvania.

Sébastien Lacroix
Senior Partner, Orphoz Global Leader | France
Sébastien Lacroix
Senior Partner, Orphoz Global Leader
| France
Sébastien, a senior partner in our McKinsey Paris office, is the global leader of Orphoz. He oversees the various Orphoz hubs, ensuring close collaboration between Orphoz and other parts of McKinsey, including functional and industry practices.
Sébastien specializes in growth, marketing, distribution, digital and post-merger integration issues, advising clients in banking, wealth management, insurance, and luxury, as well as private equity funds. He advises clients throughout the entire journey of their transformations. From designing the best solution to providing long-term support and helping build clients' capabilities on the ground, Sébastien helps clients achieve sustainable bottom-line results over time.

Olalla Montes
Partner, Managing Director | Iberia
Olalla Montes
Partner, Managing Director
| Iberia
Olalla is a managing director of Orphoz, Iberia. She specializes in organizational topics, implementation methodologies, and management of large transformation projects. She supports clients in Europe, Latin America, and Africa.
Olalla brings extensive experience in long-term transformations and mobilizing leaders across organizations – from C-suite to the shop floor – to deliver impact. Before joining Orphoz, Olalla led the scale-up of the technology arm of a strategy and investment consulting firm, where she worked with clients across sectors (natural resources, energy and industrial goods), with a focus on digital/innovation transformations. Prior to that, she worked as an associate partner at McKinsey & Company.
Olalla has a degree in business administration and Management from the Deusto Business School (DBS) and an MBA from INSEAD.

Maciej Kalbarczyk
Managing Director | Central Europe (CE)
Maciej Kalbarczyk
Managing Director
| Central Europe (CE)
Maciej is a managing director of Orphoz, Central Europe (CE), which covers teams in Poland, Hungary, Czechia and Ukraine.
In his work, Maciej focuses on operations and execution across industries, with a special focus on companies with physical assets (like Energy, Transport or Manufacturing).
Over the last years, he has co-led more than ten large transformations across 4 continents, combining implementation and change management expertise.
Maciej holds an MBA from INSEAD.

Thémis Redon
Senior Delivery Manager | Switzerland
Thémis Redon
Senior Delivery Manager
| Switzerland
Thémis is a senior delivery manager of Orphoz, Switzerland Geneva. She has more than 10 years of experience in consulting, banking, energy, chemicals and transportation.
Her areas of expertise include working hand-in-hand with clients on large transformation projects pertaining to: mergers & acquisitions, re-structuring, business process reengineering and digitization.
Thémis graduated summa cum laude with a Master of Arts (MA) in Corporate Strategy & Governance from Nottingham University Business School and with a Master of Science (MS) in Management from KEDGE Business School.

Sertan Eratay
Managing Director | Turkey and Azerbaijan
Sertan Eratay
Managing Director
| Turkey and Azerbaijan
Sertan is an expert associate partner in our Istanbul office and managing director of Orphoz, Turkey and Azerbaijan. He has strong experience in digital transformation strategy and implementation, digital business building, e-commerce boost, marketing transformation, international expansion, and start-up venture building.
Prior to joining McKinsey, Sertan acted as the managing director of R/GA’s (NY based leading digital agency) Istanbul and Middle East office. Sertan also has 20 years of deep experience in digital transformations in telecom and retail banking based on his previous leadership roles at Turkcell (Mobile telecom company) and Garanti BBVA (Retail bank).

Mélanie Mueller
Delivery Manager | Hungary
Mélanie Mueller
Delivery Manager
| Hungary
Melanie is a delivery manager of Orphoz, Budapest. Before joining Orphoz, she worked for a premium automotive player for more than 16 years.
As a delivery manager, Melanie often joins McKinsey teams when the strategy is defined and the client is about to embark on the implementation journey – in order to ensure a smooth transfer between McKinsey and the operational functions of the clients and stay on to support implementation.
Melanie helps the client drive the initiatives and follows the implementation plan to ensure all goals are reached. She is there to provide daily coaching on the ground, throughout the journey.
Melanie graduated with a degree in business administration at Steinbeis University Berlin.

Jerry Sigmund
Delivery Manager | Germany
Jerry Sigmund
Delivery Manager
| Germany
Jerry is a delivery manager of Orphoz, Germany. He has long-term industry experience working as a project manager commissioning highly automated assembly lines for automotive clients.
As a delivery manager, he leads specific workstreams of a transformation, and interacts daily with clients. He provides daily coaching to colleagues and clients to develop their toolkit and their personal development journey.
Born in Wiesbaden, Jerry graduated with a degree in mechanical and process engineering from Technische Universität Darmstadt.

Katharina Anders
Senior Delivery Consultant | Germany
Katharina Anders
Senior Delivery Consultant
| Germany
Katharina is a senior delivery consultant of Orphoz, Germany. She holds a bachelor's in nutrition science and has worked in innovation management, business development, and digital transformation for corporate companies and start-ups.
Originally focused on consumer goods, she currently uses her extensive project and change management knowledge for large-scale transformations in various industries.
At Orphoz, she works with implementation processes, finding pragmatic solutions, motivating people, and developing creative ways to accelerate the change process.

Stephane Bouvet
Managing Director | France
Stephane Bouvet
Managing Director
| France
Stéphane is a managing director for Orphoz in France. He leads the efforts on developing our Orphoz offerings by function, such as digital, merger management, and sustainability.
Stéphane has led numerous start-to-end transformation programs in the financial services, energy & environment and consumer goods, including multiyear global roll-outs. He is an expert in operational performance improvement, optimization of support functions, risk management, and digital transformation.
Before joining Orphoz, Stéphane spent more than 15 years as a partner in management consulting. Stéphane is an engineer from ENSAM and the University of Bristol and holds an MBA from Sorbonne University.
“Orphoz consultants are team players. We’re enthusiastic, proactive and empathetic. We are a team, the best team.”
– Mu-Lim Choi Cha, Fellow Delivery Manager, Spain
Distinctive Talent, Drivers of impact
Our individual differences are what make us strong, better equipping us to help implement a transformation towards an organization of the future.