S&Z Team
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Kerstin Domin
Art Director
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Christopher Haasen
Principal S&Z North America Inc.
Christopher Haasen
Principal S&Z North America Inc.
Christopher Haasen is Principal of S&Z North America Inc. and manages the office in New York. He advises American, German and international clients conducting materiality analyses, strategy development focusing on sustainability, CR report development, and the integration of CR in the supply chain. Additionally, he is an expert in key performance indicators, ESG rating surveys, and CR software, including Enablon.
Christopher Haasen studied at the University of Oxford (UK) and received an M.Sc. in Nature, Society, and Environmental Policy, graduating with distinction. Prior to his studies at Oxford, Christopher Haasen received his Bachelor of Science in Geography and Economics from the University of Southampton (UK) and the Friedrich-Wilhelms University in Bonn.
Christopher Haasen gained professional experience while at the Deutsche Post DHL Group, where he worked at the Innovation Center and with their internal consulting department, DPDHL Inhouse Consulting. Prior to that, Christopher Haasen worked as a student consultant at MarcAurelConsult and developed a growth strategy for a mid-sized media company. Christopher Haasen is co-Inventor of a Europe-wide patented lamp control module.
Christopher Haasen speaks German and English.
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Levke Klütz
Human Resources Specialist (currently on parental leave)
Levke Klütz
Human Resources Specialist (currently on parental leave)
Levke Klütz is our HR responsible and is your contact for all questions regarding applications and S&Z as an employer.
Levke Klütz studied International Business Administration (B.A.) with an emphasis on the Hispanophone world and a focus on International Organization & Human Resources at Furtwangen University in Villingen-Schwenningen, Germany. After her bachelor's degree, Levke Klütz completed the Master in Management & Human Resources (M.Sc.) at Leuphana University in Lüneburg, Germany. The interdisciplinary master's program examines HR work from the perspectives of business administration, psychology and law, and also allowed insights into sustainability in HR management and the social dimension of reporting.
During her studies, Levke Klütz was able to gain practical experience in diversity management at AUDI AG and HR support and development at Hamburger Hafen und Logistik AG.
Since May 2023, Levke Klütz has been supporting our team as a Human Resources Specialist and is responsible for HR related activities, such as recruiting, HR development and employee retention.
Levke Klütz speaks German, English and Spanish.
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Manfred Richter
Communication Expert
Manfred Richter
Communication Expert
Manfred Richter is always at the service of S&Z for ambitious communication cases. He ensures that the conceptualization and implementation of reporting projects are geared toward target groups.
As an economics graduate, he worked for about 20 years in corporate communications for various corporations. Since 2009, he, along with Claus-Martin Carlsberg, has led the agency Carlsberg & Richter in Munich. Previously, he oversaw BMW Group’s Department of Consolidated Statements, Corporate Publications, and Sustainability.
With his professional experience, he is a competent point of contact for all questions of corporate communications - from basic communication strategy and design to actual implementation. As an expert in corporate and financial publications, he ensures above all that texts and stylistic aspects are reflective of the specific target group. This creates strategies and communication schemes which can be seamlessly integrated into existing structures and will always perform in the best interests of the company.
The communication of sustainability is one of the priorities of Manfred Richter’s work: “No topic is so multifaceted and complex as this. In the long run, only companies with credible, understandable, and stakeholder-oriented content will be successful in their communications. The cooperation of sustainability experts and communication experts provides the perfect conditions for this.“
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John Serrano
Senior Consultant
John Serrano
Senior Consultant
John Serrano advises American and international clients on their sustainability strategy development, including stakeholder engagement, materiality analyses, and CR reporting. He is also an expert in ESG ratings and sustainability communications.
John Serrano holds a Master of Sustainability Leadership from Arizona State University, specializing in sustainability strategy development. Prior to this, John Serrano received his Bachelor of Science in Renewable Natural Resources from Texas A&M University, focusing on strategies for ecosystem management and restoration.
He gained professional experience while at the Vinyl Institute in Washington, DC, where he co-led the development of the industry’s sustainability and communications strategy. Prior to that, John Serrano worked for the U.S. House Committee on Science, Space and Technology where he helped manage Congressional oversight of the nation’s non-defense research and development portfolio.
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Andreas Zamostny
Managing Partner
Andreas Zamostny
Managing Director Schlange, Zamostny & Co. GmbH
President S&Z North America Inc.Andreas Zamostny is Co-Founder and Managing Director of Schlange, Zamostny & Co. GmbH, as well as President of S&Z North America Inc.
Since 2000, Andreas Zamostny has supported dozens of organizations to develop more sustainable processes and products: first as sustainability manager at Otto Group in Hamburg, and from 2005 as senior consultant at the Otto subsidiary Systain Consulting.
In the fall of 2006, he co-founded the consulting company Schlange & Co. with Joachim Schlange.
Andreas Zamostny’s sustainability expertise is built upon his studies in Environmental Sciences, which he completed at the Van Hall Institute in the Netherlands between 1995 and 1999, as well as in a study visit at the Institute for Sustainable Futures – part of the University of Technology in Sydney, Australia – and at Coventry University in Coventry, UK.
The Rio Conference in 1992, the book “The Limits to Growth,” and his personal experience of environmental pollution in Eastern Germany, were pivotal in his career choice.
Outside of his consulting work, Andreas Zamostny is dedicated to developing and transferring knowledge, as well as sharing experiences of how businesses can become more sustainable. He regularly presents at universities, colleges, and student initiatives, as well as participates in debates.
Andreas Zamostny speaks German, English, and Dutch.
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Carolina Zarta
Senior Consultant
Carolina Zarta
Senior Consultant
Carolina Zarta supports North American and international clients with the assessment of their sustainability performance, the development of materiality analyses, sustainability performance indicators and reporting, hotspot analyses in the value chain, as well as with conducting stakeholder surveys.
Carolina Zarta studied Sustainability Management (M.Sc.) at Columbia University in the City of New York. During her studies, she focused on corporate sustainability, analyzing opportunities to integrate sustainability into value chains, clean energy, and climate change. In her master’s capstone, Carolina Zarta worked with the UNDP Inclusive Development and Growth (IDG) on competencies and traits for the achievement of the United Nations’ Sustainable Development Goals (SDGs). Prior to that, Carolina Zarta received her bachelor’s degree (B.E.) in Industrial Engineering from Universidad de los Andes in Bogotá (Colombia). In her bachelor’s thesis, she analyzed sustainable agriculture practices as a business case.
Carolina Zarta gained professional experience through previous strategy consulting and project work in the private sector in Colombia working with the IT industry, financial services, and logistics and transportation. She was also actively involved in pro-bono research and consulting projects with diverse student groups while she studied at Columbia University.
Carolina Zarta speaks Spanish and English.
