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Process optimization – restructuring – executive coaching – strategy implementation

ACA stands for quality, efficiency and success

We are ACA Aerospace Consultancy Associates GmbH, a team of experts in the areas of operations, supply-chain management, human resources and finance. We support you in crisis- and change management situations as well as restructuring phases, helping you shape the future of your company. The ACA team provides you with practice proven methods and tools, and helps you put them into operation by collaborating with your team on site – concrete support, when and where you need it!

Better results thru sensemaking change

The first step towards sensible change in a complex environment is linking up data to obtain valuable, sound information. If you take this into a social context and filter out what is really important, the relevant knowledge is condensed. Providing a basis to create competitive capabilities.

We adapt to your individual circumstances and support you with our many years of extensive experience in coaching and consulting to reduce and cope with the complexity of your challenges. For positive value added for you, your customers and your company.


Years of experience in national and international companies and corporations has made us what we are today – experts in the field of corporate change management and implementation of policies and strategies. We adopt a practical approach, working closely with all levels and interfaces within your company, and providing you with expert support which translates into a direct benefit for you. Whether you seek to increase customer satisfaction, ensure supplier compliance, optimise work processes, motivate your workforce and tackle internal conflicts or to overcome a crisis, we can help!


Our range of services includes consulting, effective on-site implementation of concepts and optimisation of internal company processes.

ACA for you

We offer consulting for supervisory board members, executives, managers and their teams working in national and international corporations as well as small and medium-sized enterprises. Our services cover the fields of corporate governance, human resources, finance, engineering, procurement, production and quality assurance.

Reference projects

Our clients benefit from the determination, expertise and efficient delivery of the ACA team. We have listed some of our reference projects for you to see how we work.


The core ACA team consists of six experts Stephan Barlet, Mathias Krahnert, Dr. Thomas Lehmann, Rolf-Stefan Scheible, Dr. Andreas Rohne and Bert Stegkemper, who all have many years of international experience as managers and in the operational business at renowned companies. This core team is complemented by a network of consultants with sound experiences in various  industry and demanding change projects.