Management at innogy Consulting

Dr. Klaus Grellmann,
Managing Director

Professional experience

Managing Director
innogy Consulting GmbH, formerly RWE Consulting GmbH

since January 2007
Location: Essen, Deutschland

When I started as Managing Director in 2007, I had the ambition to transform the company from process and IT consulting into a highly profitable top management and strategy consultancy. Today, innogy Consulting is involved in almost every project on board level and operates in full competition to the top 3 external consulting firms. Throughout the years, we have expanded internationally into core energy markets of Europe and Middle East. Moreover, we have grown our business by adding specialized practices such as Change, Lean and Innovation. In addition, we are focusing heavily on the digital transformation and the associated changes that all companies in the industry have to face. Our Digital Unit in Düsseldorf and the LRN LAB in Berlin are strong additional units of innogy Consulting. We manage projects along the entire energy value chain and have constantly supported the RWE Group with its transformation from a large utility into a modern European Energy company. With the recent successful IPO of innogy, this transformation achieved a gigantic milestone. More than a third of our 160 consultants supported the RWE Group with this challenging but exciting project.

VP strategic planning

April 2003 – December 2006
Location: Essen, Germany

As Head of Strategic Planning, I was responsible for the Group Strategy. Together with my team of 12 colleagues, I managed several initiatives: - Design of M&A activities - Disinvestment of non core activities - Emphasize on organic growth - Prepare market entry for Central Eastern Europe - Design and start up of a renewable business

Senior Manager Corporate Finance

May 2002 – May 2003
Location: Berlin

After my experience in the US, I was key account manager for a DAX company. In this role, I led a team in an acquisition of a wind energy business. Furthermore, I was involved in a project with a Central Eastern European government on a potential privatization initiative.

Senior Manager Energy Practice


May 2001 – May 2002
Location: Houston, Texas

For one year I worked in the US for PwC's Management Consulting Service in the Energy practice. During that time, I participated in several very exciting projects: - Creation and go live of a joint venture in the Oil industry
- Corporate Strategy for one of the Top 5 US utilities - Trading strategy and risk management for a US utility - Lead of post-merger integration of a US utility acquired by a EU investor

Senior Manager Corporate Finance

July 1998 – April 2000
Location: Berlin Area, Germany

During my first years at PwC, I was involved in the implementation of the first electricity trading floor in Europe as well as the design and go live of the European Energy Exchange (EEX).


Referee for economics and business model developments
Vereinigung Deutscher Elektrizitätswerke – VDEW e.V.

July 1996 – June 1998
Location: Berlin



Universität Hamburg
Doctor of Philosophy (Ph.D.), Economics
1988 – 1996
Doctorate at "Institut für ausländisches und internationales Finanz- und Steuerwesen Subject: Success and failure of tax haven politics

Advanced Management Programme

London Business School
Corporate Finance Programme