Dietmar Heise advises large corporations and medium-sized businesses on all matters pertaining to employment law and he also advises corporate bodies and executives on contractual issues. He specialises in advising on employment law aspects in restructurings (transfers of undertaking, negotiating reconciliation plans, social plans and company bargaining agreements), other issues under works constitution law and also matters related to collective bargaining and industrial action law as well as all matters concerning board members, managing directors and senior executives. Another focus of his work is assisting with the employment law aspects of agile projects and advising on temporary employment issues, including differentiating between temporary employment and third-party work on the basis of service contracts or contracts for work and labour. In matters relating to the right of co-determination, Dietmar Heise has advised several works council and supervisory board elections, which included dealing with how to cancel or contest them. His industry focus is retail and wholesale trade as well as the automotive, mechanical engineering and logistics industries.
Before joining Luther in 2004, Dietmar Heise was a member of the Board of the Confederation of German Employers' Associations (BDA) and simultaneously the Managing Director of the service company GDA, a subsidiary of the BDA. Previously, Dietmar Heise had been responsible for the employment law practice area and the collective bargaining policy at Metro AG and, among other responsibilities, was the deputy head of the BDA's employment law department; he also worked as a research assistant for Prof. Wolfgang Hromadka at the University of Passau, Germany. For a period of nine years, from 1999 to 2008, he sat as an honorary judge for the Federal Labour Court.