Non - Executive Director

Aliyu Labaran holds a BSc in building science from the Texas

Southern University in Houston and is a member of the Nigerian Institute of Building, as well as being a registered building inspector with the Southern Building Code Congress International in the USA. He has had a long career in public service and held various positions, including being the coordinator of the technical team appointed by the Secretary to the Government of the Federation and the Officer in charge of the Building Unit of the Maintenance Division of the Nigerian Presidency. He retired from public service in 2015.


Managing Director

Mr Heckelmann holds a Masters Degree in Architecture from the University Of Applied Sciences Of Wiesbaden in Germany and was previously employed by Julius Berger in Nigeria for over 14 years as an Architect, Site Manager and Project Manager. He has been involved, as Architect and Project Manager, in a number of high-profile, large-scale construction projects in Nigeria, including the ECOWAS parliament, the United Nations Headquarters and the Abuja International Airport. Prior to moving to Nigeria, Mr Heckelmann held a number of positions in the Engineering Company MSEC in Tripoli, Libya. Mr. Heckelmann also worked in the Engineering Company Dyckerhoff & Widmann, at Stuttgard, Frankfurt a.M. and Mainz, etc as an Architect and Project Manager.


Company Secretary and Legal Adviser

Barrister Nwosisi holds of Bachelor of Laws Degree and was admitted to the Nigerian bar in 2002.

She is GW Schroeder’s Company Secretary and Legal Adviser and was previously a legal officer at Yahaya Mahmood and Co., a Legal Counsel and Practice Manager at Adewole Adebayo & Co. and a Legal Officer at Jude & George Solicitors & Advocates.

Barrister Nwosisi is versed in Commercial and Cooperate law and has attended many International law conferences. She is also proficient in litigation practice.


Director: Civil Engineering

Mr Fietkau holds a Masters Degree in Civil Engineering specialising in soil construction, hydraulic engineering, foundation engineering and soil mechanics from the Technical University of Braunschweig. Before joining GW Schroeder, he worked for Julius Berger in Nigeria and was responsible for the civil works in relation to the erection of a LNG plant in Port Harcourt, as well as project managing a number of other projects, including road works and the construction of bridges in Kano State. Mr Fietkau has also worked on a long-list of civil projects in Berlin, Braunschweig, Essen and elsewhere for a number of companies, including Bilfinger + Berger, Hochtief and Wiemer &Trachte.


Director: Operations

Mrs Kronemann-Fluhr holds a degree in Civil Engineering form the Technical University of Karlsruhe in Germany and was previously employed by Julius Berger in Nigeria for seven years between 2008 and 2015.

During this period she was involved in a number of high-profile projects in Nigeria, including the supervision and optimisation of production plants in Abuja, optimising and controlling the consumption and work performance and equipment and sites for the Systems Easy Fleet project, the supervision of the railway construction site in Warri and production plants in Lagos. Prior to Julius Berger in Nigeria, Mrs Kronemann-Fluhr was involved in a range of projects in Frankfurt a.M., Stuttgard, Mannheim, Hamburg and several other German cities.


Director: Mechanical and Electrical Engineering

Dr Vlahovic holds a Doctorate in Electrical Engineering and, amongst others projects, has worked under contract for Julius Berger for around 25 years. He has designed and supervised a number of WEP, HVAC, power generation, communications and security systems and escalator and elevator projects across Nigeria, most notably, these include Central Bank of Nigeria administrative building, hospitals in Abuja, roads and bridges in Lagos, the Abuja Airport, the Palms shopping centre in Lagos, the Marriott Hotel in Lagos, the Abuja conference centre and several hotel projects. Prior to moving to Nigeria, Dr. Vlahovic was involved in a range of projects across Germany, Spain and several other countries.


Director: Marine and Survey Engineering and Environmental Services

Mr Mielke holds a Masters degree in Survey Engineering. Before joining GW Schroeder as Director of Survey Engineering, he was employed by Julius Berger in Abuja where he was the Chief Surveyor and was involved in the construction of the Central Bank of Nigeria towers, as well as a host of other projects in the country.

He also worked on the EGTL Escravos Gas to Liquid project for Chevron and as the Chief Surveyor and Planner for MSEC in Benghazi in Libya, as well as for Ed Zublin in Singapore and BB-Tahi Construction in Thailand.


Head: Equipment and Machinery

Jörg Lippert-Lenzu is an electrician with a long track record of maintaining and managing machinery and equipment, including aircraft, trucks, cars and hospital and healthcare equipment.

Prior to joining GW Schroeder he was employed by Ziegel Homberg to produce concepts for electrical installations, as well as being responsible for planning, coordinating and advising on installations.

Mr. Lippert-Lenzu was also previously employed by Vipharm for the training of clinical personnel in their Oncology and Haematology equipment usage.


Head: Carpentry and Formwork

Otto Koebele having obtained qualifying certificates from Offenburg College of Draughtsmanship and Carpentry, and subsequent practical experience, as a draughtsman and a master carpenter and formwork systems expert.

He worked as a carpenter Supervisor in Philip Holzmann AG from January 1988 to December 2002. From January 2003 to March 2004, he worked as a carpenter Supervisor at Peag (Catch Hold Company). Mr. Koebele was the Carpenter and Concrete Supervisor 1 tunnelling at Porr Technoban Munich. He then worked for nine years in various roles as the Supervisor Scaffolding, formwork, Concrete and Finishing works, and manager of Carpentry Workshop with Julius Berger International Plc, prior to joining GW Schroeder as Head, Carpentry and Formworks.