Guenter Kielmayer

Volksbank Investmentbank AG is a private equity firm. The private company is based in Vienna, Austria and has subsidiaries in Austria.

Powerlines Group GmbH provides construction and power engineering infrastructure facilities. The firm specializes in the electrification of railway tracks, with focus on the design and maintenance of catenary systems of long and short-distance networks. It also engages in the implementation of power infrastructure projects for rail-mounted vehicles and trolley buses. The company was founded in 2006 and is headquartered in Wolkersdorf im Weinviertel, Germany.

SPL Powerlines GmbH & Co. KG provides planning, installation and maintenance of energy infrastructures. It designs and develops electric products. The company was founded in 1997 and is headquartered in Vienna, Austria.

Emeg Electrical Ltd. provides a range of specialist services, and operators of rail facilities and sidings. Its services include rail depot systems, M&E rail, design services, rail traincare services, and M&E building services. The company was founded by Richard Simmonite in 1997 and is headquartered in Chesterfield, the United Kingdom.

Black Diamond Security Ltd. is a nationwide provider of security services and solutions. The private company is based in London, UK. Established in 2010, the British company aims to bring the highest clarity of services, combining them into a grounded security setup, with the convenience of just one contractor partnership. The company provides fully licensed security officers that are trained specifically to the sector that they work in, as well as providing mobile rapid response to alarm activations across the nation. Black Diamond Security focuses on being at the forefront of service delivery and innovation, and from their innovation centre, their technology department researches and designs solutions from discreet personal security to obtuse temporary security systems that can deter from a far. The company was founded in 2010 by Martin William Hawley, Ian Raeburn. Martin William Hawley has been the CEO since 2010.