G2Plus makes your energy more efficient

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More competence for more efficiency

G2Plus are the two strong Gs from GASAG and Gegenbauer who combine their skills and experience.This partnership shows the willingness of both companies to offer trend-setting services and individual customer solutions for the future.G2Plus started in September 2016 and has already been successful in a wide variety of energy efficiency projects. GASAG and Gegenbauer are two companies with competence and diverse experience, a long tradition and economic strength in the field of energy supply and facility management.The companies guarantee a reliable pool of competent and experienced energy efficiency experts, consultants and engineers. As a result, G2Plus has extensive, interdisciplinary and well-founded know-how.

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Our goal is the optimal energy efficiency of your property in order to reduce costs and protect the environment.Profitability, sustainability and legal requirements are requirements that you can meet with our help. For this purpose, G2Plus uses the most modern methods and the latest technologies from both renowned companies as well as from specialized partner companies.

Our experts for more energy efficiency

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G2Plus is a team of experienced experts. In order to be able to offer tailor-made and individual solutions, G2Plus also draws on a large pool of expertise at Gasag and Gegenbauer. This unique network also includes recognized external specialist engineers.

Geschäftsführer der G2Plus GmbH Herr Wolff

Dipl.-Ing. André Wolff

Managing Director

Mr Wolff has over 20 years of experience in managing major projects in the field of technical building equipment. As the head of plant engineering at one of the largest technical building services companies in Germany, he managed a technical planning office as well as a highly effective building department. Mirroring the lifecyle of a building in his professional career, he then devoted himself to the area of facility management as a branch manager at a large FM service provider. There, he provided training to the energy management/energy efficiency area. Under his leadership, an energy management system according to DIN EN 50001 was launched at a service company with over 15,000 employees. Mr Wolff is currently the company officer of G2Plus GmbH as well as Gegenbauer Facility Management GmbH.

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G2Plus Mitarbeiterin Frau Horn

Jennifer Horn

Team assistant

After graduating from high school, Ms. Horn began training as an office clerk at the Gegenbauer Group, not least with a focus on the Gegenbauer Facility Management division. Ms. Horn began her position as an assistant to the management at Gegenbauer. Since then, Jennifer Horn has continued to educate herself in both the commercial and building technology areas. As a team assistant at G2Plus, she also provides support in consulting activities in the field of energy services.

G2Plus Mitarbeiter Herr Frost

Dipl.- Ing. Andreas Frost

Project Manager for Energy Services/Auditor (BAFA)

Mr Frost began his career as a mechanic for the maintenance of machine tools. He then completed a degree as a graduate engineer in mechanical engineering in the metal processing industry. Following his studies, he worked as a process engineer, IT project engineer and sales engineer in the manufacturing industry. A switch to consulting led to an ongoing specialisation in the direction of energy management. Among other roles, Mr Frost worked as a project manager in a Federal Ministry of Economics and Technology (BMWI) funding programme for Berlin-Brandenburg on the topic of ‘Energy Transition for SMEs’. Mr Frost has supported G2Plus since its founding as an energy consultant for SMEs and as an auditor (Federal Export Office) for DIN EN 16247-1.

G2Plus Mitarbeiter Herr Kaehne

Mario Kähne

Project Manager for Energy Services

Mr Kähne started his professional career as an industrial electrician. His further training at the Chamber of Crafts in Frankfurt (Oder) as a master mechanical engineer served as the basis for managing larger projects including, for example, object monitoring in accordance with HOAI (Fee Structure for Architects and Engineers) Service Phase 8 in public buildings and hospitals or the introduction of automation technology for recording system states, the drafting of control strategies as well as automatic invoicing for the customer. Mr Kähne became qualified in the area of switching equipment for operating and handling electrical systems using 1 kV to 30 kV in the course of further training at TÜV Süd, where he also obtained certification as a person in charge of fire alarm systems according to DIN 14675. He has supported the team at G2Plus as a project engineer for energy efficiency consulting and the implementation of energy services measures since mid-2017.

Unsere Mitarbeiterin Frau Schönebeck

Jessica Schönebeck

Marketing and Project Manager for Energy Efficiency

Ms Schönebeck, a certified real estate agent, began her career at a housing association in Hamburg. She completed a bachelor’s degree with a technical focus in the area of facility management at the Münster University of Applied Sciences in cooperation with Beiersdorf AG in Hamburg. Following a semester abroad in Helsinki, Finland as part of an English-language master’s programme at the HTW Berlin – University of Applied Sciences, she was employed in the real estate services area at an international FM service provider in Dublin, Ireland. She then joined Gegenbauer Facility Management in Berlin and worked closely together with Gegenbauer and G2Plus to successfully complete her master’s in digitisation and Industry 4.0 in the area of energy and facility management. Ms Schönebeck has worked as a marketing and project manager for energy efficiency at G2Plus since summer 2017.

Unser Mitarbeiter Herr Villain

Sebastian Villain

Project manager energy efficiency

Already during his studies as a process and environmental engineer at the Technical University of Beuth, it was very important to Mr. Villain to gain practical experience. Initially, Mr. Villain worked alongside his studies as a student trainee at a listed vehicle and mechanical engineering group. As part of the practical phase of his studies and to support his thesis, he switched to the G2Plus GmbH team. Since successfully completing his studies, Mr. Villain has been working as a project manager and studying energy and resource efficiency while working.

Unsere Mitarbeiterin Frau Henkiel

Justyna Kowalinska-Henkiel

Finances and controlling

After successfully completing her business school in Poland, Ms. Kowalinska-Henkiel studied education with a focus on German at the University of Poznan. She completed her academic career with a Masters in Communication and Information Management. After several years as a foreign language correspondent at a subsidiary of Bundesdruckerei in Poland and working as an assistant to the management, she found her way back into the world of finance. She opened this up with various training courses in corporate accounting and controlling and expanded her knowledge and skills to become a financial specialist. Ms. Kowalinska-Henkiel has been supporting G2Plus in business financial planning processes since mid-2018. She is responsible for the commercial issues within G2Plus. These include reporting, invoicing and budgeting as well as operational controlling.

Frank Ehorn

Frank Ehorn

Project manager energy efficiency

Mr. Ehorn began his professional career with practical training as a heating fitter. This enabled him to gain many years of experience both in plant construction and in the maintenance and operation of technical systems. Through his later studies as a business economist and further training as an energy manager, he looks at system efficiency from a technical and commercial point of view. Thus, Mr. Ehorn not only has an eye for energy efficiency potential, but also for cost savings for the customer. In addition to assessing system efficiency, he also focuses on the development of individual customer solutions. Frank Ehorn is also constantly undergoing further training, most recently as a quality manager and quality auditor according to DIN EN ISO 9000ff and DIN EN ISO 19011 at TÜV Nord. As a certified project manager, Mr Ehorn has been supporting the G2Plus team as the energy efficiency project manager since the beginning of 2020.

Lars Prophet

Lars Prophet

Project manager for power plant construction (state-certified technician)

Lars Prophet began his professional career as a gas and water installer. After his training and basic military service, he worked as a heating engineer for a well-known system manufacturer in Berlin. After several years of professional experience, he successfully passed the state-certified technician exam in the field of heating, air conditioning and sanitary technology. He then works in project management in the HLS area at a certified specialist company for the installation of heat pumps and geothermal heating. As an additional qualification, Lars Prophet has knowledge of the drinking water hygiene regulations according to VDI / DVGW. Mr. Prophet has been supporting the G2Plus team as a project manager for energy plant construction in the area of implementation and operation since 2020.

G2Plus GmbH Salomé Gautier

Salomé Gautier

Project manager energy service

Ms. Salomé Gautier was trained in “Engineering” at the Ecole Centrale in France and in “Clean Energy Engineering” at the University of British Columbia in Canada. There she discovered the enormous potential of the topic of energy efficiency in the real estate energy sector and set herself the goal of reducing the energy consumption of buildings with an intelligent and efficient use of energy. Ms. Gautier was able to gain her first practical experience handling ASHRAE energy audits in public buildings in Metro Vancouver. After moving to France, she then carried out energy analyzes and audits in accordance with DIN 16247 in office buildings, primarily in the Paris region. Ms. Gautier also supported customers with the implementation of BREEAM® In-Use and NF HQE™ certifications and thus got to know other aspects of sustainability in buildings and operational management. Among other things, she gained extensive knowledge in the areas of environmental quality of products and environmental policy in companies. Salome Gautier has been strengthening the team of project managers at G2Plus GmbH since the beginning of 2021.

G2Plus GmbH Christian Laakmann

Christian Laakmann

Project manager energy efficienc

Christian Laakmann started his professional life as a media designer and media specialist at a Hamburg digital printing company. He later switched to a photo book provider in Berlin, where he worked as a project manager in production and logistics. In addition to his professional activity, he began studying environmental technology/renewable energies at the Berlin University of Applied Sciences in 2014. He completed this with a Master of Science in Renewable Energies with a focus on climate-friendly building, solar thermal energy and electrical energy systems. Christian Laakmann has also been working professionally in engineering since 2016. As an energy consultant, he wrote neighborhood, urban development and energy concepts, prepared feasibility studies and worked on the master plan for the state capital Potsdam. He then expanded his field of activity into technical building equipment. As a project planning engineer, he worked on the energetic renovation of the heat generation system portfolio of a large housing construction company. Mr. Laakmann has been part of the G2Plus team as a project manager for energy efficiency since 2021.

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