Team & Company

Wattler’s name stems from two words: “Watt”, the unit of power what energy is made by, and “butler”, the one who serves his boss with his comprehensive knowledge. Fitting to our mission, isn’t it?

Who we are?

The team consists of professionals with various professional background from the field of the energy sector. What we share is our committment to quality, value creation for our customer and the vision of Wattler.

Ders Németh

MD, co-founder

The team is led by Ders Németh. “I have been working in the energy sector since 2009. I have been located in three countries (Hungary, Switzerland, Croatia); gained experience in a wide spectrum: strategic planning, deal structuring, negotiations, contracting, trading & hedging as well as retail and end-customers sales; led smaller and bigger teams of various nationalities. I’ve been mainly active in natural gas markets with some exposure to electricity. Spending this time in the industry made me like it a lot thanks to its complexity, quick evolution and great impact on everyone’s life. However, especially in the CEE region, experience tells me that the energy sector is lagging behind in terms of bringing about innovation which causes pain and lost value for companies & customers alike. Good news, the solutions are out there, they just need to be implemented. Wattler was founded to make this happen.”

e-mail: dn@wattler.euLinkedinTwitter

Krisztina Tarjányi

MD, co-founder

“I have 9 years’ experience in energy sector. As a graduate student I started to work for the Institute of World Economics  (Hungarian Academy of Sciences) as a Junior Research Fellow where I wrote papers on energy markets. Later I worked 4 years at MOL Hungarian Oil and Gas Company in Upstream division. Since 2012 I’ve been taken part in several natural gas related projects of MVM Hungarian Electricity Plc.. I was a member of the Board in South Stream Hungary Ltd. and Hungarian Gas Storage Ltd. In 2013 I acquired my second degree as Specialist in Energy (at Regional Centre for Energy Policy Research of Corvinus University). My experience accumulated as a result of strategic analysis and implementation of several Hungarian and international oil, gas and (partly) electricity projects.”

e-mail: kt@wattler.euLinkedin

Clément Rebillard

certified energy advisor and auditor, engineer

“I work in the energy sector as I think that energy conservation is essential to sustainable development and environmental protection. I have worked for 7 years in France in a multinational company as a research engineer, developing energy efficiency in the industrial sector. I recently moved to Hungary where I acquire experience in the building and transportation sectors. In 2017 I acquired the Energy Auditor certification (according to the European Energy Efficiency Directive), as well as the Hungarian “Energy rapporteur” certification. Relying on a strong scientific knowledge basis and believing in innovation, reactivity and quality of work, I joined Wattler to help promote energy efficiency amongst energy consuming companies.”

Elérhetőségek: cr@wattler.euLinkedin

Győző Cserhalmy

certified energy advisor, architect

As an an architect and building energy engineer as well as certified energy advisor, Győző oversees the building related audits and other projects. He’s got a 40 years of experience in planning, he’s been conducting energy audits and certifications since 2010. His work is present among us in the forms of buildings, cultural heritage refurbishments and award winning plans.


Balázs Bajmóczy

energy advisor and market analyst

Balázs Bajmóczy graduated as an energy engineer at Budapest University of Technology and Economics in 2017. As an entry level engineer, he applied to Wattler because besides engineering, he was always interested in the economics of the energy industry. Accordingly, he works as an energy advisor and makes analyses on the natural gas market, while he is also finishing his masters’ degree. e-mail:

Beáta Abonyi dr.

client responsible

Beáta has a law degree. In her previous career, after serving a shorter stint at a law office she had been active in various support positions. “I like the flexibility and the drive in Wattler. It feels good to be part of this team.” e-mail:

Dávid Sándor Horváth

junior energy engineer

Dávid Sándor Horváth has graduated as an electrical engineer at Budapest University of Technology and Economics in 2016, specialized in Power Engineering. He continued his studies on Master’s. In 2018 he started working at Wattler as a trainee, then stayed on at our company. His field of interest is quite wide, his studies mainly focus on Power System Engineering and Building’s Electricity. However he gladly deals with nearly everything. At our company he supports our energy advisors and assists us during audits. e-mail:

Péter Margitházi

junior energy engineer

I was strongly attracted by the topics of sustainability and innovation, that is why I chose modern energy: Wattler. I believe that conscious energy consumption is a lifestyle, this is what I try mediating to our clients. We live in a time of eco-hipsters: everyone is growing plants at home, and hops on their bikes to commute. Why shouldn’t we transfer this kind of mentality to the companies as well? e-mail:

Our Mission Explained

Wattler’s mission is to improve competitiveness of small and mid-size businesses by showing how to decrease consumption and the price tag of energy.


Along the lines of new technologies (big data, mass customization), we believe that also the energy engineering consultancy can be more efficient thus cheaper for the clients. This is what we will offer, gradually widening our portfolio of services. As we have extensive knowledge and experience in the field of energy trading and retail, this service is also offered to our clients. In case of any further questions, get in touch. Check out our webpage (only in Hungarian) about our energy consumption and efficiency consultancy.

Natural Gas Supplies

Wattler started supplying natural gas to its business customers in 2018 in Hungary. We believe that in a while the need of middle man will diminish in the energy sector just as it did in the travel industry for instance. That is why we embarked on the mission of becoming a smart gas supplier for businesses, so that we can widen the scope of services to them achieving our vision. Wattler App Ever wondered why you don’t have any good solutions for tracking your energy use, while there are zillions of apps for tracking your sport activity, calorie intake, monthly spending, etc? If not, it is because the whole topic has not been in the forefront of public discourse. This is what we are about to change with a good looking and easy to use App. Simple input, useful stats, that’s the key for an application what people will like. The first version will be good fit for households and small businesses alike. The android version is expected to be out at the second half of February. Updates will follow. Hence, we are eager to receive any recommendations for further features, if you have anything in mind, share with us. Download the App on Google Play!

Webpage and Blog

As a first step we have set up our webpage – to create a blog and later further spur innovation of these fields by every other means. The logic is simple – your expense of energy is Price x Volume consumed. We focus on both elements to achieve a magnified result in cutting costs. In fact these are the two pillars of the Wattler blog.  We believe in  1) technological development which can greatly help everyone in becoming more energy efficient as well as 2) markets and competition, which ultimately results in higher efficiency thus lower prices.  Plus, on the way to achieve our goal we also help the environment which is definitely an extra. Both pillars are interesting – and promise many exciting topics to be covered, ranging from behavioral change, practical tips & tricks, technical enhancement possibilities and analysis, explanation of the gas & electricity bill, description of the energy markets locally, in Europe and globally. We’ll be covering all this step by step, so stay tuned. Why small and mid-size businesses? Because in our region we feel that they’re neglected segment in terms of energy. The big industrials are wooed by the energy suppliers with ever-lower prices and they have budget for cutting-edge energy management software and equipment. The households, on the other hand, are pampered by the politicians to make them happy with low energy prices. The small and mid-size businesses can feel left behind. This is something we are about to change. As for the region, we are focusing mainly to the Central Eastern European region, where the above stated is especially true. At the beginning the country-specific articles tackle Hungarian-related issues. For this reason, most of the content will be bilingual. We believe, however, that many posts and articles will be interesting for everyone, not only for these particular groups. We always welcome your opinion and feedback either on the comments section or by email. If you like our articles, remember, sharing is caring.