Our Team

Our management team consists of highly motivated individuals with a deep knowledge and experience of their particular function coupled with understanding of how best to apply their skillsets to the renewable energy industry. Furthermore, each team member possesses an inherent passion for the environment and climate change action, suitably feeding into the company’s core goal of playing its part in the green energy transition.

Andre Kempenaars

Chief Executive Officer

Andre has started and lead a diversity of multiple companies before he entered into the renewable sector in 2010. Started in the financial world leading a group of software specialists that covered the implementation of special software in dealing rooms at large Dutch financial institutions. After 19 years working with nulls and zeros, Andre followed his dream and developed, designed, engineered, and constructed the largest indoor skydive facility in Europe in 2006. In the years after the concept was introduced worldwide. In 2010 Andre led a team of engineers to realize a 450 MW windfarm in the North Sea. With that experience he entered the young world of solar in Europe. Worked there as a business developer for Engie in Belgium and the Netherlands. In 2016 Andre challenged himself and started within the Unisun Group in the Netherlands. The challenge paid off and he build the team under his management to the current full EPC and O&M company in Rotterdam. In 2021 a share transfer was achieved and the cooperation with Alternus started. Throughout all of his achievements in every sector, Andre strongly believes that people are the most valuable asset for any business.

Leon Heijkoop

Chief Operating Officer

Leon joined Unisun Energy as Project Development Director in 2018 and progressed into the role of Chief Operating Officer in 2021. Before entering the renewable sector, he held several senior positions in global oil & gas companies overseeing engineering, design, and construction. While based in the Middle East, he successfully delivered multiple major EPC projects. Most notably, he was a partner in the development, installation, and sale of the World’s largest and tallest observation wheel (250m) in Dubai. His broad experience and skill set is integral to the company’s success.

Aurelie Volkman

Office and HR Manager

Aurelie Volkman joined Unisun Energy in 2019 as HR & Office Manager. She oversees all administrative & HR functions for both Unisun Energy and Uper Energy. Prior to joining the team, she worked as a project and human resources manager in an advertising firm and held several manager positions in the retail industry. She brings several years of HR & project management experience to the role.

Marc Ebben

Business Development Manager

Marc joined Unisun Energy in 2020. He oversees business develpoment activity across both Unisun Energy and its O&M company, Uper Energy. Prior to joinig the team, he held both management and Director sales roles in leading packaging companies such as Kappa, SKG and Weidenhammer before moving to Stora Enso and Corex. In his final years in the packaging industry, he focused on developing packaging made from renewable materials for FMCGs. It was through this work that Marc realised he wanted to work in a sustainable-focused industry which led him to Uper Energy.

Nathan D’Souza

PV Engineer

Nathan recently joined Unisun Energy as a PV Engineer. Having worked for a year between Engineering and Asset Management in the solar PV sector in the Netherlands he brings an analytical eye to the engineering team. Having worked with data analysis in the operational phase as well as consulting with the engineering of projects he aims to bring innovation while keeping practicality in mind to our engineering. Nathan holds a Bachelor’s in Mechanical Engineering and a Master’s in Renewable Energy Engineering with a specialisation in solar PV.

Vinod Kumar

PV Engineer

Vinod is an engineer with master’s on Sustainable Energy Technology from Technical University of Delft. He worked with TNO in developing an energy model for a first of its kind Solaroad ‘A solar energy harnessing bike path’. He has 4 years of experience in the field of solar energy, worked extensively on a broad spectrum of PV industry from residential PV, building-integrated PV and utility-scale PV. He is with Unisun energy since 2019. He is actively involved in engineering utility-scale PV and O&M activities to maintain and optimize the park. He is constantly looking out for newer sustainable technologies to widen the services provided by the company. He is currently working on drone technology to map the health of the solar park and hence optimize the same.

Ronald van Drunen

Project Manager

Ronald joined Unisun Energy in January 2020. He oversees the engineering and installation of solar projects. Before joining the company, he held a senior project management role at Vamed AG overseeing the construction of hospitals. He has also worked across large scale telecom and hosptial construction projects while working for Interoute Netherlands B.V. Prior to this, he gained considerable technical experience while working as a project manager of busbar systems at Alpha rail koker Batenburg. Following this, his career in the renewable sector began working on residential renewable energy systems at BAM.

Iris Kempenaars

Marketing & Communication

Iris joined Unisun Energy team in 2019 as the Marketing and Communications Executive. She is responsible for all marketing and communications across both Unisun Energy and Uper Energy. This work includes website and social content creation and management, marketing collateral and branding.