Meet the Team

Jacques de Nil is an experienced renewable energy professional with over a decade of expertise in solar energy, electrical systems, project delivery, and energy solutions across Southern Africa. His career has included projects across the African continent, giving him extensive hands-on experience in delivering practical and reliable energy solutions across diverse environments.

As Business Manager at Rentech, Jacques combines his strong technical background with commercial and operational leadership. Known for his solution driven approach and practical understanding of client requirements, he is focused on delivering reliable, cost effective commercial and industrial solar and energy storage solutions while driving sustainable business growth and long term customer relationships.

With over 30 years of experience in the solar industry, Mario Smook brings unmatched depth of knowledge and practical expertise to Rentech. Throughout his career, he has specialized in photovoltaic system design, solar installations, and energy consulting, earning a reputation as a dependable and insightful partner to clients across Southern Africa.

Mario’s professional philosophy is rooted in integrity, efficiency, and customer-first thinking. He combines a hands-on approach with deep technical understanding, ensuring that every solution he delivers meets both performance and budget expectations. His ability to simplify complex energy systems and communicate them effectively to diverse stakeholders sets him apart as a trusted advisor in the field.

From agricultural sites and rural communities to industrial operations, Mario has consistently provided energy systems that enhance sustainability and self-sufficiency. His continued dedication to solar energy and its real-world impact reflects his lifelong passion for creating accessible, lasting solutions that empower people and businesses alike.

Joe Micciarelli is a senior technical expert and sales engineer with over 20 years of experience designing, engineering, and deploying advanced solar energy systems across Africa. His impressive track record spans remote villages, off-grid industrial zones, and urban commercial centers — each with its own unique energy challenges and opportunities.

Joe’s technical capabilities cover every aspect of system development, from feasibility studies and component selection to installation supervision and post-deployment support. He has led cross-functional teams on turnkey solar projects where success is measured not only by energy output but by long-term performance, reliability, and return on investment.

What sets Joe apart is his ability to translate end-user needs into integrated, high-performance energy solutions. He has an exceptional eye for detail, and his engineering decisions are always grounded in both data and experience. Whether he’s working on a rooftop system or a multi-megawatt solar farm, Joe ensures that every phase of delivery is aligned with the client’s goals and the project’s technical requirements.

Joe is also deeply committed to staying at the forefront of renewable technology and sustainability practices. His work continues to shape how businesses across Africa adopt and benefit from clean energy — helping them cut costs, reduce carbon footprints, and build more resilient operations.

Stefan Oosthuizen is a dedicated and skilled Solar Sales Engineer with over ten years of experience in energy system design, installation, and sales support. At Rentech, he works closely with clients to deliver customized, high-efficiency solar solutions across residential, agricultural, and commercial sectors.

His expertise spans hybrid, grid-tied, and off-grid systems, making him an invaluable resource for clients seeking reliable and flexible energy strategies. Stefan’s approach is grounded in technical accuracy and a strong ROI focus — he ensures that every system is not only functional but also financially sound over the long term.

Stefan’s background in both field operations and client-facing roles allows him to bridge the gap between engineering and service delivery. Known for his quick problem-solving abilities, meticulous design skills, and commitment to transparent communication, Stefan builds trust with clients and consistently delivers systems that perform beyond expectations.

Driven by innovation, sustainability, and a passion for clean energy, Stefan is committed to making solar power more accessible and impactful for South African homes and businesses.

Richard Bosch is a seasoned energy executive with more than 20 years of experience driving renewable energy adoption across Africa. His leadership spans all phases of solar project development — from initial needs assessment and stakeholder alignment to design, installation, and long-term support.

As a Business Representative at Rentech, Richard leverages his deep industry knowledge to develop integrated solar solutions that deliver measurable value for clients across sectors. He is especially skilled in identifying opportunities where clean energy can enhance operational efficiency, reduce costs, and promote environmental stewardship.

Richard’s track record includes successful projects in commercial, agricultural, and residential markets. He is known for his strategic thinking, collaborative mindset, and ability to manage complex systems with a results-driven focus. His leadership ensures that clients receive not only superior technical outcomes but also a seamless, professional experience from start to finish.

Above all, Richard believes in the transformative potential of renewable energy. He sees each project as a step toward a more resilient, equitable, and energy-independent Africa — and he works tirelessly to bring that vision to life.