Opterra Energy Services is a Chicago-based company that works with public sector organisations across education, local government, healthcare and transportation to modernise their facilities and reduce energy costs. With over 50 years of experience, they deliver tailored solutions covering operational efficiency, infrastructure upgrades, renewable energy generation, electric vehicle charging infrastructure and water management. They focus on delivering measurable savings and community benefits alongside energy independence and resilience. They would suit referrals from public institutions seeking comprehensive energy and infrastructure solutions.