2 2026 summer internship jobs found

Overview Carollo Engineers is an internationally recognized environmental engineering firm that specializes in the planning, design, and construction of water and wastewater facilities. We are seeking a Civil/Environmental Engineering Intern in our Oklahoma City, OK office to support our vision of becoming the best water consulting firm. As part of our team, you will work on projects related to municipal water and waste plants/infrastructure, including but not limited to, major treatment plant expansions, infrastructure upgrades, regional water quality studies, and critical water reuse projects that will create sustainable and resilient water supplies for the world. At Carollo you'll make an impact at an organization that does meaningful work, fosters a collaborative team culture, and creates a diverse, inclusive environment where you feel like you belong. You'll work alongside a collaborative and dynamic team of professionals that is truly passionate about our work. Carollo's...

Manufacturing Engineering Intern Poteau, Oklahoma, United States Job ID: 519582 Non-Exempt Oldcastle Infrastructure™, a CRH company, is the leading provider of utility infrastructure solutions for the water, energy, and communications markets throughout North America. We're more than just a manufacturer of precast concrete, polymer concrete, or plastic products. We're a trusted and strategic partner to engineers, contractors, distributors, specifiers, and more. With our network of more than 80 manufacturing facilities and more than 4,000 employees, we're leading the industry with innovation and a safety-first mindset. Job Summary Oldcastle Infrastructure is looking for a Manufacturing Engineer Intern. Interns will have the opportunity to apply your classroom-learned skills to track data, analyze processes, and recommend solutions for improvement based on the gathered data from our facilities. This position is expected to start in-person around May 2026 and continue...