Summer 2026 Internship – Thermodynamics & Power Plant Performance (Vistra Corporation)

If you have what it takes to become part of the Vistra family and would like to start a promising career with a global leader, take a look at the exciting employment opportunities that are currently available and apply online. Job Summary 📌 About Vistra Vistra is a Fortune 500 integrated retail electricity and power generation company. Our Power Optimization Center (POC) leverages advanced monitoring, diagnostics, and optimization technologies to ensure reliability, efficiency, and innovation across our diverse fleet of generation assets. 🚀 Internship Overview We are seeking a Summer 2026 Intern to join our POC team with a focus on thermodynamics and performance analysis of power plants. This role is ideal for students pursuing mechanical engineering, energy systems, or related disciplines who want to apply their academic knowledge to real-world challenges in the energy sector. Interns will gain exposure to performance monitoring, efficiency optimization, and diagnostic strategies that support safe, reliable, and cost-effective operations. Job Description 🛠 Key Responsibilities Analyze thermodynamic cycles and performance data from Vistra’s fleet of power plants. Support the development of models and tools to evaluate plant efficiency, heat rate, and output. Collaborate with engineers to identify performance bottlenecks and optimization opportunities. Assist in creating dashboards and reports that track key performance indicators (KPIs). Document findings and present project outcomes to the POC team and leadership. Will be assigned various engineering projects.　 Comply with safety policy and procedures to ensure a safe working environment Possess the ability to work independently and in a fast paced environment All other duties as assigned 🎓 Qualifications Pursuing a Bachelor’s or Master’s degree in Mechanical Engineering, Energy Systems, Nuclear Engineering, or related field. Strong foundation in thermodynamics, heat transfer, and fluid mechanics. Familiarity with power plant operations and energy conversion systems preferred. Proficiency in at least one programming or modeling tool (Python, MATLAB, Aspen Plus, or similar). Strong analytical and problem-solving skills. Excellent communication skills for presenting technical concepts clearly. Must be a U.S. Citizen or Permanent Resident. Students sponsored through Optical Practical Training (OPT) or Curricular Practical Training (CPT) are　NOT eligible for this internship. Official transcripts must be received from your school prior to start date Must be in good academic standing with your school 🌱 What You’ll Gain Hands-on experience with power plant performance monitoring and optimization. Exposure to enterprise-scale diagnostic systems within Vistra’s POC. Mentorship from experienced engineers specializing in thermodynamics and plant operations. Opportunity to present your work to senior leadership and contribute to operational innovation. Job Family General Services Company Luminant Generation Company LLC Locations Irving, Texas Texas We are a company of people committed to: Exceeding Customer Expectations, Great People, Teamwork, Competitive Spirit and Effective Communication. If this describes you, then apply today! If you currently work for Vistra or its subsidiaries, please apply via the internal career site. It is the policy of the Company to comply with all employment laws and to afford equal employment opportunity to individuals in all aspects of employment, including in selection for job opportunities, without regard to race, color, religion, sex, sexual orientation, gender identity, pregnancy, national origin, age, disability, genetic information, military service, protected veteran status, or any other consideration protected by federal, state or local laws. If you are an individual with a disability and need assistance submitting an application or would like to request an accommodation, please email us at assistance@vistraenergy.com to make a request. Vistra (NYSE: VST) is a leading Fortune 500 integrated retail electricity and power generation company based in Irving, Texas, that provides essential power resources to customers, businesses, and communities from California to Maine. Vistra is the largest competitive power generator in the U.S., with a capacity of approximately 41,000 megawatts, or enough to power 20 million homes, operating in all of the major competitive wholesale markets in the country. Vistra is a leader in the energy transformation and expansion with an unyielding focus on reliability, affordability, and sustainability, powered by a diverse portfolio that includes natural gas, nuclear, coal, solar, and battery energy storage facilities. The company continues to grow its zero-carbon resources, operating the second-largest fleet of competitive nuclear power plants in the country, substantial battery energy storage capacity, and a growing number of solar facilities. Vistra is one of the largest competitive electricity providers in the country and takes an innovative, customer-centric approach to retail, offering solutions to meet customers’ needs, including more than 50 renewable energy plans. Through its family of retail brands, Vistra serves approximately 5 million residential, commercial, and industrial retail customers. As a leader in the responsible transformation of the country’s energy supply, Vistra has made significant progress towards its 2030 and 2050 targets. The company has committed to a 60% reduction of Scope 1 and 2 greenhouse gas emissions by 2030, as compared to our 2010 baseline, and net-zero carbon emissions by 2050, assuming necessary technological advancements and public policy incentives are achieved. Learn more about our environmental, social, and governance efforts and read the company’s sustainability report at https://vistracorp.com/sustainability/. Vistra’s hardworking team is committed to its purpose, “lighting up lives, powering a better way forward” and is guided by four core principles: we do business the right way, we work as a team, we compete to win, and we care about our stakeholders, including our customers, our communities where we work and live, our employees, and our investors. Learn more about how Vistra is powering a better way forward at vistracorp.com. Come join us and be part of something special! Click here to learn more about Vistra. It is the policy of the Company to comply with all employment laws and to afford equal employment opportunity to individuals in all aspects of employment, including in selection for job opportunities, without regard to race, color, religion, sex, sexual orientation, gender identity, pregnancy, national origin, age, disability, genetic information, military service, protected veteran status, or any other consideration protected by federal, state or local laws. If you are an individual with a disability and need assistance submitting an application or would like to request an accommodation, please email us at assistance@vistraenergy.com to make a request.