Title: Substation Design Engineer Location: IL-Decatur Job Description: About Ameren Illinois Ameren Illinois provides electric transmission and distribution service and natural gas distribution service. Every day, we deliver electricity to 1.2 million electric and 816,000 natural gas customers in central and southern Illinois. We deliver safe, reliable energy to more than 1,200 communities. Our benefits include: - Medical coverage on date of hire - 100% employer paid cash balance pension plan - 401(k) with company match fully vested on date of hire - Minimum of 15 days paid vacation and 12 paid holidays - Paid parental leave and family caregiver leave Visit our Benefits and Perks Page for more information on benefits provided to regular full-time employees. ​ About The Position The Engineer is responsible for engineering design, project management, and technical support for projects relating to new and existing Bulk, Distribution, and Customer Substations (typically involving voltages up to 138kV). Key responsibilities include: - Establish basic design parameters, writing and evaluating material and construction specifications, direct drawing preparation, and perform cost/benefit analyses. - Project management activities including responsibility for overall project cost and scheduling; coordinating activities related to real estate, purchasing, drafting, construction, operating, and related engineering groups associated with projects. The position requires simultaneously handling multiple projects with varying completion dates. - Technical support activities include providing consulting services to other groups in matters relating to Bulk, Distribution, and Customer Substations. - With an increased interest in green energy and renewables, engineers will be working with solar and other DER customers on projects that will integrate these new clean energy sources into Ameren's existing grid. Qualifications: Bachelor of Science Degree in Electrical or Mechanical Engineering from an accredited college or university required. Completion of Power Option classes as part of college coursework preferred. Electrical background (e.g., college coursework or work experience) is preferred. Professional Engineer (P.E.) License or active commitment to obtain one is preferred. Prefer applicants with Engineer-In-Training (EIT) certification. Substation or related equipment design, option or maintenance experience preferred. In addition to the above qualifications, the successful candidate will demonstrate: Proficiency in use of computers; good analytical, communication and human relations skills; capacity to work on major project teams; ability to handle and prioritize multiple assignments/projects; and the following Ameren competencies: Think Customer, Inspire and Engage, Foster Innovation, Drive Results, Champion Learning, Build Trust, and Be Strategic. Additional Information: Substation Design Engineers have the ability to take advantage of Ameren's flexible work schedule. This position also allows employees to work from home as part of a hybrid remote work policy. Ameren’s selection process includes a series of interviews and may include a leadership assessment process. Specific details will be provided to qualified candidates. *Salary depends upon individual credentials, experience, and position market pay level. Incumbents currently in the existing or similar career path will be considered only as lateral transfe Compensation Range: $71,100.00 - $172,200.00 * This pay range encompasses multiple levels of the role. Career level and compensation depends upon applicant's credentials. At Ameren, base salary is one component of a competitive compensation package for employees. Our pay ranges are broad to allow for movement within our organization and to accommodate different skill sets and levels of expertise. We take into consideration a variety of factors including, but not limited to, skills, abilities, experience, education, credentials, and internal equity when determining the base salary offered. Roles are eligible for additional rewards including annual incentive payments based on individual and company performance. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, ethnicity, age, disability, genetic information, military service or status, pregnancy, marital status, sexual orientation, gender identity or expression, or any other class, trait, or status protected by law.

• Developing and designing Heat Rejection and HVAC systems tailored for data centers. • Selecting appropriate air/water side cooling systems for data centers. • Conducting internal CFD simulations to optimize airflow distribution and ensure efficient cooling. • Designing HVAC systems with redundancy and fault-tolerant features. • Performing heat load calculations for data centers to determine cooling requirements. • Implementing energy-efficient HVAC design strategies. • Ensuring optimal air quality and maintaining appropriate filtration systems. • Collaborating with electrical and mechanical engineers on integration of systems.

• Execute engineering work products from requirements through verification and technical documentation • Collaborate with cross-functional teams to integrate hardware, software, and operational constraints into practical solutions • Conduct technical analysis, risk identification, and trade studies to support design decisions • Present technical status, issues, and recommendations in formal and informal reviews • Contribute to proposal, planning, and execution activities aligned to program milestones • Support compliance with customer, regulatory, and security requirements • Travel up to 25% to support integration, test, customer engagement, and program execution • Design, layout, test, and evaluate mechanical and electro-mechanical devices or subsystems • Perform engineering calculations and analysis to validate design robustness and reliability • Prepare technical specifications, design documentation, and recommendation packages for review • Partner with electrical, systems, manufacturing, and quality teams to mature integrated designs • Support prototype build, test, issue resolution, and transition to production • Develop detailed mechanical models, layouts, and design packages supporting prototype and production release

• Experience with Mechanical Design & Pumping Systems • Design and develop pumping stations, including mechanical layouts and equipment selection • Specify and size pumps, pipework systems, valves, and associated mechanical equipment • Produce detailed design calculations, technical drawings, and specifications • Ensure designs meet performance, reliability, and maintainability requirements • Apply relevant water industry standards, including WIMES • Ensure compliance with health, safety, and environmental regulations • Support design reviews and ensure alignment with project and client requirements • Collaborate with multidisciplinary teams including civil, electrical, and process engineers • Support project phases including design, procurement, installation, and commissioning • Liaise with suppliers and contractors to ensure technical compliance and quality • Identify opportunities to improve efficiency, cost, and sustainability of mechanical systems • Contribute to continuous improvement in design methods and engineering practices • Support the integration of new technologies within water infrastructure projects