46 experienced mechanical engineer jobs found in St. Louis

Job Type Full-time Description We are seeking an experienced Fire Protection Professional Engineer (PE) to lead the design, analysis, and implementation of fire protection and life safety systems across a variety of commercial, industrial, and institutional projects. This role provides technical leadership, ensures code compliance, and supports clients in achieving safe, resilient, and cost-effective solutions. Key Responsibilities Fire Protection System Engineering Design and develop fire suppression, detection, and alarm systems (e.g., wet/dry sprinkler systems, clean agent systems, fire pumps, mass notification). Prepare engineering drawings, specifications, and technical reports. Code Compliance & Life Safety Interpret and apply relevant codes and standards (e.g., NFPA , ICC , IBC , IFC , FM Global ). Conduct building code and life safety analyses, including egress, occupancy classification, and hazard assessments. Collaborate with AHJs...

Make an impact by joining ServiceSource, a champion for people with disabilities. Explore new opportunities! ServiceSource is an organization of talented people who drive innovation, embrace change, and strengthen communities. Make an impact by joining ServiceSource, a champion for people with disabilities. Explore new opportunities! ServiceSource is an organization of talented people who drive innovation, embrace change, and serve humanity. Job Summary The Facility Electrical Engineer III Project Manager will be subject matter expert for all aspects of electrical engineering at the site. Creates small capital improvement, repair contracts, and building models using AutoCAD and Revit. Assists operations with electrical equipment and distribution systems trouble-shooting and recommendations. The role is also instrumental for campus facilities and data center project engineering and project management. Primary Duties Reasonable accommodations may be made to enable...

Job Type Full-time Description BHMG is leader in utility-focused engineering and consulting, serving electric companies, municipalities and organizations with large energy needs. For over 50 years, we've been the trusted partner organizations rely on to solve complex challenges and reimagine what's possible. We empower our team, encourage ownership and innovation, and create an environment where you can enjoy your work, do your best, and make a meaningful impact for our clients. At BHMG, you're not just doing a job-you're building a meaningful career with a company that lives its mission every day: Build Trust. Provide Solutions. Enjoy Freedom. About the Role Designed for an early career individual, the Transmission Line Engineer role offers the opportunity to develop specialized expertise in transmission line design, project coordination, and early mentorship responsibilities. This position combines hands-on design work with growing accountability for quality,...

Overview Roeslein & Associates is a global leader in engineering, manufacturing, and construction services, specializing in modular, pre-fabricated solutions for the energy, beverage, and industrial sectors. With a focus on safety, innovation, and sustainability, Roeslein delivers turnkey project execution from concept to commissioning. Our team is driven by a commitment to quality and client success, operating across North America, South America, Europe, and Asia. Why Join Roeslein? At Roeslein, you're not just taking a job - you're becoming an employee owner. As part of a 100% ESOP organization, you share the success you help create while building a long-term career with a company that invests in its people. A Values Driven, People-First Culture We live by a simple but powerful ethos: Remain Humble. Stay Hungry. Be Happy. That means: Working hard and continuously improving Treating people with respect and integrity Prioritizing safety and quality in...

Overview Roeslein & Associates is a global leader in engineering, manufacturing, and construction services, specializing in modular, pre-fabricated solutions for the energy, beverage, and industrial sectors. With a focus on safety, innovation, and sustainability, Roeslein delivers turnkey project execution from concept to commissioning. Our team is driven by a commitment to quality and client success, operating across North America, South America, Europe, and Asia. Why Join Roeslein? At Roeslein, you're not just taking a job - you're becoming an employee owner. As part of a 100% ESOP organization, you share the success you help create while building a long-term career with a company that invests in its people. A Values Driven, People-First Culture We live by a simple but powerful ethos: Remain Humble. Stay Hungry. Be Happy. That means: Working hard and continuously improving Treating people with respect and integrity Prioritizing safety and quality in...

Job Type Full-time Description Engineering excellence, built on people-first values. At LUZCO, we're more than an engineering firm - we're a familia. We pair technical excellence with a culture rooted in respect, flexibility, and genuine care for one another. Here, you're known by name, supported as a whole person, and encouraged to bring your authentic self to work with competitive benefits, and the flexibility to support life both inside and outside of work. We're proud to be a 2025 and 2026 Best Place to Work in St. Louis and a woman-owned, minority-owned boutique firm, delivering impactful engineering solutions in a workplace where people feel valued and empowered to grow. Why You'll Love LUZCO Benefits that take care of you: Top-notch medical, dental, and vision insurance; a competitive 401k match; generous PTO; student loan repayment assistance; and an employee recognition platform that celebrates your wins big and small. Flexibility that fits your life: We...

Birch Creek Energy, a utility-scale solar development company with projects throughout the United States, is seeking an experienced Electrical Project Engineer who thrives in our team-oriented culture and shares our mission to create a future with more renewable energy. Birch Creek was ranked #3 on Inc. 5000's list of Fastest Growing Companies in 2023. Our headquarters is in St. Louis, with an additional office location in Los Angeles. The ability to work from our STL or LA office is a plus factor, but remote-work candidates are also welcomed. Job Overview: Reporting to the Sr Director of Execution Engineering, the Electrical Project Engineer is responsible for managing engineering from late-stage development through completion of construction. This position is an integral part of executing Birch Creek Energy's 13 GW of solar and battery storage project pipeline in multiple states throughout the U.S. Through design review and construction support, the Electrical Project...

Make an impact by joining ServiceSource, a champion for people with disabilities. Explore new opportunities! ServiceSource is an organization of talented people who drive innovation, embrace change, and strengthen communities. Job Summary This position is responsible to provide facility engineering, project management, construction and renovation services and support of daily facility operations, space renovations, and repair projects. This shall include, but is not limited to energy management, decommissioning, Building Automation System (BAS) administration and operation, Computer Aided Design & Drafting (CADD), and Building Information Modeling/Management (BIM) efforts in support of daily facility operations, maintenance technical support, and project development as well as project management and execution services Primary Duties Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. These duties and...

Weaver Consultants Group is growing and seeking highly motivated professionals in the Indianapolis area. From design to engineering and permitting assistance, no other privately-held engineering firm offers a more comprehensive range of services to the Solid Waste industry than our diverse team. Whether you're a student, early career professional, or seasoned leader, Weaver Consultants Group provides a place where you can flourish throughout the many stages of your career. We invest in our employees' personal and professional development, empowering them to learn, grow, and reach their maximum potential. Responsibilities Manage projects and delegate responsibilities and tasks as assigned Manage a certain amount of Net Revenue Performed and a percentage of Profit of Net Revenue Performed Assist and implement site layout grading, drainage, site utilities, including design of force mains, leachate collection systems, landfill gas collection systems, storm water management and...

About Us Clayco is a full-service, turnkey real estate development, master planning, architecture, engineering, and construction firm that safely delivers clients across North America the highest quality solutions on time, on budget, and above and beyond expectations. With $8.1 billion in revenue for 2025, Clayco specializes in the "art and science of building," providing fast track, efficient solutions for mission critical, industrial, life sciences, power & energy, aviation, commercial, institutional, residential and sports & entertainment related building projects. The Role We Want You For The Virtual Design and Construction (VDC) Engineer will become a strategic asset within a growing business unit and the key member of our project teams. As part of VDC team you will be involved in a range of activities throughout the design build cycle that are essential for a successful project delivery. These activities include support and implementation of Clayco's Digital...

An internship at Oates Associates means hands-on engineering experience in the office and in the field. You will prepare for your future by assisting project managers and engineers with project assignments and developing skills with our in-house training sessions. Typical responsibilities include office work such as CADD drafting, computations and spreadsheet work; and fieldwork including condition assessments, surveying, construction staking, testing and observation. Internships are available year-round. The ideal candidate must meet the following minimum requirements: Currently enrolled at an accredited 4-year college or university with preference given to juniors and seniors Working toward a bachelor's degree in civil engineering or a related field A valid driver's license and authorization to work in the United States Strong technical and communication skills Previous experience at other engineering consulting firms or government agencies is a plus Working knowledge of...

Summer 2027 - Operations Engineer Collegiate Associate Intern (St. Louis) in GAC St. Louis Unique Skills: Your Future Takes Flight at Gulfstream: Summer 2027 At Gulfstream, a proud division of General Dynamics, Collegiate Associates apply classroom learning to real-world challenges and gain valuable experience. You'll work alongside skilled professionals in a culture built on integrity, pride, and excellence-preparing you for future success in the aerospace industry. This role is in St. Louis, Missouri. The facility is located at the St. Louis downtown airport, only minutes from exciting downtown St. Louis. What You'll Experience • Real-world projects that make an impact • Exposure to innovative practices • Opportunities to build skills and professional connections About the position The Completions Operations Engineering team in St. Louis is seeking enthusiastic and driven students for an internship within our Engineering group. If you're passionate about...

About Us Clayco is a full-service, turnkey real estate development, master planning, architecture, engineering, and construction firm that safely delivers clients across North America the highest quality solutions on time, on budget, and above and beyond expectations. With $8.1 billion in revenue for 2025, Clayco specializes in the "art and science of building," providing fast track, efficient solutions for mission critical, industrial, life sciences, power & energy, aviation, commercial, institutional, residential and sports & entertainment related building projects. About LJC LJC Design & Engineering is a full-service architecture, engineering, and design firm committed to enhancing the quality of the human experience through integrated design. We are a team of high-energy professionals who share a passion for design, a collaborative approach, and a casual culture. We solve challenges by leveraging the collective expertise and ingenuity of the best and brightest...

Job Type Internship Description Engineering excellence, built on people-first values. At LUZCO, we're more than an engineering firm - we're a familia. We pair technical excellence with a culture rooted in respect, flexibility, and genuine care for one another. Here, you're known by name, supported as a whole person, and encouraged to bring your authentic self to work with competitive benefits, and the flexibility to support life both inside and outside of work. We're proud to be a 2025 and 2026 Best Place to Work in St. Louis and a woman-owned, minority-owned boutique firm, delivering impactful engineering solutions in a workplace where people feel valued and empowered to grow. Why You'll Love LUZCO Benefits that take care of you: Top-notch medical, dental, and vision insurance; a competitive 401k match; generous PTO; student loan repayment assistance; and an employee recognition platform that celebrates your wins big and small. Flexibility that fits your life:...

Senior Mechanical Engineer Job Description Job Information Job Title Senior Mechanical Engineer Reports To Director of Engineering Location St. Louis, MO Number of Direct Reports 0 About Murphy Company Since 1907, Murphy Company has been a leading mechanical contractor in the St. Louis and Denver markets that provides its professionals the environment, opportunities, technology, and tools to experience a rewarding career. Being a company that prides itself on its core values of employee well-being, enduring relationships, and integrity and professionalism, we know it starts with our employees. We strongly believe our people are our most important asset, and we strive every day to make Murphy a great place to work as we build our clients' visions. We Are Looking For Someone Like You Murphy Company is currently seeking a Senior Mechanical Engineer or Designer to work in a Design-Build and Design-Assist environment in the St. Louis, MO office. This...

About Us Clayco is a full-service, turnkey real estate development, master planning, architecture, engineering, and construction firm that safely delivers clients across North America the highest quality solutions on time, on budget, and above and beyond expectations. With $8.1 billion in revenue for 2025, Clayco specializes in the "art and science of building," providing fast-track, efficient solutions for industrial, commercial, institutional, and residential related building projects. About LJC LJC Design & Engineering (LJC) is a full-service architecture, engineering, and design firm committed to enhancing the quality of the human experience through integrated design. We are a team of high-energy professionals who share a passion for design, a collaborative approach, and a casual culture. We solve challenges by leveraging the collective expertise and ingenuity of the best and brightest minds across development, design, engineering, and construction. The Role We...

We are seeking an electrical engineer with planning, design, and construction-related services experience. The ideal candidate enjoys interacting with clients and is a pragmatic problem solver capable of working through unique technical challenges and employing proven solutions to meet our clients needs. As an integral member of our multiple discipline project teams, you will be involved with all phases of electrical engineering for water, wastewater, and stormwater infrastructure. This includes low and medium power distribution (through 34.5 kV), motor control, grounding and lightning protection, exterior and interior lighting, standby power generation systems, MCC design, specification writing, and construction cost estimating. You will have the opportunity to work on some of the largest municipal water/wastewater treatment facilities in the U.S. This position is open for any Donohue office location. Requirements: B.S., Electrical Engineering PE registration 4+ years...

Job Type Internship Description Engineering excellence, built on people-first values. At LUZCO, we're more than an engineering firm - we're a familia. We pair technical excellence with a culture rooted in respect, flexibility, and genuine care for one another. Here, you're known by name, supported as a whole person, and encouraged to bring your authentic self to work with competitive benefits, and the flexibility to support life both inside and outside of work. We're proud to be a 2025 and 2026 Best Place to Work in St. Louis and a woman-owned, minority-owned boutique firm, delivering impactful engineering solutions in a workplace where people feel valued and empowered to grow. Why You'll Love LUZCO Benefits that take care of you: Top-notch medical, dental, and vision insurance; a competitive 401k match; generous PTO; student loan repayment assistance; and an employee recognition platform that celebrates your wins big and small. Flexibility that fits your life:...

For over 50 years, Byrne & Jones has been a trusted leader in sports, parks, and civil site development. We're known for delivering high-quality, buildable projects and for building long-term relationships with our clients and communities. You'll join a collaborative, experienced team where your expertise is valued, your growth is supported, and your work makes a visible impact in our communities. Byrne & Jones is looking for a Project Manager, Engineer to lead civil design efforts for sports, parks, and site development projects. This role combines hands-on engineering, design review, and leadership while working closely with clients, agencies, and internal teams. What You'll Do: Lead, design, and review civil designs (grading, drainage, stormwater, turf-base systems) Collaborate with estimating, project management, and sales teams, attending client hand-off meetings and providing ongoing project support Provide QA/QC for work produced by Civil Designers and Project...

Build your career while making an impact within your community. Oates Associates is a 100% employee-owned civil and structural engineering firm focused on enhancing our community. We combine strong client relationships with technical expertise to turn concepts into reality. Oates Associates offers a work environment that encourages and supports you during your career development journey. To accommodate our continued growth, we are seeking a project manager with a focus on building structural engineering to work on new building and renovation projects. This position is ideal for a structural engineer that enjoys working with clients on building expansions, repairs, renovations, and stand-alone buildings ranging from $10k to $20M. The selected candidate will also mentor junior staff, review their work for quality and accuracy, and support their ongoing technical growth. Qualifications Bachelor's degree in civil engineering or architectural engineering - master's degree is a plus...