Salas O'Brien · 17 hours ago
Mechanical Engineer Intern - Summer 2026
Chesterfield, MO
Internship
Onsite
Intern
Start in 2026 SummerSalas O'Brien is seeking a Mechanical Engineer Intern for Summer 2026. The intern will provide support in mechanical design, collaborate on project deliverables, and develop proficiency in engineering software under the guidance of Senior Mechanical Engineers.
IndustrialMechanical EngineeringIndustrial Engineering
Responsibilities
Being an entry level Mechanical Engineer, adhering to company, department, and client standards and procedures, and having a general understanding of required mechanical design drafting
Following procedures and collaborating to prepare design deliverables that meet project requirements under general supervision of Senior Mechanical Engineers
Using data from structural and electrical disciplines, as well as client and vendor information sources to prepare mechanical design
Performing, with guidance, mechanical calculations, flow sheet and P&ID development, plant equipment and systems design, specifications, equipment bid packages, piping and related equipment design, duct and chute design, and HVAC system design
Developing knowledge of mechanical materials, construction methods, and applicable building codes, including but not limited to ASME, Industrial Ventilation Guidelines, and CEMA Standards
Work on 1-2 project designs simultaneously and meet strict deadlines
Actively participate and contribute to project and interdepartmental meetings to facilitate successful completion of projects and to meet customer expectations and needs
Strive to increase efficiency in all aspects of mechanical design
Understand and apply concerns of safety, maintenance, accessibility, constructability, and coordination
Register point clouds
Develop flow sheets
Assist in preparation of construction documents and design deliverables
Size mechanical equipment with direction
Create and modify 3D models for design work
Issue and record drawing submittals and revisions, and Requests for Information, with guidance
Identify, communicate, and explore solutions to design challenges, conflicts, and clashes
Be capable of developing proficiency in the use of Revit and AutoCAD
Have or be able to effectively develop knowledge in the use of Excel, Belt Analyst, Pipeflo, and other calculation software
Develop an understanding of equipment best practices
Develop basic knowledge of structural design and equipment support practices
Assist in material take-offs for development of construction quantity estimates
Perform vendor drawing coordination to ensure design intent is met
Qualification
Required
Current enrollment in Bachelor of Science in Engineering program (Mechanical preferred)
Excellent communication skills with an understanding of teamwork and the requisite ability to coordinate work with internal and external project stakeholders
Strong organization skills to effectively manage time and resources in the most efficient manner
The ability to multi-task on several projects and adapt to changing scopes and deadlines
Diligent note taking during project discussions
Efficient and organized email communications
Commitment to maintaining the company's professional image and reputation with timely, error-free, accurate deliverables, which meet or exceed clients' expectations
Company
Salas O'Brien
Salas O'Brien is a national leading Facilities Planning, Commissioning, Construction Management and Mechanical, Electrical.
Founded in 1975
1001-5000 employees
H1B Sponsorship
Salas O'Brien has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (15)
2024 (3)
2023 (2)
Funding
Current Stage
Late StageTotal Funding
unknownKey Investors
Blackstone Group
2024-01-22Private Equity
Leadership Team
Paul Silva
Chief Operating Officer
Karl F. Frey
Retired
Recent News
Sports Business Journal
2025-10-24
FoodProcessing.com
2025-10-16
Company data provided by crunchbase