Senior Mechanical Engineer - Mission Critical

Clayco; St. Louis (MO); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Comprehensive benefits package

Discretionary annual bonus

Generous PTO and paid company holidays

Job summary

A leading construction and engineering firm in St. Louis is seeking a Senior Mechanical Engineer to lead mechanical design projects for mission-critical facilities. The ideal candidate will have over 10 years of experience, including at least 3 years focused on data centers and advanced manufacturing. Responsibilities include managing project timelines, budgets, and providing technical mentorship. A competitive compensation package, including a comprehensive benefits plan and discretionary bonus, is offered.

Qualifications

• 10+ years of experience in Mechanical Engineering with focus on mission-critical projects.
• PE License required to seal engineering documents.
• Experience working in a design-build environment is a plus.
• Strong experience in HVAC, plumbing, fire protection systems, and building energy management.
• Proficiency in mechanical design software (AutoCAD, Revit, Trane, Carrier or similar).
• Experience with building codes and standards (ASHRAE, NFPA, IMC) and local/regional codes.

Responsibilities

• Lead the mechanical design of systems for mission-critical facilities.
• Manage project timelines, budgets, and resources.
• Provide technical guidance and mentorship to junior engineers.
• Collaborate with project managers to define project scope.
• Provide technical guidance and mentorship to junior engineers and team members.
• Develop and present detailed reports and design documentation for clients and stakeholders.
• Collaborate with project managers to define project scope, schedule, and deliverables.

Skills

HVAC systems

Plumbing

Fire protection systems

Building energy management

Mechanical design software

Communication

Leadership

Problem-solving

Education

Bachelor’s degree in Mechanical Engineering

Tools

AutoCAD

Revit

Trane

Carrier

Job description

Senior Mechanical Engineer - Mission Critical

4 days ago Be among the first 25 applicants

Direct message the job poster from Clayco

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 $7.6 billion in revenue for 2024, Clayco specializes in the "art and science of building," providing fast track, efficient solutions for industrial, commercial, institutional, and residential related building projects.

Clayco Design and Engineering (CDE) was created to diversify and grow Clayco’s industrial business unit’s capabilities with a focus on efficiently delivering robust design-build architectural and engineering solutions. The Clayco Design and Engineering team brings a tremendous amount of engineering expertise to the Clayco enterprise from a wide array of industrial segments such as food & beverage, consumer products, manufacturing, and life-science products.

The Role We Want You For

The Senior Mechanical Engineer will lead mechanical design projects, provide technical expertise, and ensure the successful delivery of high-quality engineering solutions for mission‑critical facilities, including data centers, advanced manufacturing plants, and other high‑reliability environments.

The Specifics of the Role

• Lead the mechanical design and engineering of HVAC, plumbing, fire protection, and other building systems for mission‑critical facilities, including data centers, advanced manufacturing plants, and other high‑reliability environments.
• Perform detailed mechanical system calculations and analyses, ensuring compliance with industry standards, codes, and best practices.
• Manage project timelines, budgets, and resources while coordinating with other engineering disciplines.
• Design and specify mechanical systems, including HVAC, piping, ventilation, and fire suppression systems for commercial, industrial, and institutional projects.
• Review and approve mechanical drawings, specifications, and submittals for quality and accuracy.
• Provide technical guidance and mentorship to junior engineers and other team members.
• Develop and present detailed reports, technical specifications, and design documentation for clients and project stakeholders.
• Collaborate with project managers to define project scope, schedule, and deliverables, ensuring client expectations are met.
• Oversee commissioning, testing, and start‑up of mechanical systems to ensure proper operation.
• Manage and track project changes and ensure adherence to project goals, quality standards, and deadlines.
• Stay current with industry trends, emerging technologies, and new software tools to improve design processes and results.

Requirements

• Bachelor’s degree in Mechanical Engineering (or related field) from an ABET institution required.
• 10+ years of experience in Mechanical Engineering, with at least 3 years focused on mission‑critical projects (data centers, high‑tech manufacturing, etc.).
• PE License is required to seal engineering documents, with the ability to attain licenses in multiple states.
• Strong experience in HVAC, plumbing, fire protection systems, and building energy management.
• Proficiency in mechanical design software (e.g., AutoCAD, Revit, Trane, Carrier, or similar tools).
• Experience with building codes and standards (ASHRAE, NFPA, IMC, etc.) and local/regional codes and regulations.
• Experience working in a design‑build or integrated project delivery (IPD) environment is a plus.
• Excellent communication, leadership, and problem‑solving skills.

Some Things You Should Know

• No other builder can offer the collaborative design‑build approach that Clayco does.
• We work on creative, complex, award‑winning, high‑profile jobs.
• The pace is fast!

Why Clayco?

• 2025 Best Places to Work – St. Louis Business Journal, Los Angeles Business Journal, and Phoenix Business Journal.
• 2025 ENR Midwest – Midwest Contractor (#1).
• 2025 ENR Top 100 Design‑Build Firms – Design‑Build Contractor (Top 5).
• 2025 ENR Top 25 Data Center Builders - Data Center Contractor (Top 3).
• Discretionary Annual Bonus: Subject to company and individual performance.
• Comprehensive Benefits Package Including: Medical, dental and vision plans, 401k, generous PTO and paid company holidays, employee assistance program, flexible spending accounts, life insurance, disability coverage, learning & development programs and more!

Compensation

• The salary range for this position considers a wide range of factors in making compensation decisions including but not limited to: Education, qualifications, skills, training, experience, certifications, internal equity, and location. Compensation decisions are dependent on the facts and circumstances of each case.

Seniority Level

Mid‑Senior level

Employment Type

Full‑time

Job Function

Engineering and Design

Industries

Construction, Design Services, and Engineering Services