Senior Mechanical Design Lead – Capital Projects

Harvestaff; Chesterfield (MO); On-site; USD 118,000 - 129,000; Full time

Job summary

HarveStaff LLC in Chesterfield, MO seeks a Senior General Designer (Mechanical) to lead mechanical design activities for capital projects across regional/global scopes. Develops safe, reliable, and constructible designs while mentoring junior designers and coordinating with vendors and engineers.

The role requires 10+ years of experience, strong CAD/3D skills, and the ability to guide cross-functional teams through design reviews, field verification, and installation support.

Qualifications

• Senior mechanical designer with lead role on capital projects.
• Experience with CAD/3D tools and vendor coordination.
• Ability to mentor designers and lead multi-site projects.
• Strong problem-solving and communication.

Responsibilities

• Serve as the mechanical design discipline lead for large and complex capital projects.
• Lead mechanical design activities and project closeout documentation in accordance with engineering execution and document-control requirements.
• Develop mechanical design packages, including 3D models, equipment arrangements, general arrangement drawings, fabrication and installation details, equipment supports, access platforms, and vendor-data integration.
• Provide technical guidance on 3D modeling, equipment layout, mechanical detailing, maintainability, and construction coordination.
• Develop mechanical designs that meet project, process, safety, operability, maintenance, reliability, and constructability requirements.
• Model and detail mechanical equipment and components, including connections, supports, guards, access provisions, lifting and removal clearances, and system interfaces.
• Provide technical oversight of equipment vendors, engineering consultants, design contractors, and fabrication or installation contractors.
• Support field verification, constructability reviews, installation, commissioning, checkout, and resolution of design-related field issues.
• Develop and maintain mechanical design standards, specifications, standard details, libraries, templates, and CAD/3D design tools.
• Communicate project scope, design decisions, risks, status, and technical issues to project teams, leadership, stakeholders, and site representatives.
• Coordinate mechanical design interfaces across disciplines and conduct design, model, interference, and clash-resolution reviews.
• Verify existing field conditions and incorporate site information, applicable codes and standards, vendor requirements, and project specifications into designs.
• Review and approve mechanical drawings and models for technical accuracy, completeness, consistency, and quality.
• Mentor less-experienced designers and promote consistent design practices and effective use of CAD/3D tools.
• Collaborate with engineers, designers, project managers, procurement, construction, commissioning, maintenance, operations, and safety teams.
• Interface with equipment vendors, fabricators, design consultants, EPCM firms, and construction contractors.

Skills

Mechanical design leadership

3D CAD modeling

Equipment layout

Codes & standards

Vendor coordination

Cross-functional teamwork

Mentoring designers

Interdisciplinary coordination

Field verification

Document interpretation

Education

Associate degree in Design

Bachelor’s degree in Engineering

Job description

HarveStaff LLC in Chesterfield, MO seeks a Senior General Designer (Mechanical) to lead mechanical design activities for capital projects across regional/global scopes. Develops safe, reliable, and constructible designs while mentoring junior designers and coordinating with vendors and engineers.

The role requires 10+ years of experience, strong CAD/3D skills, and the ability to guide cross-functional teams through design reviews, field verification, and installation support.