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Posted 15 August, 2026

Senior Mechanical Design Engineer

W3Global Inc.
Saint Joseph, MO, US Full Time

Job Description

Job Description

Senior Mechanical Design Engineer - Construction

We are seeking an experienced Senior Mechanical Design Engineer to support the design and planning of large, complex construction projects (HVAC/plumbing/piping). This role is well suited for a technical leader who enjoys coordinating across teams, solving design challenges, and ensuring projects are developed with quality, accuracy, and constructability in mind.

Role Overview

In this position, you will contribute to multiple phases of project development, from early design through closeout. You'll work closely with internal operations teams, project stakeholders, and other engineers to help develop scopes, review design progress, guide technical decisions, and support successful project delivery.

Key Responsibilities

  • Lead peer review of design progress and coordinate with operations on design and cost-related matters.

  • Support development of scopes of work, schematic budgets, and engineering-only estimates.

  • Collaborate with team members to align project goals and design direction.

  • Lead internal commissioning efforts and help incorporate commissioning requirements early in the design process.

  • Perform and oversee system design for mechanical and plumbing/piping systems.

  • Select and size equipment, ductwork, and piping, and develop specifications and sequences of operation.

  • Perform load calculations and compliance checks to ensure technical accuracy and code adherence.

  • Maintain project documentation, calculation reports, and release packages.

  • Develop design sketches and support or supervise modeling efforts.

  • Participate in field walk-throughs, punch list creation, and project closeout activities.

  • Update design documents to reflect as-built conditions.

  • Mentor junior engineers and support knowledge-sharing within the team.

Qualifications

  • 10+ years of design engineering experience.

  • Bachelor's degree in Mechanical Engineering, Electrical Engineering, Construction Engineering, or a related field.

  • Professional Engineer license preferred.

  • Experience in industrial or manufacturing design is a plus.

  • Occasional travel required.

Benefits

This opportunity includes a strong benefits package with paid holidays, paid vacation, health/dental/vision coverage, 401(k) with company match and profit sharing, tuition reimbursement, wellness support, and ongoing advancement opportunities.

\nCompany Description

W3Global was established in 2006 in Fremont, CA with a vision: simplify the recruiting process and develop an industry-disrupting platform to connect candidates with clients. Our cutting-edge Applicant Tracking System enables us to find the right person for the right job, creating value for job seekers and employers. While W3Global initially focused on IT staffing, we have expanded the business to serve many other industries, including accounting and finance, legal, engineering, human resources, government and more.

We’re proud of the investments we’ve made in our team, having grown from four to 1000 employees and evolving into one of the leading recruitment and staffing solution providers in the industry. Our recruiters and account managers are passionate about connecting qualified professionals with the right positions in small, medium, and large companies.

Our Services
W3Global understands the natural ups and downs of an organization’s staffing needs. We are continuously adapting to industry and economic changes to find the right candidates.

We specialize in placing permanent, direct, contract, and temporary positions for companies of any size. Our recruiting services include sourcing, recruiting, screening, interview management, salary negotiations, training, and onboarding.

We are committed to helping organizations redefine their recruitment process by delivering our SaaS-based proprietary application tracking system software.

Our Expertise
W3Global has been delivering staffing solutions for nearly two decades; we know which recruiting strategies work best. Our expert team is committed to developing a customized solution to fit your company’s unique needs.

As a W3Global client, you’ll also receive personalized assistance from a seasoned team of staffing specialists. We are committed to providing both technical support and industry expertise to simplify the hiring process. We know that your time matters. W3Global will help you streamline the hiring process, getting it done and getting it right.