Senior Mechanical Engineer

iENG Design Opportunity:
Senior Mechanical Engineer

iENG Design is seeking a qualified professional to join our Engineering team. iENG’s method of engineering is unique:
We begin with the end in mind and challenge everything. We take time to understand the project we want to deliver, the owner's views, use of building, and the owner's operation and maintenance capabilities. We look at first cost versus operation cost versus life cycle cost. Every iENG project has a best value and best design—and that is what we deliver.

An IMI Company, iENG serves nationwide Fortune 500 clients across the Institutional, Commercial and Industrial markets. IMI Companies also include Icon Mechanical, Eagle Controls, and iSuite.

iENG Design is headquartered in Chesterfield, MO and has branch offices in Granite City, IL;
Nashville, TN; and Charlotte, NC. Services & Capabilities include:
Engineering & Design, VDC/BIM Coordination, Construction Support, Scheduling, Commissioning, Retro Commissioning, and Inspection Services.

We are currently looking for a Senior Mechanical Engineer to join our Engineering team located at our office in Granite City, IL
. Our ideal candidate is someone who has 8+ years of experience as a Mechanical Design‑Build Engineer or in a similar role, a self‑starter with a strong sense of leadership, direction, and commitment to our projects.

• Leading mechanical design and implementation projects, ensuring timelines, budgets, and quality standards are met.
• Designing, specifying, and selecting mechanical systems and components, considering energy efficiency, cost, and regulatory compliance.
• Performing load calculations, airflow analyses, and other technical assessments to inform system sizing and design.
• Ensuring all designs meet relevant local and international codes, standards, and safety regulations, including ASHRAE, LEED, and NFPA standards.
• Preparing and reviewing technical documents, including design drawings, specifications, equipment selections and submittals, and cost estimates.
• Overseeing installation, testing, commissioning, and troubleshooting of HVAC systems to ensure quality and functionality.
• Providing technical guidance and mentorship to junior engineers and project teams.
• Collaborating with clients and owners to understand project requirements and provide technical support and recommendations.

• Bachelor's degree in Mechanical Engineering or a related accredited engineering discipline.
• 8+ years of relevant mechanical engineering design or design‑build experience focused on HVAC and piping systems; plumbing knowledge is a plus.
• Professional Engineer (PE) license is preferred.
• LEED Accreditation is a plus.
• Proficiency in HVAC design software (e.g., AutoCAD, Revit, Trane Trace, Carrier HAP) and building management systems (BMS).
• Excellent communication and interpersonal skills, with the ability to work effectively with clients, contractors, and internal and external teams.
• Proven experience in mentoring junior engineers and guiding teams to success.
• Strong work ethic and ability to work well both in a team and independently with minimal supervision.
• Ability to maintain attention to detail under multiple deadlines and duties.

• Employee Stock Ownership Program
• Experience‑based salary
• Discretionary Annual Bonus
• Health Insurance
• Vision Insurance
• 401(k) with discretionary company contributions
• Paid Time Off (Vacation; Sick Time)
• Paid Company Holidays
• Tuition Reimbursement Program
• Employee Assistance Program

Our commitment to diversity and inclusion starts with us. The IMI companies strive to build a team that is truly reflective of the communities we serve in every level of our business. We know that when diverse minds and perspectives come together, the possibilities are limitless.

In compliance with Federal and State equal employment opportunity laws, qualified applicants are considered for all positions without regard to race, color, religion, sex, national origin, age, marital status, veteran status, non‑job‑related disability, or any other protected group status. EOE/M/F/V/D.