Sr. Mechanical Engineer

Job SummaryTDIndustries is seeking a highly technical Mechanical Engineer III or IV to support commercial construction projects during pre‑construction and construction phases. This role is ideal for an experienced consulting engineer or design build engineer who enjoys deep technical work, problem solving, and design excellence rather than formal people management. The engineer will serve as a subject‑matter expert across HVAC and plumbing systems, supporting a wide range of market sectors and project types.Essential DutiesDesign and analyze HVAC and plumbing systems for commercial, institutional, and industrial facilities from concept through construction.Provide technical engineering support during design‑build and design‑assist projects, including constructability reviews and technical recommendations.Perform advanced engineering calculations including heating and cooling loads, hydronics, plumbing fixture units, and energy analysis.Serve as a technical authority on code compliance (local, state, and national codes).Review architectural, structural, electrical, and civil drawings for impacts to mechanical systems and coordinate solutions.Develop and review construction documents, shop drawings, submittals, RFIs, and technical reports.Conduct site surveys and jobsite visits to verify compliance with approved design documents and resolve field issues.Support equipment selection and sizing in coordination with vendors and manufacturer representatives.Assist with preconstruction efforts including schematic designs, quantity take‑offs, and conceptual estimating.Troubleshoot system performance issues and develop alternative technical solutions as needed.Provide informal technical guidance and mentoring to designers or EITs (no direct people‑management requirement).Minimum RequirementsBachelor’s degree in Mechanical Engineering or related engineering discipline.Professional Engineer (PE) license required.Engineer III: Typically 7–10 years of mechanical engineering experience.Engineer IV: Typically 10–15+ years of mechanical engineering experience.Strong background working for a consulting or design build engineering firm with exposure to multiple market sectors.Deep technical knowledge of HVAC and plumbing system design, duct and pipe sizing, and system layout.Advanced proficiency in AutoCAD and Revit.Strong written and verbal communication skills with the ability to explain technical concepts clearly.Proficiency with Microsoft Office Suite.Preferred QualificationsExperience supporting construction operations in a design‑build environment.LEED, CEM, or CPD certification.Broad market experience (healthcare, higher education, commercial, industrial, etc.).Proven ability to work independently and solve complex technical challenges.Role FocusPrimarily technical / individual contributor role.Limited emphasis on people management; mentoring is informal and technical in nature.Level (III vs IV) will be determined based on depth of experience, technical expertise, and business need.Grow Your Career with TDIndustriesFounded in 1946, TDIndustries is a premier, employee-owned Mechanical, Electrical, and Plumbing (MEP) company delivering full-lifecycle building solutions—from design and construction to service and facilities maintenance. We power critical environments like hospitals, schools, data centers, stadiums, and commercial buildings across Texas and the Southwest.Our Partners (employees) are the core of our success. As an employee-owned company, you have a voice, a stake, and a clear path to grow. Recognized by FORTUNE Magazine as a "100 Best Company to Work For," we invest in top training, career development, and a culture built on trust and servant leadership.Join a growing team where your skills matter, and your future is built to last.At TDIndustries, we believe opportunity should be built — and shared — by all. Whether you work with tools or technology, in the field or the office, we hire and grow people based on skill, potential, and integrity — never labels. We value the diverse paths that bring people to our team and welcome Partners of all backgrounds, including differences in race, color, religion, sex, gender identity or expression, sexual orientation, age, ability, military service, and more. What matters most is how we work together to build excellence.