Sr. Mechanical Engineer - Semi Conductor

BW Water•Phoenix, AZ

3d•Onsite

About The Position

The Senior Mechanical Engineer – Semi Conductor is responsible for mechanical engineering design and technical execution for a new semiconductor facility in Arizona. The role focuses on mechanical systems and equipment associated with UPW, WWTP, ZLD, utilities, and process support systems. This position leads mechanical design activities from concept through construction, supports procurement, fabrication, installation, and commissioning, and collaborates closely with process, electrical, I&C, civil, structural, vendors, and construction teams. Extensive experience in mechanical systems for water/wastewater and EPC projects is required. The Senior Mechanical Engineer reports to the Engineering Manager and acts as a key technical authority for mechanical design deliverables.

Requirements

Bachelor’s or Master’s degree in Mechanical Engineering
10+ years of mechanical engineering experience, preferably within EPC projects
Water/wastewater industry experience strongly preferred
Strong experience with piping systems, rotating equipment, and mechanical utilities
Experience supporting construction and commissioning phases

Nice To Haves

EPC project execution mindset
Strong cross-discipline coordination skills
Clear technical communication with clients, vendors, and construction teams
Ability to work in fast-paced, schedule-driven environments
High attention to safety, quality, and regulatory compliance
Ability to work on-site in Arizona as required during different project phases

Responsibilities

Lead mechanical engineering design development for a new build semiconductor plant, including UPW, WWTP, ZLD, and utility systems.
Develop and review mechanical layouts and equipment arrangement drawings.
Develop and review piping design, isometrics, and pipe specifications.
Develop and review equipment selection and prepare data sheets (valves, pumps, air-blowers, tanks, cartridge filters, heat exchangers, filters, skids, etc.).
Develop and review material selection and corrosion allowances.
Perform mechanical calculations (pipe sizing, pipe stress, friction losses, equipment sizing, equipment static and dynamic calculations, atmospheric tank calculation, pressurized vessels calculation).
Review equipment design and calculations provided by equipment suppliers and subcontractors.
Ensure mechanical designs comply with owner & contract specifications and applicable US codes and standards (ASME, ANSI, ASTM, API, AWWA, etc.).
Interface with process, electrical, I&C, and civil disciplines to ensure fully integrated design.
Support vendor technical evaluations, bid reviews, and equipment selection from a mechanical perspective.
Review vendor drawings and data sheets for compliance with specifications.
Provide technical input during procurement, fabrication, and FAT activities.
Support constructability reviews, installation sequencing, and field engineering activities.
Participate in HAZOP, safety, and design reviews.
Provide mechanical engineering support during construction, including responses to RFIs and evaluation of field changes.
Support for redline markups and as-built documentation.
Perform mechanical system walkdowns and punch list resolution.
Support system turnover, commissioning, and start-up activities.
Act as a mechanical technical authority for UPW, WWTP, ZLD, and utility systems.
Mentor junior mechanical engineers and review their deliverables.
Coordinate with client engineering teams, vendors, and fab operations stakeholders.
Cooperate closely with senior engineers for Process and Electrical, I&C and Civil disciplines.
Report progress, risks, and technical issues to the Engineering Manager.