Senior Mechanical Engineer - Infrastructure & Tunnels

Parsons; Riyadh; On-site; SAR 246,000 - 391,000; Full time

Job summary

Parsons in Riyadh, Saudi Arabia, is seeking a Mechanical Engineer for infrastructure design to lead complex concept and detailed-design activities for mechanical systems serving tunnels and infrastructure. The role covers tunnel ventilation, HVAC, plumbing, chilled-water, and pumping systems, and requires reviewing third-party designs and guiding junior engineers in a high-stakes PMO context. The position is full-time with a strong senior focus.

Qualifications

• Bachelor's degree in Mechanical Engineering.
• 15 years of relevant mechanical-design experience.
• Strong background in concept and detailed engineering.
• Experience with tunnel ventilation, HVAC, plumbing, chilled-water, and pumping systems.
• Ability to perform pipe-sizing and pump-head calculations.
• Experience reviewing third-party designs and coordinating approval comments.
• Proven ability to prepare specifications, data sheets, drawings, and technical reports.
• Experience evaluating supplier submissions and technical bids.
• Strong understanding of multidisciplinary design coordination.
• Ability to guide designers, drafters, and junior engineers.
• Experience in a project-management office is preferred.

Responsibilities

• Perform concept and detailed-design engineering for infrastructure mechanical systems.
• Extract and interpret engineering information from CAD drawings and coordinated models.
• Develop tunnel-ventilation system designs and associated technical calculations.
• Design HVAC systems for tunnel, utility, operational, and supporting facilities.
• Prepare plumbing layouts, schematics, calculations, and equipment requirements.
• Complete pipe-sizing calculations for water and mechanical-service networks.
• Calculate pump heads for primary, secondary, and distribution chilled-water systems.
• Develop technical requirements for condenser-water systems.
• Design side-stream filtration arrangements and booster-pump systems.
• Prepare coordinated drawings, calculations, schedules, specifications, and design reports.
• Produce documentation suitable for tendering, procurement, construction, and commissioning.
• Develop and issue equipment specifications and technical data sheets.
• Coordinate mechanical designs with civil, structural, electrical, fire-safety, and other engineering disciplines.
• Resolve spatial, technical, and operational interfaces affecting mechanical systems.
• Review third-party designs and consolidate technical comments for approval.
• Assess supplier drawings, equipment selections, and material submissions.
• Perform technical analyses of contractor and supplier bids.
• Verify compliance with project requirements, engineering standards, and approved design criteria.
• Provide technical direction to CAD designers, drafters, junior engineers, and other project-team members.
• Review work produced by less-experienced personnel for accuracy and consistency.
• Support multidisciplinary teams where mechanical input is required.
• Advise senior management on significant mechanical-engineering matters.
• Manage major technical assignments or project work packages when required.
• Maintain design records and support the closure of technical comments.
• Perform other engineering responsibilities assigned by project leadership.

Skills

Mechanical infrastructure design

Tunnel ventilation

Education

Bachelor's degree in Mechanical Engineering

Job description

Parsons in Riyadh, Saudi Arabia, is seeking a Mechanical Engineer for infrastructure design to lead complex concept and detailed-design activities for mechanical systems serving tunnels and infrastructure. The role covers tunnel ventilation, HVAC, plumbing, chilled-water, and pumping systems, and requires reviewing third-party designs and guiding junior engineers in a high-stakes PMO context. The position is full-time with a strong senior focus.