Senior Mechanical Engineer - Building Services

Worley; Doha; On-site; QAR 167,400 - 223,200; Full time

Job summary

Worley is seeking a highly experienced Building Services Engineer in Doha to support the delivery of engineering projects. You will lead the design and development of fire protection systems and plumbing solutions while ensuring compliance with local standards and regulations.

The ideal candidate holds a Bachelor’s degree in Mechanical Engineering and MME accreditation, with advanced skills in fire protection and drainage systems. This role offers an opportunity to engage in impactful projects in a vibrant work environment.

Qualifications

• Full-time Bachelor's degree in Mechanical Engineering from an accredited university.
• MME engineering accreditation – mandatory for candidates.
• Chartered Professional Engineer (CPEng) status or pursuing it will be an advantage.

Responsibilities

• Support the design and delivery of building services across projects.
• Lead development of cost-effective engineering solutions.
• Design fire protection and plumbing systems.

Skills

Fire protection systems design

Hydraulic calculations

Plumbing systems design

Drainage systems coordination

Education

Bachelor’s degree in Mechanical Engineering

MME engineering accreditation

Job description

Building on our past. Ready for the future

Worley is a global professional services company of energy, chemicals and resources experts. We partner with customers to deliver projects and create value over the life of their assets. We’re bridging two worlds, moving towards more sustainable energy sources, while helping to provide the energy, chemicals and resources needed now.

Key Responsibilities

• Support the design and delivery of building services across industrial and infrastructure projects.
• Lead the development of safe, compliant, and cost‑effective engineering solutions in accordance with international standards such as NFPA, ASHRAE, and local regulations.

Engineering Design & Technical

• Lead the design and development of:
  • Fire protection systems (hydrants, sprinklers, foam, clean agent systems)
  • Domestic water supply systems (potable and non‑potable)
  • Drainage systems (sanitary, stormwater, oily water, condensate)
• Perform system calculations, including:
  • Firewater demand and hydraulic calculations
  • Pipe sizing and system design optimization
• Prepare engineering deliverables:
  • Design basis reports, calculations, and specifications
  • System schematics, layouts, and detailed drawings
  • Equipment datasheets and technical documentation

Fire Protection Engineering

• Design and review:
  • Firewater networks (pumps, storage, distribution)
  • Sprinkler, water spray, hydrant and hose reel systems
• Ensure compliance with NFPA standards and local civil defense requirements.
• Develop fire protection philosophies, layouts and system calculations.

Plumbing & Drainage Systems

• Design complete plumbing systems, including:
  • Domestic cold and hot water systems
  • Utility water supply for maintenance and operational use
• Design and coordinate drainage systems:
  • Sanitary drainage
  • Stormwater systems and discharge arrangements
• Interface with external utilities for water supply and drainage tie‑ins.

Education – Qualifications, Accreditation, Training

• Full‑time Bachelor’s degree in Mechanical Engineering from an accredited university.
• MME (Ministry of Municipality and Environment) engineering accreditation – mandatory. Candidates not holding this accreditation must be willing to achieve it within the probationary period.
• Chartered Professional Engineer (CPEng) status or undertaking the same will be an advantage.

Industry Specific Experience

• Highly experienced senior Building Services Engineer specializing in fire protection, water supply and drainage systems to support the design and delivery of building services across industrial and infrastructure projects.
• Engineering experience in the same or similar industry, including multi‑disciplinary projects and teams.
• Good knowledge of discipline design/engineering with sufficient experience in different discipline areas.

We provide equal employment opportunities to all qualified applicants and employees without regard to age, race, creed, color, religion, sex, national origin, ancestry, disability status, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, citizenship status or any other basis as protected by law.