Principal Mechanical Engineer

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QA - Doha
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Engineering/Engineering Support

Job Description:

The Principal Mechanical Engineer, you will provide the necessary technical leadership, mentoring and guidance to the mechanical staff in your operating groups.  You will ensure total quality of all engineering efforts and independently develops and/or supervises the creation of Mechanical engineering designs for large and mega infrastructure projects that meet customer quality requirements and international as well as Local Authority regulations and standards.  This includes defining the problem, establishing the work scope, preparing the budget and schedule, planning the work, providing technical direction, and reporting the work status.

What You'll Be Doing:

  • Engineering/design of major potable water, waste water and storm pumping stations
  • Engineering/design of water and industrial wastewater plants, Sewage treatment plants and RO Plants.
  • Carrying out Concept, preliminary and detailed engineering works related to process mechanical engineering such as developing process mechanical calculations.
  • Carryout design of odour control systems.
  • Carry out hydraulic calculations and hydraulic analysis modeling for sewage treatment plants and pumping stations.
  • Strong knowledge of Mechanical systems design for buildings such as HVAC, Plumping and Fire Fighting.
  • Knowledge of septicity analysis & its related studies.
  • Coordinate and obtain the data from suppliers as necessary to complete the process mechanical design for preliminary, biological and tertiary treatments for treatment plants.
  • Carry out process mechanical design for treatment plants and pumping stations to PWA standards and quality as and when assigned by the team lead.
  • Initiating and developing the detailed designs for process mechanical designs
  • Excellent report writing skills.
  • Preparing and generating spread sheets to carry out calculations.
  • Coordination with other Discipline Engineers as applicable.
  • Coordinate with BIM/CAD Technicians concerning project requirements and timelines.
  • Conducting client and project meetings as required by the project.
  • Ensure statutory and regulatory requirements are met in all designs.
  • Support the project submittals and No Objection Certificates (NOC) process to the relevant Authorities.
  • Allocating resources and time effectively
  • Stay updated with relevant technical developments within the discipline.
  • Understand the contract and scope of project deliverables.
  • Ensure that Health & Safety is embedded into all work practices in line with company policies.
  • Provide regular work status updates, including risks or concerns, to Seniors or MEP manager.
  • Attend and contribute in team and project meetings as required.
  • Complete accurate time sheets by set deadline.
  • Take on additional duties as assigned by management.

What Required Skills You'll Bring:

  • Bachelor’s degree in Mechanical Engineering or equivalent qualification.
  • At least 20+ years of overall experience.
  • Extensive experience in design development/
  • Advanced proficiency in relevant software including Watts for Septicity analysis (preferable), hydraulic modeling analysis, CFD, Surge Analysis etc.
  • Must have thorough knowledge of industry practices and regulations.
  • Excellent written and verbal communication skills.
  • Extensive experience in Doha/Qatar is mandatory.

Minimum Clearance Required to Start:

Not Applicable/None

Parsons is an equal opportunity employer committed to diversity in the workplace. Minority/Female/Disabled/Protected Veteran.

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We’re committed to delivering innovative infrastructure, defense and security solutions to enable a sustainable, safer, smarter and more connected world.


Founded in 1944, Parsons Corporation, a digitally enabled solutions provider, is focused on creating the future of the defense, intelligence, and critical infrastructure markets. From Earth to outer space, we deliver tomorrow’s solutions today. Equipped with the capabilities required to take on any defense, intelligence, or critical infrastructure challenge, our agile, innovative, and disruptive approach enables us to deliver solutions at the speed of relevance.

Our people are our greatest asset. We strive to be an employer of choice that engages employees in the community and creates rewarding career paths to cultivate a resilient workforce that is ready for the future.


Parsons has contributed to major infrastructure projects in Canada since the 1940’s, helping to design and build many well-known landscapes across the country, including the Regina Bypass, Turcot Exchange, Kicking Horse Canyon, Olivier-Charbonneau Bridge, and the Edmonton Light Rail Transit. Our markets are diverse, including Bridge, Tunnel, Road and Highway, Aviation, Rail and Transit, Smart Vehicle Solutions, Smart Mobility, Integrated Delivery, Environmental Remediation, Mining and Reclamation, and Water/Wastewater, as well as serving numerous industrial clients. The Parsons’ signature stands out and our achievements have been recognized via numerous awards for innovation and quality, particularly in long-span bridges, complex brigles, and major road networks expansions. Our teams work across Canada in many provinces, including Alberta, Ontario, Manitoba, British Columbia, Quebec, Saskatchewan, Northern Territories and the Yukon.

Parsons is an equal opportunity, drug-free employer committed to diversity in the workplace. Minority/Female/Disabled/Protected Veteran/LGBTQ+.

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4 Continents

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75+ Years

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17,000+ Employees

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80+ Languages


Financial Wellness

We care about your financial wellbeing. Parsons offers competitive pay and retirement plans to help you build wealth for the future while giving you the flexibility to diversify your investments.

Work Life Harmony

Balance in life is important and time away from the office is imperative to allow you to refresh and focus your attention on the things that matter to you. Parsons supports your time away by providing paid time off and paid flexible holidays.

Career Development

We are committed to fostering the personal and professional growth of our employees. Develop and advance yourself though our comprehensive training, educational and mentorship programs.

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We provide Industry leading benefits to support veterans and active-duty members to provide security for you and your family by offering robust leave and benefits; including paid active-duty military leave and paid time off when transitioning back to civilian life.

Mind & Body

At Parsons we inspire healthier habits, heathier minds, and a healthier you through our wellness program. Participate in our weekly Meditation Mondays and Wellness Wednesdays. Wellness, at Parsons, is more than just your annual checkup.


Health is not a one size fits all. At Parsons, we offer a robust Employee Assistance Program as well as comprehensive medical, dental and vision plans through large, national carriers with the choice of regional PPO, HDHP, or HMO networks.

Want to learn more about the benefits eligible for the Parsons’ location you are interested in? Connect with one of our recruiters for further detail.

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Parsons has a long-standing reputation as an industry leader in domestic and international engineering and construction projects. The company also has a solid history supporting federal government work.”

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