Services that lead the way to better business.

Global Sustainability Assessment System
(GSAS) Service Provider
GSAS (D&B) Design & Build Certification

GSAS-D&B certification is applied to new building and infrastructure projects where the building (and/or infrastructure) is developed following a design that demonstrates high sustainability performance of the building in line with a level stipulated under this certification. The certification requires measurements of relevant parameters and aspects in accordance with accepted practices, considering the impacts the building can mitigate. The sustainability issues covered under this certification are related to categories of Urban Connectivity, Site, Energy, Water, Materials, Indoor Environment, Cultural & Economic Value and Management & Operations. This certification ensures that the building design and development meets the targeted level of sustainability performance.

GSAS Construction Management Certification

GSAS-CM certification program is applied to a project where the construction contractor follows the sustainable practices and processes. The certification requires measurements of relevant parameters and aspects in accordance with accepted practices, considering the impact that the construction project can mitigate. The sustainability issues covered under this certification are related to categories of Urban Considerations, Site, Energy, Water, Materials, Outdoor Environment, Socio-Cultural Dimensions and Management & Operations. This certification program ensures that the contractor’s practices and processes during the entire stage of the project construction phase meet the targeted level of sustainability performance. All types of project developments can be certified for their sustainability performance during construction using GSAS-CM Certification program

GSAS Operation Certification

GSAS-OP certification program can be applied to new or existing buildings where the tenant/ user has followed a high level of sustainability practice in building operations to: optimize energy consumption; optimize water consumption; minimize waste disposal and/or adopt sustainable waste treatment/disposal practices; and, maintain a healthy, productive and effective indoor environment. There are five categories in this certification including Energy, Water, Indoor Environment, Waste Management and Environmental Policy & Awareness. The certification requires information on computation or documentation that the project needs to submit to demonstrate compliance with the requisite parameters. The evaluation of the facility or tenant operations over the course of its lifetime is required, based on the repeated data collection for the whole year cycle. This certification ensures that the Energy, Water, Indoor Environment, Facility Management, Waste Management and Environmental Policy & Awareness performance of the building during the assessment period meet the targeted level of the sustainability standard.



Montreal Group LLC

Montreal Group LLC (previously named as Montreal Building Design Management Consultancy) is incorporated as limited liability company under the companies regulations in Qatar Financial Center (QFC Lic. No. 00983). As provided in the License Certificate, pursuant to its powers under Article 11(1) of the Qatar Financial Centre Law the Qatar Financial Centre Authority has granted Montreal Group LLC a License to carry on the sustainability scope of work. Montreal Group LLC is registered GSAS Service Provider (Global Sustainability Assessment System, Qatar) and a member of USGBC (United States Green Building Council) dedicated to provide customer satisfaction to various green building certifications under LEED Rating System (USA scheme) and GSAS System. (Qatar scheme) and Estidama Pearl Rating System (Abu Dhabi, UAE scheme).

Montriyal Engineering Consultancy

MONTRIYAL ENGINEERING CONSULTANCY is a highly regarded branch of our company based in the Philippines, with our main office situated in Doha, Qatar. Our primary focus is on delivering comprehensive sustainability, engineering, and architecture consultancy services. We pride ourselves on offering diverse solutions to help our clients achieve their goals. Our expertise spans various areas, including LEED (Leadership in Energy and Environmental Design) and sustainability consultancy, waste management, facility management, noise measurement, mechanical and electrical design, and environmental services. We are committed to providing top-notch services and working closely with our clients to meet their specific needs. With our dedicated team of professionals, we strive to deliver innovative and sustainable solutions for a wide range of projects.


Aref Aysha

Al Ali Engineering, GM

“As far as performance is concern, we are satisfied with their services.”

Hussam Diyab

Projects Control Manager, CCC TCC JV

“Montreal consultant has a well self-discipline and reliable team; committed to their task, very cooperative and we’re highly satisfied with their performance at Msheireb Down Town Phase 4 Project”

John Bouzoukos

Salfo & Associates, MEP Director

“All I can say is that Mr. Sonny Calma's company are meeting our expectations and we're glad to continue working with them in our future projects”

Mohamed Mahmoud

Project Manager, Alameiah Engg. Consultant

“Sonny Calma from Montreal Group is very professional, and he provided solutions to many challenges we faced at site construction.”

Anuran Wickramasinghe

Former Country Director in Qatar

“Sonny has attended to our requirements in a professional and timely manner. We have no hesitation in recommending him for LEED and GSAS work.”

Shehab Atallah

BOOM General Construction, Project Manager

“Working with them is the right decision as they are knowledgeable and willing to extend their services in meeting our required GSAS rating.”

Ronald Bong Nicdao

Project Manager, PAT Engineering

“Their overall performance is highly commendable in terms of managing the whole sustainability process all the way to certification. We look forward with great anticipation to acquire their services in future projects.”

Aushford Acera

Sr. QS/Engr. AAE

“In terms of their specialization, Montreal knows its work, no doubt, they will professionally complete the job successfully.”