Environmental leadership · Qatar & GCC

Engineering the systems
behind better cities.

Specialist environmental engineering, waste handling and mechanical solutions—built on two decades of delivery experience.

Explore our experience What we deliver
20+Years of experience
185Reference records
5Countries delivered
A vast portfolio of projectssuccessfully completed on time.

What we deliver

Diverse specialist capability.
One accountable partner.

From early strategy through installation, commissioning and support, our teams connect environmental intent with practical engineering.

01

Environmental engineering

Strategy, system planning and specialist delivery for high-performance places and infrastructure.

CONSULTANCY · DESIGN · DELIVERYDiscuss this capability
02

Waste & pneumatic systems

Pneumatic waste collection, refuse and linen chutes, treatment systems and lifecycle support.

PWC · CHUTES · TREATMENTDiscuss this capability
03

Mechanical solutions

Pumps, heat exchangers, ducting, exhaust and specialist mechanical packages.

EQUIPMENT · DUCTING · EXHAUSTDiscuss this capability

How we deliver

From coordinated design to dependable operation.

We connect strategy, detailed engineering, installation and commissioning so complex environmental and mechanical systems work as intended—on site and throughout their operating life.

FULLProject lifecycle
GCCRegional delivery
LOCALAccountability

Selected projects

Recognisable places.
Proven systems.

These landmark references demonstrate our experience across large residential districts, mixed-use destinations and city-scale infrastructure. The complete portfolio is organized by country, system and project type.

01
Lusail, Qatar

Lusail Marina District

Pneumatic waste collection & chute systems

View experience
03
The Pearl, Qatar

Porto Arabia & Viva Bahriya

Multi-parcel waste handling experience

View experience
Request the complete project portfolio

Our story

Twenty years in Doha. Built forward for Qatar and the GCC.

Contra Contracting & Trading carries forward the specialist capability, technical knowledge and market relationships developed through two decades of Contra International operations in Doha.

2005Operations established in Qatar
20 YEARSLandmark projects across Qatar and beyond
TODAYA renewed contracting platform for Qatar and the GCC
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Updates & insights

What we are building.
What we are learning.

Company developments, technical perspectives and selected material from more than two decades of environmental engineering and specialist systems delivery.

Company update · September 2026

A renewed platform for Qatar and the GCC

Contra Contracting & Trading carries forward twenty years of specialist capability, project knowledge and market relationships in Doha.

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Technical insight

Connecting design intent to dependable operation

Early coordination, specialist installation and lifecycle support are essential to making complex waste systems perform as designed.

Explore our capabilities
Project portfolio · September 2026

Landmark references across markets

Explore representative experience organized by country, system and project type—from major districts to specialist installations.

Download project portfolio

Start a conversation

Bring us the engineering challenge.

For project enquiries, capability presentations and technical discussions:

info@contraintl.com Doha, State of Qatar