Orion Consulting Engineering & Design
We design the infrastructure that moves people.
Since 1995 we have prepared surveys, designs and detailed engineering for highway and railway authorities, municipalities and contractors in Türkiye and abroad.
About us
More than thirty years of transport and infrastructure engineering
Established in Ankara in 1995, Orion Consultancy has provided survey, design and engineering services to the transport and infrastructure sector ever since.
From route surveys to road and interchange design, from bridges and viaducts to tunnels and drainage structures, we support every stage of a project — together with geotechnical investigation, drainage and traffic design, technical assessment, reporting and construction supervision.
- Delivery within the committed schedule and budget
- Compliance with national and international design standards
- Long-standing relationships with public agencies, municipalities and contractors
Our services
Engineering at every stage of a project
From surveys to detailed design, from tender documents to construction supervision — across all disciplines of transport structures.
Road & Interchange Design
Route alignment, geometric design and detailed engineering for state and provincial roads, urban bypasses and grade-separated interchanges.
DetailsBridges & Viaducts
Design and detailed engineering of bridges and viaducts, including prestressed girder, balanced cantilever, steel composite and incrementally launched structures.
DetailsTunnels & Structures
Highway and railway tunnels, cut-and-cover structures, culverts, retaining walls and avalanche galleries.
DetailsRailways & Rail Systems
Alignment and structural design for conventional and high-speed railways, metro, light rail and tramway lines, with viaducts, underpasses and overpasses.
DetailsSurveys & Geotechnics
Geotechnical investigation and reporting, hydrological and hydraulic studies, drainage and traffic design.
DetailsPlanning, Management & Supervision
Master planning and traffic circulation studies; technical assessment, reporting, tender documentation and construction supervision.
DetailsSelected projects
Engineering you can see on the ground
From viaducts to mountain security roads, from high-speed rail to urban interchanges — a selection of projects that carry our signature.
Tohma Bridge
518 m long, 69 m spans · incrementally launched steel composite
View project
Çukurca – Dağlıca Road
117 km preliminary design · 7.7 km of tunnels
View project
Adapazarı – Istanbul High-Speed Railway
110 km line · 24 viaducts
View project
Düden and Sakarya Interchanges
2 grade-separated interchanges · tramway integration
View project
Güreşen Bridge
280 m · 135 m balanced cantilever span
View project
Balıkesir Ring Road & Junctions
Ring road, link roads and grade-separated junctions
View projectOrion at a glance
Project experience in 12 countries
From our office in Ankara we deliver engineering for transport projects across Europe, Central Asia, the Middle East and Africa.
- Türkiye
- Libya
- Iraq
- Gabon
- Azerbaijan
- Georgia
- Netherlands
- Kazakhstan
- Maldives
- Kuwait
- Romania
- Guinea
Who we work with
A trusted partner to the public and private sector
- General Directorate of Highways
- Turkish State Railways (TCDD)
- State Hydraulic Works (DSİ)
- Ankara Metropolitan Municipality
- Antalya Metropolitan Municipality
- Balıkesir Metropolitan Municipality
- Rönesans Holding
- Yüksel Proje
- Temelsu
- SWS Engineering
- Ballast Nedam
- UNICEF
Memberships
Your project
Let's work together on your next project
Tell us about your survey, design or consultancy needs and our team will get back to you shortly.
Contact form