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Transportation Engineering
- Geometric & alignment design
- Pavement analysis & rehabilitation
- Intersection & interchange design
- Integrated stormwater drainage
- Traffic impact assessments
ECSA Registered • Est. 1998
We build the roads that connect South Africa.
Civil & structural engineering consultancy delivering national-scale infrastructure across every province.
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Years in Practice
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Provincial Offices
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Active Project Value (ZAR)
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Projects Delivered
Who We Are
Engineering excellence.
Engineering excellence.
Operational discipline.
Quantra Consulting Engineers was established in 1998 and has operated as a fully independent civil engineering practice since 2006. Headquartered in Mossel Bay with regional offices in Jeffreys Bay, Durban, and Pretoria, the firm serves both public and private sector clients across all nine provinces.
Led by Carel Kuun Pr.Eng. — a registered Professional Engineer with over three decades of infrastructure experience — the practice is built on technical rigour, disciplined execution, and an unwavering commitment to quality. Our multidisciplinary team brings specialist capability in transportation design, stormwater engineering, structural analysis, contract administration, and construction supervision.
We hold an extensive track record of delivering infrastructure for SANRAL, provincial road authorities, and major local municipalities. From concept through construction, we engineer infrastructure that performs.
What We Do
Core Engineering
Core Engineering
Disciplines
Full-spectrum civil engineering capability from feasibility assessment through project close-out.
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Municipal Infrastructure
- Potable water reticulation
- Sanitation network design
- Stormwater management systems
- Bulk services planning
- Township development services
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Project & Contract Management
- GCC & FIDIC contract administration
- Programme & cost management
- Construction supervision
- Quality assurance & compliance
- Claims & variation management
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Structural Engineering
- Reinforced concrete design
- Structural steelwork design
- Bridge & culvert analysis
- Residential & commercial structures
- Slope stabilisation engineering
Our Work
Project Portfolio
Select active and completed engagements demonstrating our capability at national scale.
R10bn
N11 Ermelo Ring Road — Greenfield Alignment
Greenfield ring road around Ermelo including 5 new multilevel interchanges. Joint venture with SNA (70/30%).
SANRALRoadsR3.2bn
N2 Edwin Swales to EB Cloete — Capacity Improvements
Capacity upgrade of roads and new high-speed flyover bridges at Edwin Swales Interchange, N2 Section 25 (km 11.80–16.00). Joint venture with SNA (70/30%).
SANRALRoadsR1.7bn
N2 Ibeka to Tetyana — Special Maintenance
Geometric upgrade, capacity upgrade, and structural upgrade on N2 Section 17 (km 44.0) to Section 18 (km 24.0). Joint venture with SNA (70/30%).
SANRALRoadsR1.3bn
R52 Koster to Rustenburg — Section 3
Geometric upgrade, capacity upgrade, and structural upgrade over 38.7 km of the R52 national road. Joint venture with SNA (70/30%).
SANRALRoadsR1.2bn
N2 Dutywa Ring Road — Sections 17 & 18
Greenfield ring road around Dutywa with 3 new multilevel interchanges. Joint venture with SNA (70/30%).
SANRALRoadsR1.2bn
R37 Lydenburg to Sabie — Section 3
Capacity upgrade of Long Tom Pass over 43.49 km through the Mpumalanga escarpment. Joint venture with SNA (70/30%).
SANRALRoadsR1.1bn
N2 Swartklip to Baden Powell Interchange
Capacity upgrade from 4-lane to 6-lane dual carriageway on N2 Section 1 (km 17.47–29.00). Joint venture with SNA (70/30%).
SANRALRoadsR330m
Slope Stabilisation — N10, R63 & R390
Slope stabilisation of 3 cuttings in the Eastern Cape near Cradock: Witkrans Nek (N10), Ouberg Pass (R63), and Cradock cutting (R390). Joint venture with SNA (70/30%).
SANRALRoadsR300m
M7 Solomon Mahlangu Drive Upgrade
Capacity upgrade of M7 from 6-lane to 8-lane dual carriageway highway (2.2 km) from M10 (Vusi Mzimela) to Titren Road.
eThekwini / SANRALRoadsR100m
N2 Riversdale to Dekriet — Repair & Reseal
Periodic maintenance reseal on N2 Section 6 from Riversdale (km 0.0) to Dekriet (km 25.4).
SANRALRoadsR30m
Bergrivier Municipal Roads — Kerk Laan & Abattoir Street
Reconstruction of Kerk Laan and upgrade of Abattoir Street in the Bergrivier Municipal Area.
Bergrivier MunicipalityRoadsR10m
Kouga Region — Emergency Flood Damage Reinstatement
Design and implementation of emergency repairs to various roads and stormwater structures in the Kouga region.
Kouga MunicipalityRoadsR1.5m
Bergrivier — Theron Street Upgrade, Porterville
Upgrade of Theron Street in Porterville under the 3-year Bergrivier municipal appointment.
Bergrivier MunicipalityRoadsR58.7m
Western Cape Education Infrastructure — Secondary Schools
Construction of Bastiaanse Secondary School MOD Centre and Imizamo Yethu Secondary School MOD Centre.
WC GovernmentCivilR30m
Knysna Housing — Low-Cost Housing
Construction of low-cost housing units for the Knysna Municipality.
Knysna MunicipalityCivilR18m
Sedgefield Infill — Civil Engineering Services
Sedgefield housing project: 230 serviced stands and 150 housing units with full civil services.
Knysna MunicipalityCivilR5.1m
Midbrak Main Sewer Network Upgrade
Upgrade of the Midbrak main sewer network to address capacity constraints.
Mossel Bay MunicipalityWaterR1.8m
Brandwacht Sewer Network Upgrade
Upgrade of existing sewer network to address capacity issues in Brandwacht.
Mossel Bay MunicipalityWaterR1.6m
Hartenbos Heuwels Booster Pump Station Upgrade
Upgrade of the Hartenbos Heuwels booster pump station.
Mossel Bay MunicipalityWaterR1.5m
Bartelsfontein New Sewer Network
Construction of new sewer network in Bartelsfontein.
Mossel Bay MunicipalityWaterR600k
Brenton-on-Lake to Belvedere Bulk Sewer Link
Construction of 3,700 m sewer pipeline between Brenton-on-Lake and Belvedere with related infrastructure.
Knysna MunicipalityWaterR333m
R511 Beestekraal to Limpopo Border — Partial Reconstruction
Capacity upgrade and detail design for the partial reconstruction of R511 Section 3 (km 36–78). 20% targeted enterprise with SNA.
SANRAL2020R220m
N17 Section 5 — Pavement Restoration to Oshoek
Periodic maintenance and surfacing from km 85 to Oshoek (km 122.7). 20% targeted enterprise with SNA. Detail design.
SANRAL2020R109m
Mbombela (Nelspruit) — Streets, Bus Routes & N4 Interchange
12 streets and bus routes in Matsulu, N4 interchange upgrade, and streets in Kanyamazane, Shabalala, Legogote, and Clau-Clau.
Mbombela Municipality2016R66m
Nkangala District — Various Roads & Bus Routes
Multiple phases of roads and bus routes across Emalahleni, Kwaggafontein, Sun City, Tweefontein, Mandela, Phola Park, Delmas, and Verana.
Nkangala District Municipality2017R56m
Saville to Dixie — 11 km Gravel Road Upgrade
Upgrade of 11 km gravel road to surfaced standard in Bushbuckridge LM. Detail design completed (project halted due to client financial constraints).
Rural Development2017R54m
R37 Burgersfort — Section 2 Resurfacing
Periodic maintenance patch and reseal on the R37 from Burgersfort km 0.0 to km 14.0.
SANRAL2022R54m
George Municipality — Stormwater & Road Upgrades
Stormwater upgrades in Thembalethu/Pacaltsdorp and upgrade of Peters Road in Wilderness under 3-year appointment.
George Municipality2022R34.2m
Cape Agulhas — Roads Programme
Road D319 (L'Agulhas to Suiderstrand), paving of sidewalks in L'Agulhas, and internal streets in Bredasdorp across two 3-year appointments.
Cape Agulhas Municipality2022R23m
Thembisile Hani — Bus Routes
Bus routes in Tweefontein B2, Langkloof, Mzimuhle, and Tweefontein E–Machipe.
Thembisile Hani Municipality2015R20.5m
Beaufort West — Various Street Upgrades (2013–2019)
Two 3-year appointments covering street upgrades across Beaufort West, Nelspoort, Murraysburg, and Merweville.
Beaufort West Municipality2020R18m
Knysna — Grey Street Upgrade
Roads, stormwater, water, and sewer infrastructure upgrade on Grey Street.
Knysna Municipality2022R15m
Zweletemba, Worcester — Gravel Road Surfacing
Upgrading of gravel roads to surfaced standard at Zweletemba, Worcester.
Worcester Municipality2024R10.1m
Emalahleni — Bus Route, Kwa Guqa X11
Construction of roads and stormwater for a bus route in Kwa Guqa X11, Witbank.
Emalahleni Municipality2021R10.9m
Emalahleni — Bus Routes, Hlalanikahle & Kwa Guqa X9
Construction of bus routes in Hlalanikahle and Kwa Guqa X9.
Emalahleni Municipality2017R10m
Oudtshoorn — Stormwater Upgrades
Stormwater upgrades in greater Oudtshoorn area under 3-year civil engineering services appointment.
Oudtshoorn Municipality2022R56m
Zambia — Mwambashi Access Roads (Chingola & Kitwe)
Design of 12 km new greenfield access roads to link new mine to Chingola and Kitwe.
TEAL Mining2007R50m
Ebuhleni Primary School — Full Construction
Classrooms, computer centre, library, laboratory, 28 toilets, school hall, reservoir, pump house, water & sewer reticulation, 3 sports fields, roads, and fencing.
Mpumalanga DPW2021R17m
Gedlembane Secondary School — Full Construction
Classrooms, computer centre, library, laboratory, toilets, school hall, reservoir, water & sewer reticulation, sports fields, roads, and fencing.
Mpumalanga DPW2015R16m
Acorn to Oaks Secondary School
Construction of new secondary school funded by the Vodacom Foundation.
Vodacom Foundation2013R12m
Mbombela Prison — Upgrade & Rehabilitation
Upgrade and rehabilitation of the existing Mbombela prison complex.
Dept of Public Works2013R12m
Khetsalwati Secondary School
Classrooms, computer centre, 28 toilets, school hall, reservoir, pump house, water & sewer reticulation, 3 sports fields, car park, and fencing.
Mpumalanga DPW2013R11m
White River Primary School — Upgrade & Construction
Construction of 8 classrooms, new water & sewer reticulation, paving, and palisade fencing.
Mpumalanga DPW2013R2.5m
Capital Construction — Residential Property Development
Development of residential property including structural design and civil services.
Private2024R1.75m
Billboard Structural Design — Multiple Locations
Structural design and supervision of 40 m² billboards at CBS, Pinnacle Point, and Hartenbos.
Various2023R17.9m
Cape Agulhas — Civil Services & Sewer
Industrial site development (all civil services), Struisbaai sewer, and Bloekom Street water under 3-year appointment.
Cape Agulhas Municipality2022R8.6m
Oudtshoorn — Water & Sewer Infrastructure
Water and sewer infrastructure under the 3-year civil engineering services appointment for the greater Oudtshoorn area.
Oudtshoorn Municipality2022
Our People
Professional Team
Matimba Nkatini
Director
N.Dip (Building), B.Tech (QS)
SACQSP Member IT3581
Carel Kuun Pr.Eng.
Project Director
B.Eng. (Civil)
ECSA, SAICE, CESA, SARF
Marike Botha Pr.Eng.
Design Engineer
B.Eng. (Civil)
ECSA Pr.Eng.
Jahnerik Fourie
Design Engineer
B.Eng. (Civil)
ECSA
Niel Oosthuizen
Design Engineer
M.Eng. (Civil)
ECSA Candidate
Erik Barnardt
Resident Engineer
M.Eng. (Civil)
ECSA Candidate
Israel Maphanga
Resident Engineer
B.Eng. (Civil)
ECSA Candidate
Wilhelm Kuun
Drone Pilot
Remote Pilot Licence
SACAA
Carina Kuun
Director: Finance
B.Compt. (Acc)
Carlissa Kuun
Financial Manager
B.Com. Man.Acc.
Network
Partners & Clients
Strategic Partners
Select Clients
Common Questions
Frequently Asked Questions
What engineering services does Quantra Consulting offer?
Quantra Consulting Engineers provides four core disciplines: transportation engineering (geometric design, pavement rehabilitation, stormwater drainage), municipal infrastructure (water reticulation, sanitation, stormwater management), project and contract management (GCC and FIDIC administration, construction supervision), and structural engineering (reinforced concrete, structural steelwork, slope stabilisation). We deliver full-lifecycle services from feasibility through project close-out.
Where are Quantra Consulting's offices located?
Our headquarters are in Mossel Bay, Western Cape (Unit 10 Diaz Office Park, Beach Boulevard, Voorbaai). We have regional offices in Pretoria (Gauteng), Durban (KwaZulu-Natal), and Jeffreys Bay (Eastern Cape). This nationwide presence allows us to service projects across all nine South African provinces.
Does Quantra work on SANRAL national road projects?
Yes. SANRAL is our largest client. We currently hold appointments on over 10 active SANRAL projects with a combined value exceeding R21 billion, including the N11 Ermelo Ring Road (R10bn), N2 Edwin Swales capacity upgrade (R3.2bn), and N2 Ibeka to Tetyana special maintenance (R1.7bn). Several of these are delivered through a joint venture with SNA Civil & Structural Engineers.
How long has Quantra Consulting been in operation?
Quantra was established in 1998 as a specialist sub-consultancy and has operated as a fully independent civil engineering practice since 2006. Our Project Director, Carel Kuun Pr.Eng., brings over 30 years of infrastructure engineering experience. The firm is registered with ECSA, SAICE, CESA, and SARF.
What types of municipal projects does Quantra handle?
We deliver a wide range of municipal projects including road construction and surfacing, stormwater upgrades, sewer network construction and upgrades, water reticulation, pump station upgrades, housing development civil services, and emergency flood damage reinstatement. Our municipal clients include Mossel Bay, Knysna, Bergrivier, Kouga, Oudtshoorn, Beaufort West, George, and Cape Agulhas municipalities, among others.
Get in Touch
Let’s discuss
Let’s discuss
your next project.
Whether you require feasibility assessment, detailed design, or construction supervision — our team is ready to deliver.