Est. 1994 Civil and Structural Engineering

Excellence through professional engineering.

An international civil and structural engineering firm delivering design and construction monitoring through technologically superior processes, comprehensive subcontracting protocols and enhanced construction methodologies.

1994
Established
0
Countries of operation
0
Years combined experience
0
Bridges and culverts inspected
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Aerial / Flagship Aerial view of the Mbudzi Interchange in Harare, a grade separated cloverleaf interchange with loop and ramp roadworks
Mbudzi InterchangeHarare, Zimbabwe / Commissioned 2025
01 / About the firm

Engineering that
stands up to scrutiny.

A close corporation registered in South Africa, operating since 1997. Consultancy alone, or full design and build turnkey delivery.

DNMZ International provides design and construction monitoring to local and provincial government, renewal projects, structural and civil works, roads and storm water infrastructure, bulk services, water and sewage.

Owned and managed by suitably qualified members, our leadership collectively holds more than five decades of civil engineering experience. We favour employment intensive construction methods, pairing technically superior processes with comprehensive subcontracting protocols.

From concept planning through to completion, we work across four countries with a highly skilled professional team of internal and external strategic business alliances.

Structural modelWarren truss node A completed road bridge by DNMZ International Live wireframe

Vision

Build a consultancy firm that will deliver good quality engineering services and that will grow to compete with large engineering companies in South Africa.

Mission

Provide clients with top quality professional engineering services for construction and related activities, both public and private, from concept planning through to completion, with a highly skilled professional team. Recognised for design and implementation excellence, committed to sustainable development, adding value through innovation and cost effective service delivery.

02 / Capabilities

Four disciplines,
one standard.

Consultancy alone or full design and build turnkey delivery, favouring employment intensive construction methods.

01

Structural
EngineeringConcrete and steel

  • Reinforced and prestressed concrete
  • Commercial and industrial buildings
  • Masonry
  • Bridges
  • Water retaining structures
  • Low cost housing
02

Project
ManagementDelivery and contracts

  • Project management
  • Contract administration
  • Tender documentation
  • Management of labour intensive contracts
  • Small contractor development and training
03

Municipal
InfrastructureWater and sanitation

  • Water reticulation
  • Sewer reticulation
  • Water and waste water treatment
  • Pump station and bulk pipelines
  • Stormwater management
04

Transportation
EngineeringRoads and traffic

  • Geometric and pavement design
  • Road rehabilitation design
  • Traffic assessment studies
03 / Selected work

Built across
four countries.

Bridges, freeways, transloading facilities and high rise structures. A register of 17 representative commissions.

Loop and ramp roadworks under construction at the Mbudzi Interchange in Harare
Flagship
Harare, Zimbabwe / Commissioned 30 May 2025

Mbudzi Interchange

A grade separated interchange replacing an at grade roundabout: 5 main bridges, 2 underpasses, 6 culverts, loop and ramp systems, approximately 24 km of roadworks, over 15 km of stormwater pipes and channels, 6 km of bulk water main relocation, MSE retaining walls and full electrical installations.

/ Grade separated interchange
Structural rebar and tower of the 12 storey office building at 85 Anderson Street, Johannesburg
Johannesburg CBD / Completion December 2026

85 Anderson Street

Rehabilitation of a fire damaged barracks building and a new 12 storey office tower over a 16 m deep four level basement. Targeting a 4 star green rating.

R 420 million
Heavy structural steel and conveyor infrastructure representative of the Kusile coal transloading facility
Mpumalanga / Client: Eskom

Kusile Transloading

Bridge, weighbridge and conveyor belt design, coal offloading facility, structural steel transloading structures, road and drainage design, construction supervision.

R 310 million

Project register

17 commissions / values in ZAR
No. Project Client / Place Scope Value
01 Mbudzi InterchangeGrade separated interchange: 5 bridges, 2 underpasses, 6 culverts, 24 km roadworks, MSE retaining walls, full electrical. Harare, Zimbabwe Interchange design and construction monitoring Commissioned 2025
02 EFR1107, 85 Anderson StreetMarshalltown. Fire damaged 3 storey barracks rehabilitation plus 12 storey office tower, 16 m deep basement. Completion December 2026. Johannesburg CBD Structural design, lateral support, fire, HVAC R420,000,000
03 M2 Replacement of Finger Joints30 finger joints replaced under live traffic with a comprehensive traffic management plan. Just over 10 months, within budget. Johannesburg Expansion joint replacement, traffic management R30,000,000
04 Selby and Kazerne RehabilitationM2 Motorway. Bridge replacement addressing corbel failure and AAR damage, full closure, diversion of 22,000 daily trips. Completed 30 October 2019. Johannesburg Bridge replacement, diversion design R192,000,000
05 M1 Freeway, Oxford and FederationBackwall design and reconstruction, retaining wall stabilisation, bearing rehabilitation, stormwater redesign, 1 km carriageway reconstruction. Client: SANRAL Bridge rehabilitation, construction supervision R127,366,942.54
06 Eskom Kusile Coal TransloadingBridge, weighbridge and conveyor belt design, coal offloading facility, structural steel transloading, road and drainage design, supervision. Mpumalanga / Eskom Transloading facility design and supervision R310,000,000
07 JRA Bridge Inspections and BMS UpdateInspection of over 800 bridges and culverts, Strumans system updates, identification of critical bridges requiring remedial action. JRA, City of Johannesburg Bridge inspection, BMS update R50,000,000
08 JRA Visual Assessment of All RoadsRoad inspections, data collection and processing, road database administration across the City of Johannesburg. JRA, City of Johannesburg Road condition assessment, database R136,000,000
09 Heavy Rehabilitation of Road P122/110 km, Elardus Park to Kempton Park. Road design, drainage system design, project management, construction supervision. Gauteng Road rehabilitation, drainage, supervision R52,113,621
10 Mzilikazi River Bridge45 m three span design, pile design, flood hydrology and hydraulic design. River bridge Bridge and pile design, hydrology R50,159,863
11 Nxumalo River Bridge45 m three span design, pile design, flood hydrology and hydraulic design, construction supervision. River bridge Bridge and pile design, supervision R41,266,545.90
12 Zulu River Bridge45 m three span design, pile design, flood hydrology and hydraulic design, construction supervision. River bridge Bridge and pile design, supervision R50,858,845.71
13 Kinini River Bridge45 m three span design, pile design, flood hydrology and hydraulic design, construction supervision. River bridge Bridge and pile design, supervision R51,456,789.54
14 Coleraine River Bridge45 m three span design, pile design, flood hydrology and hydraulic design, construction supervision. River bridge Bridge and pile design, supervision R14,540,600.97
15 Main River BridgeRiver bridge design, caisson pile design, flood hydrology and hydraulic design, construction supervision. River bridge Bridge and caisson design, supervision R18,912,145.80
16 Niven River BridgeRiver bridge design, flood hydrology and hydraulic design, construction supervision. River bridge Bridge design, hydrology, supervision R6,705,905.65
17 Felstead River BridgeRiver bridge design, flood hydrology and hydraulic design, construction supervision. River bridge Bridge design, hydrology, supervision R2,666,648.16
04 / Leadership

Directed by
chartered engineers.

Owned and managed by suitably qualified members, holding more than five decades of combined civil engineering experience.

Portrait of Tendai Madzikanda, Managing Director of DNMZ International Managing Director

Tendai Madzikanda

PrEng / CEng / BSc Eng (Civil) / MIStructE

Earned a civil engineering degree in 1990 and passed the Institution of Structural Engineers examination in 1994, becoming a corporate member in 1995 and a Chartered Engineer through the Institution of Engineers, Europe the same year. Registered with ECSA and a corporate member of the UK Institution of Structural Engineers. Experience spans low and high rise buildings, bridges and structural engineering work.

Portrait of Alexander Nyoni, Director and Head of Civil and Transportation Engineering at DNMZ International Director / HOD Civil and Transport

Alexander Nyoni

BSc Eng (Civil) / MEng (Civil)

Graduated with honours in 1990. A Highways and Infrastructure Design Engineer covering highway design, drainage systems, project administration and infrastructure implementation. Work spans feasibility, investigation and accident analysis through outline and detail design to accident remedial measures.

Portrait of Anathi Cele, Director and Head of Structures at DNMZ International Director / HOD Structures

Anathi Cele

PrEng / BSc Eng (Civil) / MEng (Civil)

Earned a civil engineering degree in 2009 and a master's in 2019. A Professional Structural and Bridge Engineer working in industrial, commercial and residential structures plus bridge and culvert work. An accredited Bridge Inspector focused on new design and the rehabilitation of existing structures.

06 / Offices

Four countries,
one team.

If you have any questions or inquiries, please feel free to reach out. Our team is here to assist you.

Head officeSouth Africa

South Africa

417 Jan Smuts Avenue, Blairgowrie, Randburg, 2194, Gauteng. P O Box 411818 Craighall, 2024, Gauteng.
+27 11 789 9512
RegionalZimbabwe

Zimbabwe

15 Crinnis Road, Ballantyne Park, Harare.
+263 4 702884
RegionalBotswana

Botswana

Plot 131/11, Nkwe Square, Gaborone International Finance Park, Gaborone.
RegionalRwanda

Rwanda

5th Floor, Kigali Heights, Kigali. P.O. Box 5196, Kigali.
+250 783 304 967

Arrange a consultation
to discuss your civil or
structural project.

Consultancy alone or full design and build turnkey delivery. We work from concept planning through to completion, favouring employment intensive construction methods.

Call the head office →
Randburg, South Africa+27 11 789 9512