Since its inception in 1955 SNA has, in particular, specialised in the field of Road Engineering which has been its core field of enterprise over the years. SNA has planned, designed and supervised the construction of hundreds of kilometres of rural and urban roads and freeways and played a major role in the development of the road infrastructure network of Southern Africa. The firm has undertaken projects for almost all the State Road Authorities in South Africa as well as various Local Authorities, other large private bodies and neighbouring countries.

As the road infrastructure network has developed, it has required maintenance and rehabilitation to provide the public with good roads. SNA has developed skills in Road Pavement Management Systems and Road Rehabilitation Systems and is able to offer clients specialist services in this field.

SNA offers professional services in the full spectrum of skills required for developing roads and freeways in South Africa including the development and integration of the following:

Feasibility studies                                                          
Route evaluation and location
Traffic studies
Consultation with authorities and the public
Environmental impact analysis
Negotiation with utility owners for the relocation of services
Geometric design
Pavement design
Materials investigation, utilisation and design
Stormwater drainage design
Bridge and other road related structures design
Project documentation and tender evaluation
Project management and site supervision.

With the on-going need to maintain the existing South African Road Network, SNA has developed effective methods regarding the rehabilitation of both rigid and flexible pavements. Some facets of this specialist field include the following:

Visual surveys
In-situ field testing
Pavement analysis and deterioration models
Pavement strategies
Value engineering and economic analysis
Specialised project documentation and tender evaluation
Project management and site supervision.

Through its involvement as the leading Consulting Engineer for the Witbank to Maputo Toll Road of the Maputo Development Corridor, SNA has developed specialised skills in Build, Operate and Transfer Projects in Southern Africa.

SNA has developed good relationships with emerging consultants in South Africa and has entered into numerous joint venture partnerships with these companies and has also been involved with technical skills transfer in this regard.

SNA has a fully developed Quality Management System compliant with ISO 9001.