Farkas Barron Jablonsky was founded in 1955 as Farkas Barron Jablonsky (Canada) Ltd., a wholly owned subsidiary of the New York consulting firm of Farkas Barron, under the management of Jerry Jablonsky as chief engineer.

By 1956 it was designing large multi-storey developments typified by the five-building, Brentwood Towers complex at Davisville and Yonge Street in Toronto. By the early 1960's it was working on some of downtown Toronto's major office building projects such as the prestigous National Trust Building.

In 1965, Jerry Jablonsky aquired interest in the firm to become a full partner. To reflect change in ownership the name of the firm was changed to Farkas Barron Jablonsky.

In 1970, with the firm's reputation established and the organization recognized as able to handle virtually any structural engineering assignment, the ownership was changed once more to give the Canadian engineers a 50% interest in the company.

During the next few years the firm's principals confirmed their rapidly growing personal reputation for the handling of difficult assignments by developing three different commercial building systems and travelling extensively throughout North and Central America and Europe to find the most sophisticated solutions to client's problems.

In 1973 the Canadian employees of the firm again increased their holdings to obtain complete control of the company. In January 1980 the name of the firm was changed to Jablonsky Associates.

Since 1980 the firm has provided structural designs, drawings, and specifications for a variety of building types ranging from condominiums through schools, light industrial, shopping centres, hospitals, government offices, to mixed use and high rise offices. There has also been an involvement in various building science problems related to the rehabilitation of masonry walls and parking garage structures.

In 1988, to reflect a further adjustment in management responsibilities as well as the coming of a new generation of principals, the company name was changed to Jablonsky, Ast and Partners Consulting Engineers.