The maritime journey started in 1779, when the Muller family became active in the shipping industry. Teunis Muller became skipper on the market ferry (beurtvaart) from Dordrecht to Zwijndrecht.

Teunis Muller (1894-1968) was working on the tugboat for his father Leendert Muller until half 1918. Together with his brother Jan Muller, Teun started to rent the tug EN AVANT III.

Rederij T. Muller BV, known as Sleepdienst “En Avant” at that time, was founded by Teun Muller in 1918. Later on in 1922 Teun continued the business on it’s own.

In this period Muller became very active in the project called Zuiderzee Works (Dutch: Zuiderzeewerken). This project is a man-made system of dams and dikes, land reclamation and water drainage work, in total the largest hydraulic engineering project undertaken by the Netherlands during the twentieth century. The project involved the damming of the Zuiderzee, a large, shallow inlet of the North Sea, and the reclamation of land in the newly enclosed water using polders. Its main purposes are to improve flood protection and create additional land for agriculture.

The American Society of Civil Engineers declared these works, together with the Delta Works in the South-West of the Netherlands, as among the Seven Wonders of the Modern World.

Muller became market specialist in transporting and commissioning (swimming-in) of several bridges after the Second World War (WWII). One of the important landmarks was the Moerdijk bridge, which had to be restored. By the use of barges and tugs, Muller succesfully sailed in the several bridgespans over the river. This job was picked up by by the national newspapers and resulted in many contracts with the national authorities and local steel company’s.

In this period Muller became very active in the project called Zuiderzee Works (Dutch: Zuiderzeewerken). This project is a man-made system of dams and dikes, land reclamation and water drainage work, in total the largest hydraulic engineering project undertaken by the Netherlands during the twentieth century. The project involved the damming of the Zuiderzee, a large, shallow inlet of the North Sea, and the reclamation of land in the newly enclosed water using polders. Its main purposes are to improve flood protection and create additional land for agriculture.

The American Society of Civil Engineers declared these works, together with the Delta Works in the South-West of the Netherlands, as among the Seven Wonders of the Modern World.

Muller gets involved in the offshore oil & gas industry, which was becoming a fast growing market on the North Sea at that period. The towage experience within our company became a great value for the special towages of the offshore barges and major cargo moves within the regional ports and shallow draught places.

In 1983 Muller acquired Hak Heavy Transport who was active in het heavy transport and lifting market in Europe. Because of this Muller got involved in transporting and lifting heavy and voluminous loads.

Harbour towage in Dordrecht & Moerdijk area was included to the company’s activities