Bruinier was the third son of Jan Berend Hendrik Bruinier (1863 - 1934) and Sophie Bruinier (born Sophie Wagner, 1867). Despite being born in Frankfurt he inherited Dutch citizenship from his father. He attended junior and middle school in the Steglitz quarter of Berlin after which he worked for more than a year, in 1916/1917, as a machine technician at the Dingler Works in Zweibrücken. After this he returned to complete his secondary schooling at Steglitz, passing his School final exams (Abitur) in 1920, and then moving across the border to Hengelo where for eight months he worked as a technical draftsman at a machinery factory. Following that, till April 1922 he undertook his military service in the Netherlands. In May 1922 he returned to Berlin where he enrolled to study Technical Chemistry at the Technical University. He was still a chemistry student when he first performed with the Stefan Weintraub danceband in 1924.[2]
As a child Bruinier received 'cello lessons, and from 1922 he was making public appearances in a trio with his two brothers, August and Franz.[3] From 1 August 1926 he belonged to one of Germany's best known jazz bands of the time, Weintraub's Syncopators. There he played the trumpet, sousaphone, tuba, 'cello and double bass. Along with his instrumental contributions he demonstrated a rare talent for performance-grade whistling ("Kunstpfeiffen").[4] He also participated with the Weintraubs Syncopators in the "Monday Evening" (Montagabend / MA) cabaret/review series, for which his younger brother. Franz, wrote most of the music. Other reviews in which they took part during the later 1920s were "Was Sie wollen" ("What you want") by Marcellus Schiffer and "Das bist Du" ("That's you"), with music by Friedrich Hollaender. In 1928 Ansco Bruinier was part of a Weintraub's Syncopators tour of Germany which included a show with Kate Kühl at the Großer Feldberg "Feldberghaus" venue.[5] Proceeds from Bruinier's musical activities now helped him to finance his further education.
In September 1928 Bruinier temporarily left the band in order to complete his studies, emerging a year later with an engineering degree. Despite the degree, however, as a foreign national during the unemployment surge that accompanied the Great Depression he was unable to find employment as an engineer, and he rejoined Weintraub's Syncopators at the end of 1929. In September 1930 he finally found a permanent job, working for Shell Oil. During the next few years he worked for the company round the world, with lengthy stints in Romania, Borneo and Argentina. After 1936 he was based mostly at the company's vast facility at Hamburg. He remained with Shell till his retirement, when he relocated to Bernried on Lake Starnberg, south of Munich.
