Wɔ afe 1923 mu no, Obetse Lamptey twaa nsohwɛ a ɛne Civil Service no maa no bɛyɛ ɔkyerɛwfo wɔ adwumakuo a ɛne Customs and Excise Department. ɔyɛɛ adwumaa wɔ nkran kosii afe 1930, ne koradi kosii afe 1934 bre a otuu kwan kɔɔ United Kingdom kosuaa mmaranim.