2 sentences

1. 他是这家工厂的一名技术员。

   tā shì zhè jiā gōng​chǎng de yī míng jì​shù​yuán.

   He is a technician at this factory.

   Source: Dong Chinese Dictionary

2. 技术员正在更换那个已经老化了的转换器。

   jì​shù​yuán zhèng​zài gēng​huàn nà gè yǐ​jīng lǎo​huà le de zhuǎn​huàn​qì.

   The technician is replacing that aging converter.

   Source: Dong Chinese Dictionary