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When [https://memory-alpha.fandom.com/wiki/Sergey_Rozhenko Sergey Rozhenko] met Chief [https://memory-alpha.fandom.com/wiki/Miles_O'Brien [Miles O'Brien]] (then [[transporter chief|Transporter Chief]]) aboard the [https://memory-alpha.fandom.com/wiki/USS_Enterprise_([USS Enterprise, NCC-1701-D) |USS Enterprise-D]] in [[2367]], Rozhenko was excited to meet another chief petty officer. When O'Brien introduced himself, he acknowledged Rozhenko as 'sir.' According to Sergey, his proudest moment was when their adopted son, [https://memory-alpha.fandom.com/wiki/Worf [Worf]], had earned his commission (graduated [[Star Fleet Academy]]).