Do was born in Biên Hòa, Vietnam, and moved to Philadelphia at age 14.[1][2] He attended the Fashion Institute of Technology in New York City, and graduated in 2014, winning the LVMH Graduate Prize.[3] Afterwards, he worked at Phoebe Philo’s Celine and then at Derek Lam.[3] Do frequently wears a cloth face mask.[4]
He started his own eponymous label in 2018.[2] His designs were worn by Zendaya and Beyoncé.[3][5]
In May 2023, Peter Do was announced as the new creative director of Helmut Lang. He officially debuted his Spring/Summer 2024 collection for the brand in September 2023 at New York Fashion Week, presenting a vision of accessible, high-quality wardrobe staples rooted in practical luxury.[6][7] The collection received mixed reviews. In a review for The Cut, Cathy Horyn describing it as "devoid of meaning", and compared the collection to Helmut Lang's sister company, Uniqlo. In a review for The New York Times, Vanessa Friedman said that the collection was "accomplished, accessible, and very commercial", but that it was missing the "subversion" found in the collections made when Helmut Lang was creative director.[8] In a review for Washington Post, Rachel Tashjian said that his debut "stole the show", and that the collection was "raw [...] and precise".[4] Do left Helmut Lang in November 2024.[9]
A more affordable offshoot label, PD-168, was launched by Do in September 2025.[10] He only uses three fabrics across the line — cotton terry, supple jersey, and Japanese ‘liquid satin’ — all of which are machine-washable.[11][12]