Hart spent the next several years working for designers such as Anna Sui, Tommy Hilfiger and Ralph Lauren. During that time, Hart honed his skills and made the switch to menswear — an area where he saw a void. In 2009, he took a leap on his own. He launched an independent line of luxury ties, bow ties and pocket scarves. He then expanded his offerings when he unveiled his first full ready-to-wear collection of menswear in 2013 under the eponymous label, David Hart.