[5] Their primary teachers include Martin Bresnick, Bernard Rands, Julian Anderson, Steven Stucky, Augusta Read Thomas, and Robert Morris.
[9] In 2016, Lash composed new works for pianist Lisa Moore and loadbang for a Portrait Concert at Columbia University's Miller Theatre.
[15] And in November 2021, Lash premiered their double harp concerto, The Peril of Dreams, with the Seattle Symphony and its principal harpist Valerie Muzzolini.
Michael Schell wrote: "Lash’s 45-minute work manages to avoid the clichés and sentimentality to which harp music often succumbs".
[18] Lash's awards and honors include a Fromm Foundation Commission, a fellowship from Yaddo Artist Colony, the Naumburg Prize,[19] the ASCAP Morton Gould Young Composer Award,[20] a Charles Ives Scholarship (2011) and Charles Ives Fellowship (2016) from the American Academy of Arts and Letters,[21][22] the Barnard Rogers Prize, and the Bernard and Rose Sernoffsky Prize.