Nicholas Weininger (b. 1978) is a composer, singer, software engineering manager, and leadership coach. Nick's works for a cappella chorus have been performed by ensembles across the US, ranging from the International Orange Chorale of San Francisco and the NYC-based ensemble Choral Chameleon to the West Genesee High School Chorale, the Germantown Friends School Concert Choir, and the festival ensemble Coro Mundi. In March 2023, the Empire City Men's Chorus premiered his cantata Hakol Hevel (All is Mere Breath) for TTBB chorus, orchestra, and soloists. Nick's works are published through Personage Press and ArrangeMe.

Nick has sung with the International Orange Chorale of San Francisco (IOCSF) since 2007. He began composing for IOCSF in 2011 and in 2015-2016 served as IOCSF's inaugural Composer-in-Residence; the ensemble has performed ten of his works in all and recorded four on the albums The Unknown Region and Hope in Times of Disquiet. Nick's 2016 setting of "As kingfishers catch fire", commissioned by IOCSF, was awarded second prize in the Ithaca College Choral Composition Competition and was a finalist for the 2020 American Prize. Nick's singing experience also includes stints with the San Francisco Symphony Chorus, Festival Napa Valley Volti Chorale, and Coro Mundi.

In Nick's non-musical life, he has spent most of his career managing teams of software engineers and mentoring software engineering leaders, notably at Google from 2005 to 2020. He received a PhD in pure mathematics from Rutgers University in 2005. Initially an autodidact composer, Nick took up private composition study with Joseph Stillwell in 2014 and now studies with Vince Peterson. Nick lives in San Francisco with his wife and son.