Josh Maher is Head of Research at Nextgen Signal AI, leading the development and deployment of the firm's machine learning and systematic investment strategies. His career spans over 20 years across quantitative research, portfolio construction, and high-frequency trading, with high-level institutional roles. Most recently, Josh served as Managing Director at AQR Capital Management, where he led portfolio construction teams responsible for AQR's trend following and risk parity products, applying quantitative research methodologies to systematic investment management at scale. Earlier in his career, he led a high-frequency trading and market making team at KCG (subsequently acquired by Virtu Financial), developing deep expertise in market microstructure, low-latency execution, and electronic liquidity provision in U.S. equities. His academic credentials include a Ph.D. in Mathematics from the University of Chicago.