While first browsing through the website of New York City based OBR Architects, I was pleasantly reminded of the early works of Steven Holl. Upon clicking the profile link, I found out why - the firm's principles, Pablo Castro and Jennifer Lee, are both Holl office alumni.
Their work has a certain simplicity, more a distillation really, derived from rigorous study and attention to detail. It is clear that they have a strong design ethic that is both academic and practical.
Link: OBRA Architects