Density, a San Francisco-based tech firm that uses sensors to measure how busy a space is in real time, has hired a Maynard Cooper & Gale partner as its first general counsel.

Jamal Al-Haj headed Maynard’s West Coast practice, which he said worked with some of the “best and brightest” innovators, entrepreneurs and investors. ”None impressed me more than Density. The team and product are bar none,” Al-Haj said on LinkedIn.