Recent hires and promotions in the last 6 months are leading to a drastic culture shift away from a scrappy startup towards a bureaucratic organization where some influence-seeking managers fight for undeserved headcount while other core technical & clinical roles go unfilled for months
Competent managers on the technical teams are much less skilled at corporate politics and "managing up" compared to their counterparts on the sales/product side. This leads to executives overweighting input from less knowledgeable sources and mis-diagnosing the root cause of the some of the firms struggles and hiring & promoting the wrong functions/roles.
Productivity does not seem to be tied to pay-increases or promotions. You can be an early-employee with a track record of successfully managing & delivering dozens of projects and well-liked by the 90% of the company yet end up with another layer of management hired on top of your vertical instead of being promoted into the role yourself.
Unless your manager is skilled at corporate politics (eg. on the business/sales side), you likely won't have meaningful career growth in terms of titles/promotions. You can however still learn from world-class doctors, engineers, and scientists & grow your skills to prepare for the next role outside of the firm. The top performers who've already left here have all landed somewhere really nice.
There is also a tiny bit of a "good old boys" culture (people currently in power hire and promote other people similar to them in demeanor & background), which is fine for the 1980s but probably not in 2017.