Asiff Hirji, president and Chief Operating Officer (COO) of Coinbase, is exiting the firm.

Hirji has worked with Coinbase since December 2017.  He previously worked at VC startup Andreessen Horowitz as well as TD Ameritrade.

In a statement, Coinbase CEO Brian Armstrong commended Hirji for his work at the exchange and noted that the outgoing president had come to Coinbase when the firm really needed someone of his experience and expertise.

Armstrong added that the company was “incredibly grateful” for what Hirji did during his time at the firm. Asiff leaves the company after 18 months in which it experienced tremendous growth, the CEO in a blog post.

Furthermore, Armstrong said that Hirji’s experience and mentorship were of great help to Coinbase helping it transit through what he termed “an important chapter in its history.”

Emillie Choi, until recently the firm’s VP of Business, data, and International, is to take the Hirji’s place as the new COO.

Choi was behind Coinbase latest funding round which ended in the month of October last year. During the Series E funding round, the company was able to raise $300 million. Coinbase valuation now stands at $8 billion.

As the crypto exchange’s president leaves, more changes are expected to affect the company’s top leadership. Notably, most of the C-suite departures are people who have helped Coinbase grow into the crypto unicorn it is today.

In April, Coinbase VP of International business Dan Romero left the firm after working with Coinbase for five years. Last month, the company’s chief technology officer (CTO) Balaji Srinivasan also left.

Reports from industry news site The Information have it that Tina Bhatnagar, who is the company’s VP of operations and technology, is also set to leave.

Coinbase is one of the ten exchanges research has shown do not fake their trading volumes.