AMEC plc (LSE: AMEC) is a multinational consultancy, engineering and project management company headquartered in London, United Kingdom. It is focused on the oil and gas, minerals and metals, renewable energy, environment and infrastructure sectors and has offices in 40 countries worldwide. Roughly a third of its turnover comes from Europe, half from North America and 12% from the rest of the world.

AMEC is listed on the London Stock Exchange and is a constituent of the FTSE 100 Index.

AMEC was formed from the 1982 amalgamation of Leonard Fairclough & Son (founded 1883) and the William Press Group (founded 1913). In 1988, AMEC went on to acquire Matthew Hall Group.

In 1996, AMEC took control of Spie Batignolles from Schneider buying a +40% stake in association with a management buyout. In 2002-2003 it completed the purchase, and launched the AMEC SPIE brand for engineering services in Europe,, a rail construction business AMEC Spie Rail was created, and the remaining construction business was retained by Spie Batignolles. The company announced that it would seek to sell the construction arm of the business Spie Batignolles, and entered negotiations to secure a management buyout of that division; the management buyout was completed in September 2003 with the aid of Barclays Private Equity Finance.