AMEC completes acquisition of MACTEC

For immediate release

3 June 2011

AMEC completes acquisition of leading US engineering and environmental services company MACTEC

AMEC, the international engineering and project management company, announces today that it has completed the acquisition of MACTEC, a leading US engineering and environmental services company. As previously announced, the cash consideration was US$280 million.

A small MACTEC subsidiary, MACTEC Development Corporation, will be run as a standalone entity, with its existing management, until final regulatory approval is obtained from the US Nuclear Regulatory Commission. This is expected in due course.

Enquiries to:

AMEC plc +44 (0) 20 7539 5800

Sue Scholes, Director of Communications

Nicola-Jane Brooks, Head of Investor Relations

ENDS

Notes to Editors:

·; AMEC (LSE: AMEC) is a focused supplier of high-value consultancy, engineering and project management services to the world's oil and gas, minerals and metals, clean energy, water and environmental sectors. With annual revenues of almost £3 billion, AMEC designs, delivers and maintains strategic and complex assets for its customers. Including MACTEC, the company employs over 25,000 people in around 40 countries worldwide. See amec.com. amec.com

·; MACTEC (www.mactec.com), based in Alpharetta, Ga., US, is a leading engineering and design, environmental, and construction firm focused on four strategic business lines: Industrial/Commercial, Infrastructure (Transportation and Municipal), Energy, and Federal.

MACTEC offers an ever-broadening portfolio of sustainable solutions, from renewable energy to facility asset management. With annual revenues of more than $411 million, MACTEC's 2,600 employees work from over 70 offices nationwide. MACTEC consistently ranks in the top 10 per cent of Engineering News-Record's Top 500 Design Firms.