There are plenty of attempts at making the company more environmental responsible. People can also win a prize by reducing waste or diminishing carbon footprints.
Misc stuff around the office, carbon neutral, hybrid vehicles, recycling etc etc
Despite geotechnical engineering being a field that is notorious for hard to be sustainable. The Mott Macdonald geotechnical team is still able to make many sustainability decisions, such as maximise cut material for filling through adjustment of cut and fill ratio. reinforced slope to reduce volume of fill and its associated transport and processing energy consumption. Or the use of sustainable / natural material such as vegetation rather than synthetic alternatives.
I would say motts actively encourages sustainability through initiatives