The firm, which is based in Washington, Tyne & Wear, UK, produces over 3bn packaging items per year including corrugated and solid board boxes.
As part of her role, Croisdale looks after everything to do with the environment from energy and waste management to environmental accreditations such as ISO14001, supply chain, continuous improvement and compliance with environmental legal requirements.
She joined 13 friends to climb Ben Nevis (1,344m), in Scotland, Scafell Pike (978m), in the Lake District, and Snowdon (1,085m), Wales, within 24-hours on June 28 and 29.
The team completed the challenge in 23 hours, 49 minutes and has so far raised £1,805.
To make a donation to the cause visit http://www.justgiving.com/3PC14-MarieCurie
To take part in our Lunch time bites podcast series email Jenny Eagle, editor, at firstname.lastname@example.org with 'Lunch time bites' in the subject line.