Penelope Guarnay

Penelope Guarnay

Group Energy Manager, Marks and Spencer


Penelope commenced her career in Sustainability in the Property and Construction industry 10 years ago, before moving into energy efficiency and utilities 5 years ago. She also has experience across the Telecoms, Retail and Oil sectors, and is currently leading Marks and Spencer’s Energy Team on their journey to achieve a 50% energy reduction target by 2020. Penelope sees her biggest challenge as promoting improved collaboration amongst M&S suppliers.

In her spare time she enjoys spending time with her husband and young son, dabbling in photography, travelling and trying to improve her foreign language skills.


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