Complex sentence: She is the Chief Operating Officer of Cambridge Nanosystems, the management of which she joined in January 2015 as the first non co-founder, and where she is spearheading the production of ultra-high-quality, impurity-free graphene in high volumes for the very first time.
Split into simpler sentences: She is the Chief Operating Officer of Cambridge Nanosystems, the management of which she joined in January 2015 as the first non co-founder. At Cambridge Nanosystems, she is spearheading the production of ultra-high-quality, impurity-free graphene in high volumes for the very first time.