She said that they are not winding down on oil and gas because they are planning to explore and extract more than that, contrary to Shell's public expressions around ''net zero.
Net zero means not adding to the amount of greenhouse gases in the atmosphere. Achieving emissions means reducing emissions as much as possible, as well as balancing out any remaining emissions by removing an equivalent amount.
She said Shell should be using all its capital, technical and human power to lead this transition, but they have no plan to do it.
Ms Dennett said she has been a safety consultant at Shell for more than a decade and that her job involved surveying its employees and contractors around the world with the aim of reducing accidents and oil spills.
A company spokesman said that we have set targets for the short, medium and long term, and we have every intention of hitting them.
The world needs oil and gas for decades to come in sectors that can't be easily decarbonised, and we're already investing billions of dollars in low-carbon energy, according to the spokesperson.