After her postgraduate studies, Hargrove remained at the University of Cambridge as a Fellow of Sidney Sussex College.[9][10] She joined McLaren in 1997, where she worked in vehicle dynamics.[11] For ten years she was responsible for the McLaren F1 simulator.[9] She was one of the founders of McLaren Applied Technologies[12] as Programme Director in 2007, then Technical Director in 2013 and CTO in 2018.[13] Her job involved R&D strategy and IP development.[14] She championed the use of big data in motor racing.[15] She helped translate the technology of McLaren F1 to medical services, developing analysis and support tools.[16][17][18] She worked with Olympic athletes and the UK track cycling team.[1][11][19][20] She created a data-logger that mounts under the saddle to collect information of speed, power, tilt and torque, then send it to the coach.[5] Her team translated the 3D accelerometers from Formula One cars into sensors for human use, working with GlaxoSmithKline to monitor patient's response to drugs.[21][22] In 2016 she announced the use of their simulator for testing domestic vehicles.[23]
In 2018 she became the CTO of Babylon Health, focussing on the use of AI to diagnose patients.[25]
In April 2021 she was named as CTO of Zedsen, a UK based startup that provides non-invasive blood sugar monitoring technology.[26]
Later that year she joined Ceres Power (developers of fuel cell and green hydrogen technology) as Chief Technology Officer, having been a non-executive director of the company for the previous three years.[27] She remained as a non-executive at Zedsen.
Hargrove is an advocate for increasing the number of girls and women in engineering through visits to schools and on-site work experience.[28][29]
She was elected a Fellow of the Royal Academy of Engineering in 2017,[31][24] and was subsequently profiled in the in-house magazine Ingenia.[32] In the same year she was announced as one of the Top 50 Innovators in the World by Codex.[33]
on 6 March 2020 The BBC World Service featured Hogue on their World Wise Web series being interviewed by a 16 year old motor racing fan about the F1 simulator.[38]