She had the phone number of Myra Hess, the pianist, and the latter invited the couple to her house in Golders Green, where they learnt of the declaration of war.
[1] Grindea urged Hess not to enlist as an ambulance driver and instead establish a series of lunchtime concerts at London's National Gallery that ran during the war.
[5] The following year after she left, Grindea's enthusiasm for teaching earned her the role of a piano professor at the Guildhall School of Music and Drama.
[1] She also began a lecture series called Techniques of Piano Teaching,[5] which was considered a revolutionary in the United Kingdom because of the prevalent attitude amongst young pianists at the time that those would could not play taught.
[8] The objective of EPTA is to improve teaching of piano through the holding of conferences, master classes, recitals and workshops for those musicians who were traditionally isolated.
[6] On 2 November 2007, the Music Teachers National Association awarded her a "Citation of Leadership", which was collected by her daughter when Grindea was unable to attend the ceremony.