[1] She worked for the London-based machinery manufacturer Messrs J B Stone & Co,[2] initially as a shorthand typist, becoming company Secretary before being appointed to joint managing director in 1915.

Despite her commercial achievements as a female engineer and business woman post-World War I, including opportunities to travel to America, Kennedy remained adamant that she did not label herself as a feminist, stating in her WES retiring president's address:[3]"I am not a feminist"..."I have never been one, and although I may offend some of my women friends by saying so, I do not think it was the fact that they chained themselves to railings which obtained the vote for women.

[6] In 1911, American born James Barnes Stone, manager of the company, was living as a boarder in Kennedy's home, 35 Allerton Road in Stoke Newington.

[3] In 1927 she gave a lecture titled A Business Woman's Trip to America as well as a debate on The Relative Importance of Commercial and Technical Engineering under Present-Day Conditions.

[2] As part of the latter event, Kennedy argued from the commercial point of view against Verena Holmes who debated for the technical side.

During this debate, Kennedy stressed the importance of harmony between the commercial and technical roles in engineering because "[Invention] cannot progress without finance" yet still required "vision and enterprise to produce what is needed".

[3] She speculated that a potential cause was due to "colossal over-production during the end of and shortly after the war, when firms had been speeded up to meet great demands".

When these products were no longer required, manufacturers were forced to buy back excess stock to prevent them from being "sold off cheaply and flooding the markets".

She was impressed by the tremendous enterprise of Americans, stating that a "man would throw up his job when he was middle-aged and start afresh, such a thing being utmost unheard of in this country".

Kennedy comments on the spirit of co-operation between factory owners and workers, summarising that "there is always a cheery word and smile for everyone, which is very typical of the American business man".