article_snippet: One electrical engineering firm that diversified and began to employ women in 1915 was owned by Sebastian Ziani de Ferranti .
article_snippet: And one electrical engineering firm that diversified and began to employ women in 1915 was owned by Sebastian Ziani de Ferranti in Oldham.
article_snippet: In the same year, Sebastian Ziani de Ferranti hired the first female supervisor - family friend Olivia Forbes, who ended up working for the firm for 40 years.