[1][3] Danieli's grandfather Mario was born in Valsugana and he and his brother Timo were the first in Italy to employ electric arc furnaces in producing steel in 1914.

[1][9] She established a managerial department focused on the company's commercial, production and technical side,[1] and expanded sales to Asia, the Americas and the Soviet Union.

[3][10][11] In the same year, on the advice of corporate experts, Danieli accepted the idea of making the company public as a financial tool to allow her to strive of the business' new objectives.

[5][9] During her leadership, she focused on the design and development of relatively small units called mini-mills which could allow for the more efficient and cheap production of high-quality steel than traditional mills.

[5] Danieli also became a shareholder of INA in 1994 and declined an offer to lead the General Confederation of Italian Industry since she wanted to keep a low profile.

[11] John Tagliabue of The New York Times noted that as a woman, Danieli was "one of a handful who reached the top in the male domain of heavy industry" and that her leadership allowed her to say she had "a higher percentage of women in management posts than Italian companies of comparable size.

"[5] She was inducted into the American Metal Market Hall of Fame in 2013 "for her role in guiding Danieli Group to the forefront in the construction and equipping of steel mini-mills".