[7] McKenna undertook initiatives to improve working conditions for associates, including efforts to clean stores, relax the dress code, and reinstituting Walmart Radio.

[7] She also developed training academies for associates, which includes digital learning tools and ongoing education opportunities.

[7][9] McKenna became president and CEO of Walmart International in February 2018, where she is responsible for the strategy and operations for more than 5,100 stores in 19 countries, including Mexico, Canada, China, and India.

[9][12] She has worked to expand the role of e-commerce in Walmart's businesses, including overseeing the $16 billion acquisition of 77 percent of Flipkart, the largest online retailer in India.

[14][15] McKenna met her husband, Phil Dutton, former finance director of Punch Taverns, when both worked at Asda.