Walker-Miller founded Walker-Miller Energy Services in 2000. Before the
Great Recession, she sold a wide range of energy equipment, similar to the work she had done for an engineering firm before founding her own company. and Walker-Miller Energy Services made the
Inc. 5000 list of fastest growing private companies five times between 2007 and 2016. In 2014, she was selected to participate in the
Goldman Sachs 10,000 Small Businesses program, and received intensive training. She has since credited the program with helping the success of her business. As of 2018, company contracts include utility companies in Michigan, Ohio and Illinois. In 2020, she was elected to a three-year term on the Board of Trustees at
The Henry Ford. She also is a public speaker. ==Honors and awards==