
Rachel Cole is a librarian with Northwestern Universityâs Transportation Library.
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.

Mary Barra, née Mary Teresa Makela (born December 24, 1961, Waterford, Michigan), is chief executive officer and chair of the board of General Motors Company (GM). When she was appointed CEO in 2014, Barra became the first woman to head a global automaker.
As a senior engineer at the Pontiac Fiero plant, Mary Barra gained hands-on experience in manufacturing and quality control. The Fiero, introduced in 1983 as an â84 model, was GMâs first mass-produced mid-engine car and an ambitious attempt to blend fuel efficiency with sports car design. It featured plastic body panels over a steel frame, a lightweight structure that was ahead of its time.
Early models had reliability issues and lacked the power and handling expected of a sports car, which hurt its reputation. GM made improvements to the Fiero during its production, but after five years on the market, the company discontinued it in 1988. Despite its short model run, the Fiero remains notable for its innovative design and as one of GMâs early mid-engine experiments.
Growing up in suburban Detroit, Barra was immersed in the automotive industry from an early age. Her father worked as a skilled die maker for GM for 39 years, and the new vehicles he would occasionally bring home helped spark her early interest in engineering and the company. At age 10, she was captivated by a cousinâs late-â60s red Chevrolet Camaro convertible, later describing it as âa beautiful, beautiful vehicle.â
Barra began her career with GM in 1980 at age 18. Through the companyâs cooperative education program, she worked while attending college, inspecting fenders and hoods at a GM plant in Pontiac, Michigan. In return, the company helped pay her tuition at General Motors Institute (now Kettering University) in Flint. She earned a bachelorâs degree in electrical engineering in 1985. She and her older brother, Paul, were the first generation of their family to attend college.
After graduating, Barra became a senior engineer at GMâs Pontiac Fiero plant. Recognizing her leadership potential, General Motors awarded her a fellowship to attend the Stanford Graduate School of Business. Barra graduated with an MBA in 1990 and returned to GM, where she led manufacturing planning.
From 1999 to 2001, Barra headed GMâs internal communications team. In 2003, she became the plant manager for the Detroit Hamtramck assembly plant. The following year, she was selected to serve as the companyâs executive director of vehicle manufacturing engineering, and in 2008 she advanced to the position of vice president for GMâs global manufacturing engineering division.
She continued to gain experience in diverse sectors within the company, working as GMâs vice president for global human resources beginning in 2009. In 2011, she returned to the product and engineering side as senior vice president of global product development, overseeing the design, engineering, program management, and quality of the companyâs vehicles worldwide.
Sales rose 13% under her leadership, earning praise from industry leaders and making her the highest-ranking woman in the automotive industry. Two years later, she was promoted to executive vice president for global product development, purchasing, and supply chain.
Barra was named the automakerâs CEO on December 10, 2013, and officially began her role January 15, 2014. At the time, Barra was just one of 23 women to head a Fortune 500 company. Her rise through the ranks of product development marked a shift from GMâs tradition of appointing CEOs from its finance division.
When Mary Barra became GMâs CEO in 2014, she was one of just 23 women leading a Fortune 500 company. Although that number has grown, women still make up a small percentage of top executives.
In 2024, 52 women led Fortune 500 companies, down slightly from a record 53 in 2023, representing just 10.4% of all companies on the list. Barra is among the longest-serving female CEOs, having surpassed 11 years in the role as of January 2025. Her tenure as top executive is the second longest in GMâs history, following Alfred P. Sloan, Jr., who was president from 1923 to 1937 and chairman until 1956.
She assumed leadership during a turbulent time for the company. Soon after her appointment, she participated in congressional hearings about GMâs mishandling of faulty ignition switches installed in the Chevrolet Cobalt, Saturn Ion, and other vehicles, a defect linked to more than 120 fatalities. GM acknowledged its role in failing to address the issue sooner and established a compensation fund for victims.
Barra introduced a renewed focus on safety, transparency, and accountability, implementing new safety measures including a âspeak up for safetyâ campaign to encourage employees to report unsafe practices. Barra was credited with guiding GM through what has been called the biggest safety crisis in its history.
As CEO, Barra has pushed GM toward electric, autonomous, and Internet-enabled vehicles designed to enhance navigation, safety, and diagnostics. At the same time, she has focused on improving vehicle quality and revitalizing storied nameplates. Leading with the directive of âno more crappy cars,â she spearheaded efforts to modernize the Cadillac and Buick divisions and Chevrolet Corvette sports car. The company posted record global sales and net income in 2015, just one year after Barra took over as head. She was elected chairman of the board the following year and later adopted the gender-neutral title âchair.â
General Motors acquired robotaxi company Cruise in 2016, making it a key part of its autonomous vehicle strategy. After a series of high-profile collisions, GM shut down the unit in 2024 and shifted its focus to developing autonomous technologies rather than operating a taxi service.
In 2020, Barra set a goal for GM to become the most inclusive company in the world, prioritizing a diverse workforce and launching a new diversity, equity, and inclusion (DEI) initiative. By 2021, the company had reached a significant milestone, with women holding a majority of seats on the board of directors and expanded opportunities for women in executive roles and skilled trades.
In 2021, under Barraâs leadership, GM became the first major U.S. automaker to set a goal of becoming carbon neutral by 2040. She spearheaded the companyâs pledge to phase out production of vehicles using internal-combustion engines and transition to an all-electric lineup by 2035.
As of January 2025, GM remained committed to these goals while other automakers, including Ford Motor Company (F), Volvo, and Jaguar Land Rover, have pushed back their timelines, citing moderating consumer demand for EVs and other factors.
Rachel Cole