Smith has built and managed renovations of several major and minor league baseball parks in the United States including Baltimore, Atlanta, Boston, and Los Angeles.

[2][3] She became one of the first women to hold an executive position with any Major League Baseball club[4] when she was promoted to Vice President of Planning and Development with the Baltimore Orioles in 1989.

"[20][21] Starting in 1989 and continuing to date (July 2021), Smith oversaw multiple MLB stadium projects for the Baltimore Orioles, the Atlanta Braves, the Boston Red Sox and the Los Angeles Dodgers.

Smith followed news on the downtown Baltimore urban planning saga surrounding OPACY and wrote a letter to Lucchino, offering to help get the Orioles' new ballpark built.

In 1989, Smith became the Orioles' Vice President of Planning and Development and was one of the first women to hold this executive position in the history of Major League Baseball.

Camden Yards is the first park to feature Smith's hallmark retro style, combining elements from the great ballparks of the past with modern amenities.

[37] The previous owners planned to tear down the nearly 100-year-old ballpark and build a modern park in its place, but they could not secure public funds to execute the project.

"[32] Over ten years, renovations were made to address much-needed infrastructure upgrades, as well as enhanced spaces for fans, the press, and for players, adding features that came to fruition under Smith's watch.

[2][39] Smith was pivotal in the Red Sox obtaining permission from the city of Boston to take over an alley that abutted Fenway Park behind the right field grandstand, and she used this opportunity to extend and enlarge the concourse and install the largest women's room in Major League Baseball.

Behind the third base grandstand, Smith's plans opened up a deck, adding additional food options in the Jeano Building (which Tom Yawkey purchased and attached to the park).

[44] This third-oldest ballpark in Major League Baseball,[45] Dodger Stadium opened in 1962 on the hilltop of Chavez Ravine overlooking the city of Los Angeles.

The project included restoration of the mid-twentieth century cosmetic details, as well as upgrades of new HD video screens and wider concourses.

A bronze statue of Jackie Robinson, a former Brooklyn Dodger and the first African American to play Major League Baseball, will grace the side of the new entrance.

[48] Though the new upgrades are extensive, the stadium's superlatives, including its 56,000 seat capacity and sweeping views of Los Angeles from behind the home plate, remain unchanged.

[57] Working for Orioles owner, Peter Angelos, Smith coordinated the metamorphosis of an old spring training ballpark, which could not provide the comforts that fans in Florida needed, like plenty of shade, large sweeping concourses, and air-conditioned dining.

In 2012, Ed Smith Stadium was awarded the Institute of Classical Architecture & Art, Florida Chapter – Addison Mizner Medal.

[67][68] Creating a minor-league ballpark requires unique planning as games start earlier, the season is shorter and the park itself needs to be interesting to attract local families, with some of the best ideas having come from fans.

It also includes contactless payments with club plans to create virtual tickets that double as a stored-value cards for seamless transactions in the park's concession stands.

[71] As a newly minted architect and urban planner, Smith served as a coordinator of architecture and design for Battery Park City, a 92-acre, $3 billion waterfront development project at the tip of lower Manhattan that includes the World Financial Center.

[27] As president of this nonprofit business organization, Smith participated in a plan to revitalize Los Angeles's oldest public park, Pershing Square.