As Massport's board of directors is bringing in a new CEO for the powerful agency, that incoming chief will step into a complex arrangement of property management in the Seaport, where Massport and the Boston Planning and Redevelopment Authority overlap in overseeing billions of dollars in development and economic activity.

Last week, the board selected Richard Davey to replace former CEO Lisa Wieland, who left for a job in private industry last year.

Davey currently works as president of the Metropolitan Transportation Authority in New York City, but the former Back Bay resident previously ran the MBTA in 2010 and 2011 and served as Department of Transportation Secretary under former Governor Deval Patrick from 2011 to 2014.

The new CEO will oversee operations at Logan Airport, Hanscom Field and Worcester Regional Airport, as well as ports in Boston.

That means the massive operations in the Seaport, including the Boston Fish Pier, Flynn Boston Cruiseport and the Conley Container Terminal, covering more than 400 acres on land and sea.

But the Seaport is also the province of the BPDA, which controls large development in the area and also owns significant chunks of land. While Massport owns 25 acres of the Raymond L. Flynn Marine Park, the BPDA's Economic Development and Industrial Corporation controls the rest of that area.

"The BPDA and Massport have collaborated on the planning and buildout of the South Boston Waterfront District including the alignment of planning visions, Seaport Public Realm Plan and Commonwealth Flats Master Plan," BPDA spokesperson Brittany Comak said in a statement.

"The BPDA informs urban design, transportation, and climate resilience of nonport related projects on Massport property. This partnership continues into the [Raymond L. Flynn Marine Park] where Massport leases BPDA property and operates adjacent port facilities including the Cruise Terminal."

Besides the Marine Park land and water, Massport owns property in several areas in the Seaport. It owns about 11 acres in the middle of the region, in plots around the Mass Pike. It owns 25 acres around E Street, Summer Street and Pappas Way. And it owns 61 acres on the south side of the Reserved Channel, covering the Conley Terminal.

And as a property owner, Massport also leases space to developers. Pappas Enterprises and Oxford Properties are planning to develop a mixed-use project on six acres off Pappas Way, according to filings with the BPDA, and Oxford Properties has already developed lab space on Massport's Summer Street holdings.

"Massport’s real estate portfolio in South Boston includes both commercial mixed-use office, hotel, residential, and maritime industrial properties,” according to Massport spokesperson Jennifer Mehigan.

“Massport manages these assets around three objectives: support Massport’s maritime mission, both financially and operationally, stimulate economic development for the Commonwealth and local communities by stimulating jobs, tax payments, etc., and create accessible and inclusive spaces and events on its waterfront property," The agency has four hotels and three residential projects under lease in addition to its pier and port activities.

The Seaport's transformation from industrial area to a mix of industry, residences, office, lab and recreation space means many groups are invested in the region. Massport works with various agencies to meet everyone's goals, Mehigan said, "Massport and the City, as well as various State partners, share the goal of meeting the needs of multiple stakeholders and industries located within the South Boston Waterfront. For several decades, Massport has worked with the BPDA to plan for the buildout of the South Boston Waterfront toward this end," Mehigan said.

"Massport and the BPDA, along with relevant State agencies, meet regularly to discuss policies and projects in the Raymond Flynn Marine Park. Massport’s particular interests in the park focus on supporting the growing demand for cruise operations at Flynn Cruiseport Boston, promoting the well-established South Boston seafood industry cluster, and protecting and improving essential truck routes serving the port."