Early career By fourteen, Delgado's curiosity led him to a construction site near his home in the
Santa Teresa Hills, where the remains of the
Ohlone people were discovered. This site, which later became the
Rancho de Santa Teresa, was being destroyed despite the presence of archaeologists. Delgado, initially volunteering alone, began mapping, photographing, and recovering artifacts from the site, continuing his efforts through high school. He later assisted in an excavation in 1980. The experience had a significant impact on Delgado, leading him to prepare the nomination papers for the site, which was listed on the
National Register of Historic Places in 1975 as site #75002184. His research notes and materials are archived in the
San Jose Public Library, documenting his early explorations of the nearby foothills. In 1972, Delgado met with San Jose Mayor
Norman Y. Mineta to advocate for changes in laws to protect archaeological sites. Mineta appointed him the San Jose Youth Commission's Liaison to the city's Historical Landmarks Commission. After serving for three years, Mayor
Janet Gray Hayes appointed Delgado as a commissioner in 1976. He also served on the
San Jose Bicentennial Commission and participated in the first inventory of historical and architectural heritage in 1977 and the Santa Clara County Heritage Inventory. While at the
Vancouver Maritime Museum, Delgado returned to university to obtain his Ph.D. in archaeology, receiving the degree in 2006 from
Simon Fraser University. Delgado's early work notably included documenting shipwreck remains and the surrounding environmental conditions exposed by
beach erosion. He was a pioneer in this area of archaeology in the United States, starting with the wrecks of the schooner Neptune and those within the
Golden Gate National Recreation Area.
National Park Service While working for the
National Park Service (NPS) as the first Park Historian for
Golden Gate National Recreation Area (GGNRA) serving from 1979 to 1986, Delgado co-directed the archaeological excavation of Civil War Black Point battery at
Fort Mason with Martin T. Mayer. In 1987, Delgado became the first Maritime Historian of the National Park Service and the founding chief of the NPS maritime preservation program, the National Maritime Initiative (NMI). The NMI at that time functioned as the maritime preservation program for the entire federal government. The Initiative later became known as the NPS Maritime Heritage Program In this role, Delgado oversaw the creation of classification standards and guidelines for preservation and documentation. Delgado was the principal author of the National Register of Historic Places' guidelines for nominating historic ships and shipwrecks and co-authored the National Register Bulletin for nominating historic aids to navigation. Working from the inventory, Delgado applied the criterion of the National Register of Historic Places and the National Historic Landmarks Program to determine which of some 330 large historic vessels were of national significance. Delgado's work led to the nominations of the schooner
Adventuress and the schooner American Eagle. As part of his duties, and with his degree in maritime archaeology, Delgado closely interacted with the National Park Service's Submerged Cultural Resources Center as well as the Chief Archaeologist of the NPS during his tenure with the National Maritime Initiative. This included co-authoring the guidelines for the implementation of the
Abandoned Shipwreck Act of 1987 following a series of national public meetings. Delgado also joined the Submerged Cultural Resources Unit (SCRU); one of his final assignments was co-authoring the first submerged cultural resources assessment for the region where he first worked, the
Golden Gate National Recreation Area,
Point Reyes National Seashore, and the
Gulf of the Farallones National Marine Sanctuary.
NOAA Office of National Marine Sanctuaries After a one-year sabbatical from the NPS, from 1984 to 1985, to attend
East Carolina University, Delgado graduated with a master's degree in Maritime History and Underwater Research. His thesis focused on the Gold Rush steamer Tennessee, located in
Tennessee Cove within the Golden Gate National Recreation Area. He was subsequently assigned by NPS Chief Historian
Edwin C. Bearss to work as a project historian on the
USS Monitor project with the
National Oceanic and Atmospheric Administration (NOAA). That work led to a series of historical and archaeological context studies, and Delgado personally completed the successful nomination for Monitor's designation as one of the first National Historic Landmark shipwrecks in the United States. He subsequently completed the National Historic Landmark studies for the wrecks of USS Arizona and USS Utah at Pearl Harbor. As of 2018, there are only nine
National Historic Landmark shipwrecks or hulks that have been designated by the
Secretary of the Interior. In October 2010, he left INA to become the Director of Maritime Heritage in the Office of National Marine Sanctuaries for the National Oceanic & Atmospheric Administration in Washington, D.C.
Maritime archaeology Following his doctoral graduation in 2006, he was named and remains an Adjunct Member of the Faculty of the Department of Archaeology at
Simon Fraser University. From 2001 to 2006, he hosted and was the team archaeologist on, the popular Canadian-made National Geographic international documentary series. Delgado worked closely with NOAA's Office of Ocean Exploration in the telepresence-enabled archaeological reconnaissance of the wreck of the
SS Coast Trader.
SEARCH, Inc. In 2017, Delgado retired from public service and became the Senior Vice President of SEARCH, Inc., an American cultural resources and archaeological firm.
In the media Delgado has appeared in documentary films since the 1990s to promote archaeology and history. Delgado has appeared as a guest speaker at the TED-inspired EG series in Monterey, and at IdeaCity in Toronto. ==Personal life==