Link's early photography was created with a borrowed medium format Autographic Kodak camera. By the time he was in high school he had built his own photographic enlarger. After completing high school, Link attended the Polytechnic Institute of Brooklyn, receiving a degree in civil engineering. Before his graduation in 1937, Link spoke at a banquet for the institute's newspaper, where he served as photo editor. An executive from Carl Byoir's public relations firm was present and was impressed by Link's speaking ability. He offered Link a job as a photographer.
With the war consuming much of the rest of the world and soon to reach the United States, and unable to join the military due to mumps-induced hearing loss, Link left Byoir's employ in 1942 to work for the Airborne Instruments Laboratory, part of Columbia University. Drawing on both his university degree and professional photographic experience, Link worked at the laboratory as both project engineer and photographer. The laboratory was then researching a device for low-flying airplanes to detect submarines underwater. Link's main responsibility was photographing the project for the United States' government.
In 1945, with the end of the war, Link's employment at the Airborne Instruments Laboratory also ended. Byoir invited Link back, but Link instead opened his own studio in New York City in 1946; his clients included Goodrich, Alcoa, Texaco, and Ethyl.
Although it was entirely self-financed, Link's work was encouraged and facilitated by N&W officials, from President Robert Hall Smith downwards. Besides the locomotives, he captured the people of the N&W performing their jobs on the railroad and the trackside communities. Some of his images were of the massive Roanoke Shops, where the company had for long built and maintained its own locomotives.
Link's images were always meticulously set up and posed, and he chose to take most of his railroad photographs at night. He said "I can't move the sun — and it's always in the wrong place — and I can't even move the tracks, so I had to create my own environment through lighting. Although others, including Philip Hastings and Jim Shaughnessy, had photographed locomotives at night before, Link's vision required him to develop new techniques for flash photography of such large subjects. For instance, the movie theater image Hotshot Eastbound (Iaeger, West Virginia), photographed on 2 August 1956 [negative NW1103], used 42 #2 flashbulbs and one #0 fired simultaneously. Link, with an assistant such as George Thom, had to lug all his equipment into position and wire it up: this was done in series so any failure would prevent a picture being taken at all; and in taking night shots of moving trains the right position for the subject could only be guessed at. Link used a 4 x 5 Graphic View view camera with black and white film, from which he produced silver gelatin prints.
Hawksbill Creek Swimming Hole (Luray, Virginia) was photographed on 9 August 1956 [NW1126]. Other widely-known images include Swimming Pool (Welch, West Virginia) (1958 [NW1963]), Ghost Town (Stanley, Virginia) [NW1345], Main Line on Main Street (North Fork, West Virginia) (1958 [NW1966]) and Mr and Mrs Ben Pope watch the last steam powered passenger train (Max Meadows, Virginia) (1957 [NW1648]).
In addition to his black and white night shots, Link also recorded the single daytime train on the Norfolk & Western's hilly Abingdon branch, serving the rural communities from Abingdon, Virginia 55 miles (88 km) south to West Jefferson, North Carolina. It was also on this line that most of his railroad color photography was done; a selection is included in The Last Steam Railroad in America. His familiar 1956 view of a horse and steam locomotive Maud bows to the Virginia Creeper (Green Cove, Virginia) exists in black and white and color versions.
As well as photographing them, Link was also making sound recordings of the trains, which he issued on a set of six gramophone records between 1957 and 1977 under the overall title Sounds of Steam Railroading. In the railfan world he was probably best known by these, and by photographs published in Trains magazine and elsewhere in the 1950s, which inspired others to follow his example. A traveling exhibition in 1983 brought his work to a wider public.
In 1996, Link's second wife, Conchita, was arrested for (and later convicted of) stealing a collection of Link's photographs and attempting to sell them, claiming that Link had Alzheimer's disease and that she had power of attorney. She served six years in prison. After being released, she again attempted to sell some of Link's works that she had stolen, this time using the Internet auction site eBay. She received a three-year sentence. Conchita was also accused of imprisoning her husband. However, this allegation is disputed by some, and it never led to any criminal charges against Conchita.
Link made a cameo appearance as a steam locomotive engineer in the 1999 film October Sky. He was actively involved with the planning of a museum of his work when he died of a heart attack near his home in January 2001.
Nearby in Roanoke is the Virginia Museum of Transportation, which includes a special pavilion constructed to house the static display of the Norfolk & Western J Class 4-8-4 611 and A Class 2-6-6-4 1218 steam locomotives which were operated in excursion service in the 1980s and early 1990s.