Fred Mallery Packard, 68, a retired international specialist on parks and conservation for the National Park Service who served as the first park director of Fairfax County, died Saturday at his home in Fairfax after a heart attack.

Mr. Packard was born in Rutherford, N.J., and earned a bachelor's degree in ornithology from Harvard University. He did research on bighorn sheep at Rocky Mountain National Park as a National Park Service ranger before earning a master's degree from the University of Colorado.

After serving in the Navy in World War II, he moved to the Washington area to become executive secretary of the National Parks Association.

In 1958, he became the first person to be appointed director of the Fairfax County Park Authority. Besides directing the acquisition of parklands for the county, including Burke Lake Park, he played a major role in the Authority's acquisition of the historic Sully Plantation in Chantilly. He also compiled a list of all national parks and reservations in the jurisdiction of members of the United Nations before resigning in 1961.

Mr. Packard became a specialist in wildlife management for Interior's Bureau of Land Management in 1962. He transferred to the National Park Service as an international specialist two years later.

At the National Park Service, he negotiated an agreement on park use management between this country and Japan and advised the governments of Tanzania, Kenya and Uganda on parks and exhibits. He retired in 1978.

Mr. Packard was a former executive secretary of the Northern Virginia Regional Park Authority. He was a member of the Cosmos Club and many conservation groups, including the Wilderness Society. He was an honorary member of the International Union for Conservation of Nature and Natural Resources.

Survivors include his wife, Jean, and a daughter, Jean, both of Fairfax.