By 1940, after securing his education, graduation from high school, and working as a self-employed farmer, he stepped up and registered for the World War II draft on October 16, while living in Baltimore. Although Keller registered for the draft and one article mentioned about talking about the war, there were no service records, mention of service in his obituary, or designation surrounding his tombstone.

Ralph and his wife, Dorothy, hosted the annual class reunion for members of the Millersport High School class of 1929, Sunday, August 3, 1941, at their country home located south of Baltimore. All classmates participated in a 7:00 p.m. dinner, games, and contests throughout the evening. Five years later, the Kellers hosted another reunion in the same manner, Sunday evening, August 11, 1946.

The third Fairfield County Farmers Picnic was held on the Fairgrounds racetrack during current wartime conditions. The Farm Bureau, Grange, which Ralph was a member, sponsored the annual community gathering, which hosted 1,000 Fairfield farmers, their families, and friends. Despite temperatures soaring into the high 90s on Thursday, August 10, 1944, Ralph participated in the Men’s Ball Throwing Contest specified for men over thirty years old.

A trip to Lake Hope was planned for August 24, 1948, from the funds received, totaling $38 ($486.30 in 2024 inflated dollars), from the scrap drive Ralph led along with Dick Boucher, Bob Ramey, and Harold Justice.

Ralph also held influence with the 4-H club as its leader and hosted the third meeting of Thurston Future Farmers in June 1949. Raising funds surfaced on their agenda to sell magazine subscriptions and scrap paper for educational summer trips. Keller led conversations on their livestock projects and World War II. His wife, Dorothy, along with their two daughters, Shirley and Mary, provided a late lunch and served all those in attendance. Later that year in the autumn, the 4-H club held a meeting in the Thurston School cafeteria with members, leaders, and parents. The achievement meeting and dinner led by the Thurston Future Farmers 4-H Livestock Club presented their agenda as president, Dick Boucher, led the meeting. Ralph discussed the dairy and beef cattle projects that occurred earlier in the year as he led the projects. Ralph presented a trophy from the Ohio Brown Swiss Association to David Young and a leader certificate to Boucher. He also distributed checks according to each grade’s achievements. Upon receipt given to 21 boys and girls, Mary Keller received $14.40, which ranked as the highest given out.

In 1952, ballots were sent out to 3,635 Fairfield County farmers in preparation for the Production and Marketing Administration election in the community. The ballot listed Ralph Keller as one of nine aiming for the position in Walnut Township. Those listed, in addition to Ralph, were Harold Fenstermaker, H. B. Hite, Herb Geiger, John Walker, Emerald Soliday, Roy Keller, Jay Scholl, and Paul Leitnaker.

In 1954, Ralph and Dorothy traveled with his former classmates, graduating class of 1929, to Washington D.C. to celebrate the class’s 25th anniversary. They left the Columbus Union Depot at midnight on the Chesapeake & Ohio Railroad streamliner, “The Sportsman,” for Charlottesville, Virginia. During the trip, they visited the homes of former presidents Thomas Jefferson and James Monroe. After a lunch on President Jefferson’s Monticello campus the group took a bus over the Skyline Drive and made their way to Washington. During their trip they enjoyed the famous landmarks of D.C. including the White House, the Capitol building, and took a trip to President Washington’s estate at Mount Vernon.

Ralph served on the Board as the Dairy Service Directors geared up for 1957 plans. The Fairfield County Dairy Service Cooperative held a meeting at the Pickerington High School with the discussion surrounding the importance of testing programs and the rapid growth of the artificial testing program. In February 1959, Ralph Keller assumed his new elected position as Vice President of the Fairfield County Dairy Service Cooperative Association. As Ralph served on the dairy service unit board, he planned to retire at the expiration of his term at the beginning of 1960. The board planned to reorganize itself at the February 10, 1960, meeting. At the meeting on January 25, 1964, at the Millersport High School, Ralph Keller became the newly elected Director of the Fairfield County Holstein Cattle Club.

The Millersport High School class of 1929 planned a trip to the New York World’s Fair. They left on Saturday, August 15, 1964, at 9 a.m. The charter bus arrived in New York City at about noon the next day, Sunday, as they spent the week leading up until Thursday at the Hotel Manhattan. Their itinerary included individual time throughout New York City and at the fair before they left Thursday for Philadelphia at 11 a.m. to sightsee until their arrival at Bedford Springs, Pennsylvania.

Ralph Keller served as the executor of his brother, Glen Eugene Keller’s estate, after he passed away on April 1, 1962. Ralph and Glen both were on the Millersport basketball team along with their brother, Merle.

Ralph lost his wife, Dorothy, on Wednesday evening when she passed away at the Lancaster-Fairfield County Hospital on March 27, 1974.

The summer day, Monday, June 2, 1975, brought Ralph’s life to a close as he passed away, also at the Lancaster-Fairfield County Hospital, a little over a year after he lost his wife. As with his late wife’s funeral, his service was also at the Johnson-McKellar Funeral Home and officiated by Reverend James Melter. Three days after his death, Ralph was laid to rest in the Union cemetery, located in Millersport, Ohio in Row 3.

During his life, Ralph Lester Keller served as a member of the Liberty Union-Thurston School Board, the Central Ohio Milk Producers Association, Holstein Association, and Trinity United Church of Christ, as well as a member of Fairfield Fish and Game Club and Fairfield Grange.