Robert "Bob" Sink was born on October 17, 1942 in Urbana, Illinois, and was the only child of Robert W. and Margaret H. Sink. Robert graduated from the Urbana High School in the class of 1960. From there he attended Southern Illinois University in Carbondale, IL, receiving a bachelor's degree in 1965 in radio and television with a double minor in photography and art.
Sink was employed upon graduation by a local television station in Wassau, WI for the first six months of his professional career. He left Wassau to work at WFRV-TV in Green Bay at the outset of 1966 where he wrote, directed, produced, filmed and edited local commercials and produced and directed a local game show for high school students until 1972. In 1972 he began working with the local station for the University of Wisconsin at Green Bay where he was a production manager, producer and developer of educational programming. The programming was some of the first in the nation designed to be used across the state educational system as specific teaching tools for the classroom. He continued in this capacity until 1977.
Beginning in 1977, Sink was employed at Brigham Young University as an instructor and administrative staff member. He taught classes, worked as the KBYU business manager, was a producer/director for KBYU-TV, and was a line producer and the ParkerVision operator. In his time at BYU he also helped design the curriculum and course sequence for the Broadcasting Production major. He retired from BYU in 2000.
While at BYU, Sink also did freelance work and owned and operated RHS Enterprises, Inc, from which he produced and/or directed many national-scale projects. In this capacity, he worked with such widely known programs as, The Donnie and Marie Show (1978-1980), Several one hour specials for ABC, The Donna Fargo Show (1979), Villa Alegre (1981), The Booth (1983), Dick Van Dyke: Magic Comedy Hour (1984), Velveteen Rabbit (1984), Steadfast Tin Soldier (1985), the 7 Habits of Highly Successful People video series (1986), Families are Forever with Richard and Linda Eyre (1989-1990), Principle Centered Leadership video series (1995), and the PBS series Innovators (2000). Outside of television shows and special production Robert has also produced, directed, or worked as technical director for many television commercials. Companies with which he has worked include Sears, Toyota and Chevrolet.
He also served as the director for the LDS General Conference sessions from 1988 to 1994 and the director for Music and the Spoken Word from 1988 to 1993. Sink was a member of the Mormon Tabernacle Choir from 1993 to 2003.
Sink married Beverly Jean in Hoopeston, IL on March 22, 1963. They raised six children together, three boys and three girls. They now have nineteen grandchildren and seven great-grandchildren.