Doris was born in Stoneham, Massachusetts, one of three children born to Robert B. and Norma Heiser Griffin. Although her parents were not musicians, all three children had music lessons and have been active in music. Doris, the only one to pursue a career in music, started piano lessons at age six. By age eight she started playing for elementary school hymn singing and at age twelve became seriously involved in church music.

Doris continued piano lessons while attending Greater Boston Academy and also sang in the GBA Acadettes, a girls' ensemble, and a girls' trio. Both Acadettes director Richard J. Hammond and piano teacher Virginia-Gene Rittenhouse inspired her during these years. Following graduation from the academy in 1954, she enrolled at Atlantic Union College as a nursing major.

At the end of her freshman year, she changed her major to music education with organ as her performance area and Melvin West as her teacher and major professor. She also was deeply involved with the Aeolians, the select choral group, under the direction of Norman J. Roy. She would later reflect on this experience shortly after Roy's death in 1998:

Doris married Myron Krueger, a pre-medicine graduate in 1958 and completed a B.S. in music education in 1959. Following his medical training they settled in Maine where he established a medical practice and she began teaching music at Pine Tree Academy in 1973, after being a mother and music teacher to her two sons, Brendan and Bradley, in their formative years.

For the next 22 years, Krueger inspired students as she developed a highly successful music program at the academy and took several initiatives that positively affected music in the Atlantic Union Conference of SDA. She started the Northern New England Conference Music Clinic in 1981, which continues as a major annual event, and has also served as coordinator of the Atlantic Union Conference Music Clinic on numerous occasions. In 1991, she spent one month at River Plate College in Argentina where she taught organ and started what is thought to be the first handbell choir in that country.

Outside the realm of music education, she has served as the chair of the music committee in the Brunswick Adventist church and of the Northern New England Conference Camp Meeting Music Committee. Additionally, she has served for seventeen years as the Minister of Music at the Falmouth Congregational Church.

Krueger's work at PTA has been recognized with two yearbook dedications, the Zapara Excellence in Teaching Award in 1989, and the Alma McKibben Sabbatical Award in 1992. In spite of the busy schedule she kept while teaching at the academy and serving as a leader in other music activities, she completed an M.Mus. in choral conducting at the University of Maine in 1988, under Dennis Cox.

In 1995, Krueger returned to AUC as a teacher in the music program and director of the Chamber Singers, a position she would hold until 2000. In 1999, she responded to an invitation from International Adventist Musicians Association to contact Norman Roy's students and former colleagues about sharing their memories of him with readers of its publication, Notes. She closed her introduction to the article that presented those responses with the following observation:

Krueger returned to PTA in the fall of 2000, where she continues to teach music in the pre-school program and grades one through twelve as Director of Pine Tree Center for the Arts. She has toured extensively with the Pine Tree Academy Bell Ringers, touring in South America twice, Bermuda twice, Europe five times, and extensively in the U.S. and Canada. Additionally, she has been a choral, band, and handbell clinician numerous times.

Both of her sons have pursued music careers. The older, Brendan, a versatile musician, is a singer, pianist, brass player, and conductor. In addition to serving as principal of PTA, he conducts its band, often plays as an accompanist for the choir, and directs the Pine Tree Coastal Winds, a community band that is part of the Pine Tree Center for the Arts program.

Bradley, a singer, pianist, trumpet player, and conductor, is also a professional musician, a voice teacher at Lake Michigan College, and director of music at the First Presbyterian Church in South Bend, Indiana. Bradley and Brendan are first and second tenors, respectively, in the Voices of Zion Quartet.

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