activity during the next 25 years included James R. Asay, Lynn M. Barker (inventor of the VISAR), Barry M. Butcher, Lalit C. Chhabildas, Robert A. Graham, Charles H. Karnes, Darrell E. Munson, and Karl W. Schuler. The experimental data then had to be incorporated into theoretical constitutive models in order to be used in the computer programs that were under development. Some of the key researchers in this activity included Albert J. Chabai, Peter J. Chen, Lee W. Davison, Douglas S. Drumheller, Dennis B. Hayes, Herrmann, James N. Johnson, Orval E. Jones, and Jace W. Nunziato. Many of these individuals and others were also involved in code simulations applied to pressing national problems. A particularly notable example is the work of Paul Yarrington on missile impact and cratering and warhead contact fusing. Other such contributors included Marlin E. Kipp and Timothy J. Trucano.
Over a period of more than 25 years Herrmann recruited, managed, directed, and led by example an extremely productive and internationally known organization of some 45 to 50 scientists and technicians. In 1982 he was appointed director of engineering sciences—an organization of some 140 technical staff—that, in addition to the aforementioned solid dynamics activities, included general engineering structural analysis and fluid and thermal sciences. In 1992, prior to his retirement in 1993, he was named a Sandia Senior Fellow.
Herrmann died on June 4, 2000, at the age of 71.
Survivors include his children, Inga and Peter, and stepsons, Allan and Jeffrey Gross, all of Albuquerque; a stepdaughter, Janis Gross of Longmont, Colorado; grandchildren Rishar, Mariah, and Joshua; and his former wife, Betty Lorraine Allard Herrmann, of Albuquerque.