German engineer, male, 48 y/o, low mature voice, fluent in English and German, with professional recording equipment would love to do this project.
Please find my voice samples in my portfolio page here on freelancer at https://www.freelancer.com/u/daufenbach.html (please select item Portfolio on the left hand side to find the samples on the right hand side). Additional samples can be provided upon request (but cannot be attached to this first message here, so pls send me your request).
Please note that German VO tend to be approx. 20% longer than the English equivalent, so you time restrictions might lead to problems if the English version is spoken very quickly.