I am a native German and English speaker and can offer translations of these languages, German to English as well as English to German.
I have grown up speaking both of these languages fluently as well as attended schools where lessons were instructed in both, giving me fluent speaking, speaking, reading, and writing abilities in both German and English.
I have also tutored in both languages.
I have been a part of the content creation for German language examinations. This included editing scripts in both languages and reading prompts in German.