gistfile1.txt

function filter_allowed_mime_types( $allowed_mime_types ) {
    if ( 'company_logo' === $field ) {
        $allowed_mime_types = [
            'jpg|jpeg|jpe' => 'image/jpeg',
            'gif'          => 'image/gif',
            'png'          => 'image/png',
        ];
    } else {
        $allowed_mime_types = [
            'jpg|jpeg|jpe' => 'image/jpeg',
            'gif'          => 'image/gif',
            'png'          => 'image/png',
            'pdf'          => 'application/pdf',
            'doc'          => 'application/msword',
            'docx'         => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
            'mp4'         => 'video/mp4',
        ];
    }

    return $allowed_mime_types;
}

add_filter( 'job_manager_mime_types', filter_allowed_mime_types );

I believe the add_filter line (23) is missing single quotes around the filter_allowed_mime_types

Last line should look like this. Correct?
add_filter( 'job_manager_mime_types', 'filter_allowed_mime_types' );

Maybe it helps someone.