Complex sentence: Roger is known as a consumer and leaseholder advocate through his industry and Government lobbying campaign to license managing agents and to make them more accountable, thereby protecting the rights of homeowners and leaseholders.
Split into simpler sentences: Roger is known as a consumer and leaseholder advocate through his industry and Government lobbying campaign to license managing agents. He aims to bring about industry change to make managing agents more accountable and protect the rights of homeowners and leaseholders.