Weeks will be responsible for driving the ETF exchange strategy, business development and co-ordinating with all parties involved.
He joins from UBS where he ran the securities lending franchise in Zurich.
ETF Securities is a provider of exchange traded commodities and exchange traded funds with assets under management totalling £7.3bn, up over 100 per cent since November 2008.
ETF Securities chairman Graham Tuckwell says: “We are delighted to announce the appointment of someone of Mark’s calibre and experience. He brings a wealth of experience to the business and brings an important to new dimension to our team with his expertise in the field of securities finance.”