Patellis, who will work from New York, will be assisting Montello with a range of strategic projects including assessing the viability of establishing an office for Montello in New York with a view to lending in North America.
The firm is also implementing a range of internal processes which will assist the Montello grow its business.
Before joining Tiuta, Patellis helped to build Preferred Mortgages from a start-up, bring in Barclays Private Equity as a major stakeholder in a deal worth £270m, and see it sold to Lehman Brothers.
Managing director of Montello, Christian Faes, said: “We are excited to have someone of George’s calibre and experience join our team.
“We continue to see our firm recognised as one of the leading short term lenders in the UK, and our flagship Montello Income Fund is largely recognised as the leading real estate bridging finance fund in the market.
“George will be able to bring an invaluable amount of market knowledge and experience to our business, as we continue to expand our capital base and lending capacity into other niche areas such as medium term lending and JV partnerships.”
Patellis added: “Throughout my various discussions with the team at Montello, I was really taken aback with the business that they have been able to develop in their three years since starting up.
“They have gone about developing their loan book, internal processes and their whole business, in a very methodical and mature manner.
“There is a lot of work to be done, but I look forward to working with the Montello team to build a world-class specialist lender. The ability to broaden Montello’s proposition into other areas of lending from my base in New York, is yet another appealing aspect for me.”
