All three are internal appointments, with Smith having joined in 2019 as business development manager (BDM), becoming national sales manager in May 2020 and head of sales in June 2021.
Allison joined Roma as head of transformational change in May 2021 from Together, where he worked for 13 of his outstanding 21 years in the finance industry.
Meanwhile, Severs has been with the business for just over one year, having joined as financial controller.
Scott Marshall, managing director at Roma Finance, said: “I have said this before, but I have never been as excited about the future of Roma as I am right now.
“We have fantastic people in every department and this is the perfect time to create this organisational structure with inspirational and innovative leaders.
“Steve, Michael and Matt have all demonstrated their skills and commitment to the business and this is largely why we are now in such a fantastic position.”
Smith added: “I am thrilled to have been given this next opportunity within the business.
“We are all focussed on delivering the best possible experience for everyone who works with us, and we are all aligned in our goals and what we want the business, our partners, our customers and our team to achieve.
“It is a very exciting time to be at Roma.”