Peterborough MP Stewart Jackson has been appointed Parliamentary Private Secretary to David Davis - the minister for Exiting the European Union.
Mr Jackson was a a leading campaigner for the Leave Campaign in the EU Referendum.
He will assist Mr Davis in negotiating the UK's exit from the EU.
Mr Jackson tweeted that he was "delighted" with his new role.
Delighted to have been appointed Parliamentary Private Secretary to the Secretary of State for Exiting the EU, Rt Hon David Davis MP.
Two MPs from Norfolk and Essex have been given special advisory roles in Theresa May's government reshuffle.Read the full story ›
More MPs from the Anglia region have been given new jobs in Theresa May's new government.Read the full story ›
Anglia Late Edition looks back at the most momentous three weeks in recent political history as Britain voted to leave the European Union.Read the full story ›
We looks at who's in and who's out of Prime Minister Theresa May's new cabinet.Read the full story ›
Witham MP Priti Patel has been made International Development Secretary under new Prime Minster Theresa May.
Patel was a prominent leave campaigner during the referendum.
The Essex MP replaces Justine Greening who has now been promoted to Education Secretary.
Patel will be responsible for administering overseas aid and promoting development in developing countries.
Prime Minister Theresa May has given a job to her former rival for the Conservative leadership.
South Northamptonshire MP Andrea Leadsom has been appointed appointed Environment Secretary in the new cabinet.
.@andrealeadsom from potential leader to farms and environment in 3 days. Proper job but...That said, tricky Brexit unscrambling to do
The role was previously held by South West Norfolk MP Liz Truss who was promoted to Justice Secretary earlier today.
Liz Truss has left Downing Street following her appointment as the new Justice Secretary.
She told reporters outside Number 10 she was "very, very pleased" to be given the role.
New Justice Secretary Liz Truss has tweeted her excitement after she was appointed today as part of Theresa May's reshuffle.
The South West Norfolk MP posted that she was "delighted" to be given the opportunity and also added that she couldn't wait to get "stuck in" to her new role.
Delighted to be appointed Secretary of State for Justice and Lord Chancellor. Looking forward to getting stuck in.
Sad to be leaving Defra after two fantastic years. Great team and loved working with farmers, food producers and environmental groups.
The Queen has officially approved the appointment of South West Norfolk MP Liz Truss as the new Justice Secretary.
Truss has also been confirmed as the first female Lord Chancellor, meaning she is the highest officer of the Crown.