Two lots will run for up to eight years
HS2 is searching for two consultants to carry out management and cost monitoring work worth a combined £230m over the next eight years.
Lot one of the Commercial Delivery and Controls Framework is for a firm to oversee the delivery of work which includes building a new train station at Curzon Street (pictured) in the middle of Birmingham.
The winner for the £125.5m lot will also have to support cost management across the project.
Lot two is worth £104.5m and will see the winning firm carry out commercial management and cost verification services.
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The appointed supplier to each lot will have work packages awarded to it on an ongoing basis.
Firms will only allowed to be appointed to both lots if they are a non-leading partner of a JV in each.
HS2 will invite six candidates to tender for each lot, with assessment weighted 75:25 towards quality over cost. The contracts will last for four years, with a possible extension of another four years.
Interested parties must register their interest by 24 April, with invitations expected to be sent out on 3 July.