Munich project finance partner Dirk Trautmann took the lead for the international firm on the landmark project, which will see the construction of a prison, administration centre and maintenance depot in Burgdorf, in the canton of Berne.
Swiss firm Pestalozzi also acted for the consortium, with managing partner Robert Furter and real estate partner Anne Imhoff leading the team.
The team saw off competition from a group led by Bilfinger Berger to land the 28-year contract, which will see an initial investment of CHF150m (£89m).
Lovells acted for the banking group providing long-term financing for the project, with Frankfurt project finance partner Christian Knütel in a lead role. The bank group was headed by UBS and NIBC, and also featured six local lenders.
PPP partner Bernhardine Kleinhenz led a team from German firm Luther acting on behalf of the procuring authority.