Within the power generation industry there is a need to bring new products to market that support the push towards zero carbon by 2050. Siemens along with other OEMS have already committed to products that will support this goal by the introduction of products that will burn greens fuels including Hydrogen. In addition, it is recognised that the new products that integrated into the new energy production matrix need to be more efficient and flexible to optimally match the applications they are applied to and thus to minimise not only the fuel used but also make best use of the natural resources used in their manufacture and operation. In this research project concepts will be explored that support the specification and design of 'Advanced Small GT Core' and its integration into a 'Modular GT Package'. The Advanced Small GT Core will consider novel GT architectures for GT's in the 5MW to 15MW that can be integrated into a Modular GT Package to provide a flexible efficient solution for the delivery of power and heat in a wide range of applications. Utilising a system engineering approach, the use of advanced green fuel fluids shall be explored to understand viable energy generation targets and thus correlated turbine design and heat generation constraints shall be researched and addressed allowing for the effective design of the aforementioned modular gas turbine system. The research shall also consider how the latest design and manufacturing techniques can be used to overcome some of the know issues and cost barriers to delivery of viable products based on complex cycles.