What is the fine-grained topic of the following text: Given the complexity of the system, tight site constraints, and design requirements, Parametrix reached out to Contech Engineered Solutions for their assistance as Parametrix was familiar with solutions provided by Contech and confident one could easily be identified that would meet the design requirements for this project. Only return the topic.
Collaboration between Parametrix and Contech Engineered Solutions for a complex project.