At the Centre for Programmable Photonic Integrated Circuits and Systems (CPPICS), IIT Madras, we carry out the design and simulation of both Photonic Integrated Circuits (PICs) and Electronic Integrated Circuits (EICs) using industry-standard design tools. For PIC design, we utilize the Ansys Lumerical suite for device, circuit, and system-level simulations. For electronic design and device modeling, we employ Cadence Virtuoso and Synopsys Sentaurus TCAD. A key strength of our design ecosystem is the interoperability between Cadence and Ansys Lumerical, enabling seamless electronic-photonic co-design and verification. This integrated workflow allows us to develop, simulate, and optimize complex PIC/EIC systems for applications in communications, sensing, and programmable photonics.