Contributed to the Qiskit/qiskit repository by expanding operator compatibility in the evolved_operator_ansatz module, enabling support for SparseObservable and broadening the range of quantum operators that can be handled. Leveraged Python and quantum computing expertise to integrate SparseObservable with the Rust fast path, optimizing performance for large circuits. Addressed edge cases such as empty and identity-only circuits, improving reliability and safety of defaults. Refactored import logic to remove fragile patterns, simplifying future maintenance. Enhanced the testing suite with comprehensive coverage for new functionality, ensuring robust validation. The work focused on maintainable, well-tested code that improves operator handling in quantum workflows.