Adnan Elgendy developed Parquet I/O support for the apache/systemds repository, enabling both read and write operations for the Parquet file format. He implemented single-threaded and parallel I/O classes in Java, integrating them with the existing data serialization and distributed systems infrastructure. Adnan updated the Types.java file to recognize Parquet as a supported format and created comprehensive tests to validate the new I/O paths. This work addressed SYSTEMDS-2229, enhancing data interoperability and performance for Parquet workflows within Hadoop-based environments. The feature was delivered with attention to integration and reliability, reflecting a focused and technically sound engineering approach over the month.