Over a three-month period, Chris MacDonald contributed to the lowRISC/opentitan and google/fuzztest repositories by modernizing build systems and expanding certificate handling. He migrated opentitan’s build and simulation infrastructure to the C++17 standard using Bazel, unifying compilation flags and improving cross-component compatibility. In fuzztest, he stabilized corpus telemetry collection by refining shard-based triggers in C++. Chris also enhanced opentitan’s certificate management by adding X.509 TBS support to the perso_tlv path, refining error handling for object lookups. His work demonstrated depth in build system configuration, embedded systems, and firmware development, addressing maintainability and future extensibility across complex codebases.