During October 2024, McCleeary developed and maintained cryptographic utilities for the GaloisInc/ckzg-eip-4844-verification and GaloisInc/cryptol-specs repositories. They built a blob validation utility to ensure BLS modulus compliance, converting blobs to field elements and reconstructing them after applying the modulus, which improved EIP-4844 verification reliability. McCleeary expanded KZG proof verification test vectors, aligning test data across repositories to enhance cross-repo consistency. Using Python and Cryptol, they also removed outdated SphincsPlus code and updated documentation, streamlining onboarding and module usage. Their work demonstrated depth in cryptographic implementation, code maintenance, and test automation, resulting in more robust and maintainable verification pipelines.