The EOM workflow entails solving the CCSD equations and evaluating the similaritytransformed Hamiltonian ( H) intermediates followed by the computation of EOM energies and amplitudes by iterative diagonalization of the similarity-transformed Hamiltonian using the Davidson algorithm. We extended the routines 36 that compute the intermediates and σvectors (products of the similarity-transformed Hamiltonian acting on EOM trial states) for EOM-IP/EA/SF/EE-CCSD to support calculations in single precision.