HarborOne Credit Union, Brockton, Mass., has named Baffour Nkrumah-Appiah branch officer of the CU's Randolph Branch. Service Credit Union, Portsmouth, N.H., has appointed Kali Buttrick to senior administrative assistant in the Audit department. The CU has also promoted Mary Aylmer to loan service representative, level III and Stephanie Woods to financial services supervisor in the CU's Manchester Branch. First Financial Federal Credit Union, Wall, N.J., has named Helga Britton director of human resources; Robin L. Brunner marketing specialist; Mary Lee Kleinkauf director of project management; Adley Francois vice president of information technology; and Jeffrey D. Zaccaria branch manager. Members 1st Federal Credit Union, Mechanicsburg, Pa., has promoted Eric Hess to branch manager and Deanne Miller to audit manager.