When Matt Postulka left Arbella Insurance Group as deputy CIO at the start of the COVID-19 pandemic, he didn’t intend to look back. Postulka aspired to become a CIO — and he achieved it, landing a job as CIO and senior vice president of technology and operations at the Federal Reserve Bank of Boston. It made sense to leave Arbella because “there was a great leader in place” and “I was feeling that CIO was several years away,” Postulka explains. He was interested in “doing something a little different,” and leading technology at a quasi-governmental entity where he would be responsible for two …