Mirian is known for shaping HR as a strategic discipline at enterprise level – aligning talent, culture, rewards and leadership to the growth and transformation agendas of global companies. At both Merck and AT&T she played a central role in leadership succession, workforce strategy, culture change and employee engagement at scale, often in the context of restructuring and M&A, technological disruption and shifting stakeholder expectations.

Alongside her executive career, Mirian has built a substantial portfolio of board and professional leadership roles. She serves on the boards of Yum! Brands, Inc. and Booking Holdings, Inc., bringing a distinctive combination of human capital expertise, global perspective and experience in consumer-facing, multi-brand organisations. She sits on the Foundation Board of the Society for Industrial and Organizational Psychology (SIOP), is a Senior Adviser to Jersey Battered Women’s Services (JBWS), and is the CEO of the Massenberg STEM Foundation, reflecting a longstanding commitment to applying her skills in service of both organisational performance and social impact. She has previously chaired the HR Policy Association and the National Academy of Human Resources (NAHR); she was elected an NAHR Fellow in 2001 and a Distinguished Fellow in 2016, the Academy’s highest honour.