"Louise will drive the development of our vision for the AM group and will bring out the very best in those she works alongside. "I have every confidence in Louise's ability to keep our customers at the very heart of our business and to find the right opportunities for growth." Louise Callanan is Renishaw's new Director of Additive Manufacturing. Photo via Renishaw. Californian construction start-up Mighty Buildings has announced three new leadership position appointments as the company builds the foundations for its next phase of growth. The firm has hired Russ Atassi as COO, bringing more than 20 years of experience in supply chain, R&D and manufacturing operations from his previous roles at Airbnb, Apple, and Facebook Oculus. Rene Griemens has been appointed as CFO and joins the firm from sustainable air mobility business Volocopter, and Mark Aldrich joins the firm as General Counsel, bringing decades of legal expertise in regulatory compliance, product development, and go-to-market strategies.