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US: Summit Materials has appointed Noel R Ryan III as its new Vice President, Investor Relations. Ryan has more than 15 years’ experience in the investor relations and capital markets industries, most recently serving as Vice President and Head of Investor Relations & External Communications for Calumet Specialty Products Partners, a publicly traded producer of specialty hydrocarbon and fuels products.

Previously, Ryan served as head of the investor relations function at Delek US Holdings and as head of corporate communications at QEP Resources. Prior to these roles, he was Executive Director and Co-Head of the Financial Communications Practice Group at a nationally-ranked investor relations consultancy. Ryan began his career in US equities research at Banc of America Securities. He holds a Bachelors of Arts degree from the University of California, Berkeley.

Russia: Arpad Farkas has been appointed general director of Lipetskcement, part of the Eurocement Group. Farkas previously ran a cement plant for Lafarge.

US: Eagle Materials has appointed George Damiris to its board of directors. Damiris is the chief executive officer and president of HollyFrontier Corporation. He also serves as a director at HollyFrontier and Holly Logistics Services.

Ireland: Rebecca McDonald has resigned from the board of CRH with immediate effect. The non-executive director for the building materials producer cited family commitments as her reason for resigning.

Kenya: ARM Cement has appointed John Ngumi, Pepe Meijer and Ketso Gordhan as non-executive directors of the company. They replace Atul Mathur, Michael Turner and Daniel Ndonye, who have resigned as directors following an extraordinary general meeting of shareholders held on 26 August 2016.

John Ngumi holds a BA degree in Philosophy, Politics and Economics from the University of Oxford, UK. He started his banking career at National Westminster Bank, London and has since worked variously for Grindlays Bank, Barclays Bank, Citibank and CfC Stanbic Bank/Standard Bank of South Africa. In between he also co-founded one of Africa's first indigenous investment banking groups, Loita Capital Partners. Ngumi left CfC Stanbic Bank in 2015 upon his appointment by President Uhuru Kenyatta as non executive chair of the Board of Directors, Kenya Pipeline Company Limited.

Pepe Meijer is a Commonwealth Development Corporation (CDC) Advisor and former Managing director for PPC International up-to November 2015. During his PPC tenure Meijer also held various Executive, General, Senior and Middle management positions across PPC’s cement operations that spanned over 28 years. Prior to joining PPC, he worked in the gold mining industry as section engineer and in the fishing/processing /frozen-food industry as group projects manager.

Ketso Gordhan joined CDC in April 2016 as the Head of Africa. He previously spent several years as Chief Executive Officer of PPC Cement, South Africa’s largest cement company. At PPC, Gordhan led the expansion of the company into sub-Saharan Africa, helping build the footprint outside South Africa into Democratic Republic of the Congo, Rwanda, Ethiopia and Zimbabwe. Before PPC, Gordhan spent almost 10 years leading RMB’s private equity business. He has also held a number of public sector roles, including City Manager of Johannesburg and Director General of the Ministry of Transport, where he led major infrastructure projects, such as the South Africa’s N4 Toll Road.