Don Mackenzie possesses expertise in program management, air traffic control, project management, systems engineering, requirements management and 25 more skills. Colleagues describe him as "I have know Don for many years and worked with him on a number of key programmes and projects he was responsible for. He has great levels of resilience and has led large multifunctional teams to get the job done. A great team player who will always seek for solutions to ensure successful outcomes. Very well connected across the industry, makes tough jobs enjoyable, always recognising the strength of a team, extremely collaborative and great to be around. " and "I have worked with Don over many years during which time he has been involved in delivering a number of high value, complex, large scale programmes. As his key internal customer I have always found him a pleasure to work with. He takes time to really listen to what I, as a customer want and always does his best to ensure he delivers. He is comfortable managing in uncertainty and ambiguity, is respected and trusted by his peers and reports and is a very effective communicator at all levels including the Executive and Board. His approach is always highly professional and he understands the value of really connecting with his customer as well leading and supporting his own team. He is personally resilient and, even when times are tough, remains positive, professional and a pleasure to work with. He combines great leadership and interpersonal skills with highly successful delivery performance which has been frequently externally recognised through various awards from the Institute of Engineering and Technology (IET) and Association of Project Management (APM). "