Sutherland will become chief executive of Samaritans in August. She is chief executive of the relationship support charity Relate and will succeed Catherine Johnstone, who announced in January that she would leave the suicide-prevention charity this year.
Craig Bennett has been appointed chief executive of Friends of the Earth. He was formerly its director of policy and campaigns.
Carla Jones has joined Allergy UK as chief executive. She previously managed a specialist palliative care environment at Pilgrims Hospices.
Jane Featherstone is taking over from Claudette Watson as chief executive of the Sick Children's Trust. She was formerly deputy chief executive of the charity, which supports families with children in hospital.
Unicef UK has appointed Lily Caprani as deputy executive director, communications, advocacy and programmes. She joins from the Children's Society, where she was director of strategy and policy.
The Dame Kelly Holmes Trust, which mentors disadvantaged young people, has appointed Emma Atkins as its chief executive. She has been its interim chief executive since January and was previously its director of programmes.
Ryan Campbell has become chief executive of Demelza Hospice Care for Children, which works in Kent, East Sussex and south-east London. He has moved from KCA, a Kent-based substance misuse and mental health charity.
Ross Maloney has joined the UK Scout Association as director of scouting operations. He was previously chief executive of Find a Future.
Belinda Brown has been appointed director of people, planning and performance at Marie Curie. She was director of people, performance and pay at the Independent Parliamentary Standards Authority.
The housing charity Shelter has appointed Alison Mohammed as director of services. She was previously the chief operating officer of Rethink Mental Illness.
Oxfam GB has appointed Laurie Adams to the newly created role of women's rights director. She has worked for the charity in three African regions, most recently as regional director in southern Africa.