diff --git a/src/Altinn.Notifications.Core/Services/ApplicationOwnerConfigService.cs b/src/Altinn.Notifications.Core/Services/ApplicationOwnerConfigService.cs
new file mode 100644
index 00000000..97879275
--- /dev/null
+++ b/src/Altinn.Notifications.Core/Services/ApplicationOwnerConfigService.cs
@@ -0,0 +1,36 @@
+using Altinn.Notifications.Core.Models;
+using Altinn.Notifications.Core.Repository.Interfaces;
+using Altinn.Notifications.Core.Services.Interfaces;
+
+namespace Altinn.Notifications.Core.Services;
+
+/// <summary>
+/// An implementation of <see cref="IApplicationOwnerConfigService"/> with the necessary business logic
+/// to handle application owner specific configuration in the Notifications application.
+/// </summary>
+public class ApplicationOwnerConfigService : IApplicationOwnerConfigService
+{
+    private readonly IApplicationOwnerConfigRepository _applicationOwnerConfigRepository;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ApplicationOwnerConfigService"/> class.
+    /// </summary>
+    /// <param name="applicationOwnerConfigRepository">A repository implementation</param>
+    public ApplicationOwnerConfigService(IApplicationOwnerConfigRepository applicationOwnerConfigRepository)
+    {
+        _applicationOwnerConfigRepository = applicationOwnerConfigRepository;
+    }
+
+    /// <inheritdoc/>
+    public async Task<ApplicationOwnerConfig> GetApplicationOwnerConfig(string orgId)
+    {
+        return await _applicationOwnerConfigRepository.GetApplicationOwnerConfig(orgId) 
+            ?? new ApplicationOwnerConfig(orgId);
+    }
+
+    /// <inheritdoc/>
+    public async Task WriteApplicationOwnerConfig(ApplicationOwnerConfig applicationOwnerConfig)
+    {
+        await _applicationOwnerConfigRepository.WriteApplicationOwnerConfig(applicationOwnerConfig);
+    }
+}
diff --git a/src/Altinn.Notifications.Core/Services/Interfaces/IApplicationOwnerConfigService.cs b/src/Altinn.Notifications.Core/Services/Interfaces/IApplicationOwnerConfigService.cs
new file mode 100644
index 00000000..9fc07fc5
--- /dev/null
+++ b/src/Altinn.Notifications.Core/Services/Interfaces/IApplicationOwnerConfigService.cs
@@ -0,0 +1,25 @@
+using Altinn.Notifications.Core.Models;
+
+namespace Altinn.Notifications.Core.Services.Interfaces;
+
+/// <summary>
+/// This interface is a description of an application owner configuration service implementation.
+/// Such a service will be required to have methods needed to register, change and retrieve application
+/// owner configuration.
+/// </summary>
+public interface IApplicationOwnerConfigService
+{
+    /// <summary>
+    /// Get the full set of configuration options for a specified application owner.
+    /// </summary>
+    /// <param name="orgId">The unique id of an application owner.</param>
+    /// <returns>A <see cref="Task{ApplicationOwnerConfig}"/> representing the result of the asynchronous operation.</returns>
+    Task<ApplicationOwnerConfig> GetApplicationOwnerConfig(string orgId);
+
+    /// <summary>
+    /// Write a full <see cref="ApplicationOwnerConfig"/> object to storage.
+    /// </summary>
+    /// <param name="applicationOwnerConfig">The configuration object to write to storage.</param>
+    /// <returns>A <see cref="Task"/> representing the result of the asynchronous operation.</returns>
+    Task WriteApplicationOwnerConfig(ApplicationOwnerConfig applicationOwnerConfig);
+}
diff --git a/test/Altinn.Notifications.Tests/Notifications.Core/TestingServices/ApplicationOwnerConfigServiceTests.cs b/test/Altinn.Notifications.Tests/Notifications.Core/TestingServices/ApplicationOwnerConfigServiceTests.cs
new file mode 100644
index 00000000..178952e0
--- /dev/null
+++ b/test/Altinn.Notifications.Tests/Notifications.Core/TestingServices/ApplicationOwnerConfigServiceTests.cs
@@ -0,0 +1,74 @@
+using System.Threading.Tasks;
+
+using Altinn.Notifications.Core.Models;
+using Altinn.Notifications.Core.Repository.Interfaces;
+using Altinn.Notifications.Core.Services;
+
+using Moq;
+
+using Xunit;
+
+namespace Altinn.Notifications.Tests.Notifications.Core.TestingServices;
+
+public class ApplicationOwnerConfigServiceTests
+{
+    [Fact]
+    public async Task GetApplicationOwnerConfigTest_Repository_returns_found_config_Service_returns_found_config()
+    {
+        // Arrange
+        const string OrgId = "exists";
+
+        Mock<IApplicationOwnerConfigRepository> repositoryMock = new();
+        repositoryMock.Setup(a => a.GetApplicationOwnerConfig(It.Is<string>(o => o == OrgId)))
+            .ReturnsAsync(new ApplicationOwnerConfig(OrgId));
+
+        ApplicationOwnerConfigService target = new ApplicationOwnerConfigService(repositoryMock.Object);
+
+        // Act
+        var actual = await target.GetApplicationOwnerConfig(OrgId);
+
+        // Assert
+        repositoryMock.VerifyAll();
+
+        Assert.NotNull(actual);
+    }
+
+    [Fact]
+    public async Task GetApplicationOwnerConfigTest_Repository_returns_null_Service_returns_empty_config()
+    {
+        // Arrange
+        const string OrgId = "wrong";
+
+        Mock<IApplicationOwnerConfigRepository> repositoryMock = new();
+        repositoryMock.Setup(a => a.GetApplicationOwnerConfig(It.Is<string>(o => o == OrgId)))
+            .ReturnsAsync((ApplicationOwnerConfig?)null);
+
+        ApplicationOwnerConfigService target = new ApplicationOwnerConfigService(repositoryMock.Object);
+
+        // Act
+        var actual = await target.GetApplicationOwnerConfig(OrgId);
+
+        // Assert
+        repositoryMock.VerifyAll();
+
+        Assert.NotNull(actual);
+    }
+
+    [Fact]
+    public async Task WriteApplicationOwnerConfigTest_Repository_returns_null_Service_returns_empty_config()
+    {
+        // Arrange
+        const string OrgId = "exists";
+
+        Mock<IApplicationOwnerConfigRepository> repositoryMock = new();
+        repositoryMock.Setup(a => a.WriteApplicationOwnerConfig(It.Is<ApplicationOwnerConfig>(c => c.OrgId == OrgId)));
+
+        ApplicationOwnerConfigService target = new ApplicationOwnerConfigService(repositoryMock.Object);
+
+        // Act
+        await target.WriteApplicationOwnerConfig(new ApplicationOwnerConfig(OrgId));
+
+        // Assert
+        repositoryMock.VerifyAll();
+    }
+}