diff --git a/src/Application/Departments/Queries/GetDepartmentById.cs b/src/Application/Departments/Queries/GetDepartmentById.cs
index e4120c64..83f3f725 100644
--- a/src/Application/Departments/Queries/GetDepartmentById.cs
+++ b/src/Application/Departments/Queries/GetDepartmentById.cs
@@ -1,5 +1,9 @@
+using Application.Common.Interfaces;
 using Application.Common.Models.Dtos;
+using Application.Common.Models.Dtos.Physical;
+using AutoMapper;
 using MediatR;
+using Microsoft.EntityFrameworkCore;
 
 namespace Application.Departments.Queries;
 
@@ -9,4 +13,28 @@ public record Query : IRequest<DepartmentDto>
     {
         public Guid DepartmentId { get; init; }
     }
+    public class QueryHandler : IRequestHandler<Query, DepartmentDto>
+    {
+        private readonly IApplicationDbContext _context;
+        private readonly IMapper _mapper;
+
+        public QueryHandler(IApplicationDbContext context, IMapper mapper)
+        {
+            _context = context;
+            _mapper = mapper;
+        }
+
+        public async Task<DepartmentDto> Handle(Query request, CancellationToken cancellationToken)
+        {
+            var department = await _context.Departments.FirstOrDefaultAsync(x => x.Id.Equals(request.DepartmentId), cancellationToken);
+
+            if (department is null)
+            {
+                throw new KeyNotFoundException("Department does not exist.");
+            }
+
+            return _mapper.Map<DepartmentDto>(department);
+        }
+    }
+    
 }
\ No newline at end of file
diff --git a/tests/Application.Tests.Integration/Departments/Queries/GetDepartmentByIdTests.cs b/tests/Application.Tests.Integration/Departments/Queries/GetDepartmentByIdTests.cs
new file mode 100644
index 00000000..af7d9df8
--- /dev/null
+++ b/tests/Application.Tests.Integration/Departments/Queries/GetDepartmentByIdTests.cs
@@ -0,0 +1,52 @@
+using Application.Departments.Queries;
+using FluentAssertions;
+using Xunit;
+
+namespace Application.Tests.Integration.Departments.Queries;
+
+public class GetDepartmentByIdTests : BaseClassFixture
+{
+    public GetDepartmentByIdTests(CustomApiFactory apiFactory) : base(apiFactory)
+    {
+    }
+
+    [Fact]
+    public async Task ShouldReturnDepartment_WhenThatDepartmentExists()
+    {
+        // Arrange
+        var department = CreateDepartment();
+
+        await AddAsync(department);
+
+        var query = new GetDepartmentById.Query()
+        {
+            DepartmentId = department.Id,
+        };
+        
+        // Act
+        var result = await SendAsync(query);
+        
+        // Assert
+        result.Name.Should().Be(department.Name);
+        
+        // Cleanup
+        Remove(department);
+    }
+
+    [Fact]
+    public async Task ShouldThrowNotFoundException_WhenThatDepartmentDoesNotExist()
+    {
+        // Arrange
+        var query = new GetDepartmentById.Query()
+        {
+            DepartmentId = Guid.NewGuid(),
+        };
+        
+        // Act
+        var action = async () => await SendAsync(query);
+        
+        // Assert
+        await action.Should().ThrowAsync<KeyNotFoundException>()
+            .WithMessage("Department does not exist.");
+    }
+}
\ No newline at end of file