diff --git a/api/Services/PersonService.cs b/api/Services/PersonService.cs
new file mode 100644
index 0000000..318a13e
--- /dev/null
+++ b/api/Services/PersonService.cs
@@ -0,0 +1,69 @@
+using api.Domain;
+using api.DTOs;
+using api.Repositories;
+
+namespace api.Services
+{
+    public class PersonService(IPersonRepository PersonRepository) : IPersonService
+    {
+        private readonly IPersonRepository _personRepository = PersonRepository;
+
+        public async Task AddPersonAsync(PersonDto personDto)
+        {
+            Person person = Person.Create(
+                username: personDto.Username,
+                realName: personDto.RealName,
+                birthday: personDto.Birthday
+            );
+
+            await _personRepository.AddAsync(person);
+        }
+
+        public async Task<IEnumerable<PersonDto>> GetAllPersonsAsync()
+        {
+            IEnumerable<Person> persons = await _personRepository.GetAllAsync();
+
+            return persons.Select(p => new PersonDto
+            {
+                Username = p.Username,
+                RealName = p.RealName,
+                Birthday = p.Birthday
+            });
+        }
+
+        public async Task<PersonDto> GetPersonByUsernameAsync(string username)
+        {
+            Person person = await personExists(username);
+
+            return new PersonDto
+            {
+                Username = person.Username,
+                RealName = person.RealName,
+                Birthday = person.Birthday
+            };
+        }
+
+        public async Task UpdatePersonAsync(string username, PersonDto personDto)
+        {
+
+            await personExists(username);
+
+            Person updatedPerson = Person.Create(username: personDto.Username, realName: personDto.RealName, birthday: personDto.Birthday);
+            await _personRepository.UpdateAsync(updatedPerson);
+        }
+
+        public async Task DeletePersonAsync(string username)
+        {
+            await personExists(username);
+        }
+
+        private async Task<Person> personExists(string username)
+        {
+            Person? person = await _personRepository.GetByUsernameAsync(username);
+            
+            if (person == null) throw new KeyNotFoundException("Person not found");
+            
+            return person;
+        }
+    }
+}
\ No newline at end of file