diff --git a/src/ZB.MOM.WW.ScadaBridge.Commons/Entities/Notifications/NotificationRecipient.cs b/src/ZB.MOM.WW.ScadaBridge.Commons/Entities/Notifications/NotificationRecipient.cs
index ff82a4ed..71ab9d89 100644
--- a/src/ZB.MOM.WW.ScadaBridge.Commons/Entities/Notifications/NotificationRecipient.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.Commons/Entities/Notifications/NotificationRecipient.cs
@@ -8,11 +8,13 @@ public class NotificationRecipient
     public int NotificationListId { get; set; }
     /// <summary>Gets or sets the display name of the recipient.</summary>
     public string Name { get; set; }
-    /// <summary>Gets or sets the recipient's email address.</summary>
-    public string EmailAddress { get; set; }
+    /// <summary>Gets or sets the recipient's email address, or null for non-email recipients.</summary>
+    public string? EmailAddress { get; set; }
+    /// <summary>Gets or sets the recipient's phone number (E.164), or null for non-SMS recipients.</summary>
+    public string? PhoneNumber { get; set; }
 
     /// <summary>
-    /// Initializes a new <see cref="NotificationRecipient"/> with the required fields.
+    /// Initializes a new <see cref="NotificationRecipient"/> with the required fields (email path).
     /// </summary>
     /// <param name="name">Display name of the recipient.</param>
     /// <param name="emailAddress">Email address of the recipient.</param>
@@ -21,4 +23,59 @@ public class NotificationRecipient
         Name = name ?? throw new ArgumentNullException(nameof(name));
         EmailAddress = emailAddress ?? throw new ArgumentNullException(nameof(emailAddress));
     }
+
+    /// <summary>
+    /// Creates an email recipient with the given name and email address; the phone number is left null.
+    /// </summary>
+    /// <param name="name">Display name of the recipient.</param>
+    /// <param name="emailAddress">Email address of the recipient.</param>
+    /// <returns>A new email <see cref="NotificationRecipient"/>.</returns>
+    public static NotificationRecipient ForEmail(string name, string emailAddress)
+    {
+        if (string.IsNullOrWhiteSpace(name))
+        {
+            throw new ArgumentException("Name must not be empty.", nameof(name));
+        }
+
+        if (emailAddress is null)
+        {
+            throw new ArgumentNullException(nameof(emailAddress));
+        }
+
+        return new NotificationRecipient(name, emailAddress);
+    }
+
+    /// <summary>
+    /// Creates an SMS recipient with the given name and phone number; the email address is left null.
+    /// </summary>
+    /// <param name="name">Display name of the recipient.</param>
+    /// <param name="phoneNumber">Phone number (E.164) of the recipient.</param>
+    /// <returns>A new SMS <see cref="NotificationRecipient"/>.</returns>
+    public static NotificationRecipient ForSms(string name, string phoneNumber)
+    {
+        if (string.IsNullOrWhiteSpace(name))
+        {
+            throw new ArgumentException("Name must not be empty.", nameof(name));
+        }
+
+        if (phoneNumber is null)
+        {
+            throw new ArgumentNullException(nameof(phoneNumber));
+        }
+
+        return new NotificationRecipient
+        {
+            Name = name,
+            PhoneNumber = phoneNumber
+        };
+    }
+
+    /// <summary>
+    /// Parameterless constructor used by EF Core materialization and the SMS factory, where the
+    /// contact field is assigned via property setters rather than constructor parameters.
+    /// </summary>
+    private NotificationRecipient()
+    {
+        Name = string.Empty;
+    }
 }
diff --git a/src/ZB.MOM.WW.ScadaBridge.Commons/Entities/Notifications/SmsConfiguration.cs b/src/ZB.MOM.WW.ScadaBridge.Commons/Entities/Notifications/SmsConfiguration.cs
new file mode 100644
index 00000000..7db9f6ad
--- /dev/null
+++ b/src/ZB.MOM.WW.ScadaBridge.Commons/Entities/Notifications/SmsConfiguration.cs
@@ -0,0 +1,38 @@
+namespace ZB.MOM.WW.ScadaBridge.Commons.Entities.Notifications;
+
+public class SmsConfiguration
+{
+    /// <summary>Gets or sets the primary key.</summary>
+    public int Id { get; set; }
+    /// <summary>Gets or sets the Twilio Account SID.</summary>
+    public string AccountSid { get; set; }
+    /// <summary>Gets or sets the Twilio Auth Token (secret), or null when not applicable.</summary>
+    public string? AuthToken { get; set; }
+    /// <summary>Gets or sets the sender phone number (E.164) placed in the From field.</summary>
+    public string FromNumber { get; set; }
+    /// <summary>Gets or sets the Twilio Messaging Service SID used instead of a From number, or null.</summary>
+    public string? MessagingServiceSid { get; set; }
+    /// <summary>Gets or sets the Twilio REST API base URL, or null to use the provider default.</summary>
+    public string? ApiBaseUrl { get; set; }
+    /// <summary>Gets or sets the connection timeout in seconds.</summary>
+    public int ConnectionTimeoutSeconds { get; set; }
+    /// <summary>Gets or sets the maximum number of delivery retries before parking.</summary>
+    public int MaxRetries { get; set; }
+    /// <summary>Gets or sets the delay between retry attempts.</summary>
+    public TimeSpan RetryDelay { get; set; }
+
+    /// <summary>
+    /// Initializes a new <see cref="SmsConfiguration"/> with required fields and sensible defaults
+    /// for the numeric and timeout fields.
+    /// </summary>
+    /// <param name="accountSid">Twilio Account SID.</param>
+    /// <param name="fromNumber">Sender phone number (E.164) for the From field.</param>
+    public SmsConfiguration(string accountSid, string fromNumber)
+    {
+        AccountSid = accountSid ?? throw new ArgumentNullException(nameof(accountSid));
+        FromNumber = fromNumber ?? throw new ArgumentNullException(nameof(fromNumber));
+        ConnectionTimeoutSeconds = 30;
+        MaxRetries = 10;
+        RetryDelay = TimeSpan.FromMinutes(1);
+    }
+}
diff --git a/src/ZB.MOM.WW.ScadaBridge.Commons/Interfaces/Repositories/INotificationRepository.cs b/src/ZB.MOM.WW.ScadaBridge.Commons/Interfaces/Repositories/INotificationRepository.cs
index f95390b0..88c3aa0c 100644
--- a/src/ZB.MOM.WW.ScadaBridge.Commons/Interfaces/Repositories/INotificationRepository.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.Commons/Interfaces/Repositories/INotificationRepository.cs
@@ -101,6 +101,29 @@ public interface INotificationRepository
     /// <returns>A task representing the asynchronous operation.</returns>
     Task DeleteSmtpConfigurationAsync(int id, CancellationToken cancellationToken = default);
 
+    // SmsConfiguration
+    /// <summary>Gets the SMS configuration, or null if none is configured.</summary>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>The SMS configuration, or null if not found.</returns>
+    Task<SmsConfiguration?> GetSmsConfigurationAsync(CancellationToken cancellationToken = default);
+
+    /// <summary>Gets all SMS configurations.</summary>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>A read-only list of SMS configurations.</returns>
+    Task<IReadOnlyList<SmsConfiguration>> GetAllSmsConfigurationsAsync(CancellationToken cancellationToken = default);
+
+    /// <summary>Adds a new SMS configuration.</summary>
+    /// <param name="smsConfiguration">The SMS configuration to add.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>A task representing the asynchronous operation.</returns>
+    Task AddSmsConfigurationAsync(SmsConfiguration smsConfiguration, CancellationToken cancellationToken = default);
+
+    /// <summary>Updates an existing SMS configuration.</summary>
+    /// <param name="smsConfiguration">The SMS configuration to update.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>A task representing the asynchronous operation.</returns>
+    Task UpdateSmsConfigurationAsync(SmsConfiguration smsConfiguration, CancellationToken cancellationToken = default);
+
     /// <summary>Saves pending changes to the repository.</summary>
     /// <param name="cancellationToken">Cancellation token.</param>
     /// <returns>The number of entities saved.</returns>
diff --git a/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Enums/NotificationType.cs b/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Enums/NotificationType.cs
index 432a1f01..4eb4d433 100644
--- a/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Enums/NotificationType.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Enums/NotificationType.cs
@@ -1,9 +1,10 @@
 namespace ZB.MOM.WW.ScadaBridge.Commons.Types.Enums;
 
 /// <summary>
-/// Delivery channel for a notification. Currently only email is supported.
+/// Delivery channel for a notification. Email and SMS are supported.
 /// </summary>
 public enum NotificationType
 {
-    Email
+    Email,
+    Sms
 }
diff --git a/tests/ZB.MOM.WW.ScadaBridge.Commons.Tests/Types/EnumTests.cs b/tests/ZB.MOM.WW.ScadaBridge.Commons.Tests/Types/EnumTests.cs
index ded4e95b..2257f9da 100644
--- a/tests/ZB.MOM.WW.ScadaBridge.Commons.Tests/Types/EnumTests.cs
+++ b/tests/ZB.MOM.WW.ScadaBridge.Commons.Tests/Types/EnumTests.cs
@@ -13,7 +13,7 @@ public class EnumTests
     [InlineData(typeof(AlarmTriggerType), new[] { "ValueMatch", "RangeViolation", "RateOfChange", "HiLo", "Expression" })]
     [InlineData(typeof(ConnectionHealth), new[] { "Connected", "Disconnected", "Connecting", "Error" })]
     [InlineData(typeof(NotificationStatus), new[] { "Pending", "Retrying", "Delivered", "Parked", "Discarded" })]
-    [InlineData(typeof(NotificationType), new[] { "Email" })]
+    [InlineData(typeof(NotificationType), new[] { "Email", "Sms" })]
     public void Enum_ShouldHaveExpectedValues(Type enumType, string[] expectedNames)
     {
         var actualNames = Enum.GetNames(enumType);