diff --git a/FabApprovalWorkerService/Services/ECNService.cs b/FabApprovalWorkerService/Services/ECNService.cs
index dafa272..be814b3 100644
--- a/FabApprovalWorkerService/Services/ECNService.cs
+++ b/FabApprovalWorkerService/Services/ECNService.cs
@@ -7,6 +7,7 @@ namespace FabApprovalWorkerService.Services;
 public interface IECNService {
     Task<IEnumerable<ECN>> GetExpiringTECNs();
     Task<IEnumerable<ECN>> GetExpiredTECNs();
+    Task<IEnumerable<string>> GetTECNNotificationUserEmails();
 }
 
 public class ECNService : IECNService {
@@ -75,4 +76,24 @@ public class ECNService : IECNService {
             throw;
         }
     }
+
+    public async Task<IEnumerable<string>> GetTECNNotificationUserEmails() {
+        try {
+            _logger.LogInformation("Attempting to get TECN notification user emails");
+
+            string sql = "select u.Email from TECNNotificationsUsers t join Users u on t.UserId = u.UserID;";
+
+            IEnumerable<string> tecnNotificationUserEmails = (await _dalService.QueryAsync<string>(sql)).ToList();
+
+            _logger.LogInformation($"Found {tecnNotificationUserEmails.Count()} TECN notification user emails");
+
+            return tecnNotificationUserEmails;
+        } catch (Exception ex) {
+            StringBuilder errMsgBuilder = new();
+            errMsgBuilder.Append("An exception occurred when attempting to get TECN notification user emails. ");
+            errMsgBuilder.Append($"Exception: {ex.Message}");
+            _logger.LogError(errMsgBuilder.ToString());
+            throw;
+        }
+    }
 }
diff --git a/FabApprovalWorkerService/Services/UserService.cs b/FabApprovalWorkerService/Services/UserService.cs
index 12f085c..b5a53f7 100644
--- a/FabApprovalWorkerService/Services/UserService.cs
+++ b/FabApprovalWorkerService/Services/UserService.cs
@@ -1,7 +1,5 @@
 using FabApprovalWorkerService.Models;
 
-using NLog.Filters;
-
 using System.Text;
 
 namespace FabApprovalWorkerService.Services;
@@ -20,6 +18,7 @@ public interface IUserService {
     Task<bool> RemoveOOOFlagForUser(int userId);
     Task<bool> SetOOOTempProcessed(OOOTemp oOOTemp);
     Task<List<User>> GetAllExpiredOOOUsersAsync();
+    Task<string> GetUserEmail(int userId);
 }
 
 public class UserService : IUserService {
@@ -341,4 +340,27 @@ public class UserService : IUserService {
             throw;
         }
     }
+
+    public async Task<string> GetUserEmail(int userId) {
+        try {
+            if (userId <= 0) throw new ArgumentException($"User Id {userId} is not a valid user Id");
+
+            _logger.LogInformation($"Attempting to get email for user {userId}");
+
+            string sql = $"select Email from Users where UserID = {userId}";
+
+            string? userEmail = (await _dalService.QueryAsync<string>(sql)).ToList().FirstOrDefault();
+
+            if (userEmail is null)
+                throw new Exception($"No email found for user {userId}");
+
+            return userEmail;
+        } catch (Exception ex) {
+            StringBuilder errMsgBuilder = new();
+            errMsgBuilder.Append($"An exception occurred when attempting to get email for user {userId}. ");
+            errMsgBuilder.Append($"Exception: {ex.Message}");
+            _logger.LogError(errMsgBuilder.ToString());
+            throw;
+        }
+    }
 }
diff --git a/FabApprovalWorkerService/Workers/ExpiringTECNWorker.cs b/FabApprovalWorkerService/Workers/ExpiringTECNWorker.cs
new file mode 100644
index 0000000..1140e83
--- /dev/null
+++ b/FabApprovalWorkerService/Workers/ExpiringTECNWorker.cs
@@ -0,0 +1,86 @@
+using FabApprovalWorkerService.Models;
+using FabApprovalWorkerService.Services;
+
+using Quartz;
+
+using System.Net.Mail;
+using System.Text;
+
+namespace FabApprovalWorkerService.Workers;
+
+public class ExpiringTECNWorker : IJob {
+    private readonly ILogger<ExpiringTECNWorker> _logger;
+    private readonly IMonInWorkerClient _monInClient;
+    private readonly IUserService _userService;
+    private readonly IECNService _ecnService;
+    private readonly ISmtpService _smtpService;
+
+    public ExpiringTECNWorker(ILogger<ExpiringTECNWorker> logger,
+                              IMonInWorkerClient monInClient,
+                              IUserService userService,
+                              IECNService ecnService,
+                              ISmtpService smtpService) {
+        _logger = logger ??
+            throw new ArgumentNullException("ILogger not injected");
+        _monInClient = monInClient ??
+            throw new ArgumentNullException("IMonInWorkerClient not injected");
+        _userService = userService ??
+            throw new ArgumentNullException("IUserService not injected");
+        _ecnService = ecnService ??
+            throw new ArgumentNullException("IECNService not injected");
+        _smtpService = smtpService ??
+            throw new ArgumentNullException("ISmtpService not injected");
+    }
+
+    public async Task Execute(IJobExecutionContext context) {
+        DateTime start = DateTime.Now;
+        bool isInternalError = false;
+        StringBuilder errorMessage = new();
+        string metricName = "ExpiringTECNWorker";
+
+        try {
+            _logger.LogInformation("Attempting to notify users of expiring TECNs");
+
+            IEnumerable<ECN> expiringTECNs = await _ecnService.GetExpiringTECNs();
+
+            foreach (ECN eCN in expiringTECNs) {
+                string recipientEmail = await _userService.GetUserEmail(eCN.OriginatorID);
+                MailAddress recipientAddress = new MailAddress(recipientEmail);
+                List<MailAddress> recipientList = new () { recipientAddress };
+                
+                IEnumerable<string> tecnNotificationUserEmails = await _ecnService.GetTECNNotificationUserEmails();
+                List<MailAddress> ccRecipientList = new();
+                foreach (string email in tecnNotificationUserEmails) {
+                    ccRecipientList.Add(new MailAddress(email));
+                }
+
+                StringBuilder bodyBuilder = new();
+                bodyBuilder.Append($"Good day, TECN# {eCN.ECNNumber} will be expiring in ");
+                bodyBuilder.Append($"{(eCN.ExpirationDate - DateTime.Now).Days} ");
+                bodyBuilder.Append($"on {eCN.ExpirationDate.ToString("MMMM dd, yyyy")}. ");
+                bodyBuilder.Append($"<br /> Review TECN <a href='https://mesaapproval.mes.com/ECN/Edit?IssueID={eCN.ECNNumber}'> ");
+                bodyBuilder.Append("here </a>");
+
+                string subject = $"Notice of expiring TECN - {eCN.Title}";
+
+                await _smtpService.SendEmail(recipientList, ccRecipientList, subject, bodyBuilder.ToString());
+            }
+        } catch (Exception ex) {
+            StringBuilder errMsgBuilder = new();
+            errMsgBuilder.Append("An exception occurred when attempting to notify users of expiring TECNs. ");
+            errMsgBuilder.Append($"Exception: {ex.Message}");
+            _logger.LogError(errMsgBuilder.ToString());
+            isInternalError = true;
+        } finally {
+            DateTime end = DateTime.Now;
+            double latencyInMS = (end - start).TotalMilliseconds;
+            _monInClient.PostAverage(metricName + "Latency", latencyInMS);
+
+            if (isInternalError) {
+                _monInClient.PostStatus(metricName, StatusValue.Critical);
+            } else {
+                _monInClient.PostStatus(metricName, StatusValue.Ok);
+            }
+        }
+    }
+}
diff --git a/FabApprovalWorkerServiceTests/ECNServiceTests.cs b/FabApprovalWorkerServiceTests/ECNServiceTests.cs
index 1c66e80..cd54a0d 100644
--- a/FabApprovalWorkerServiceTests/ECNServiceTests.cs
+++ b/FabApprovalWorkerServiceTests/ECNServiceTests.cs
@@ -142,7 +142,6 @@ internal class ECNServiceTests {
         Assert.That(actual.Count(), Is.EqualTo(3));
     }
 
-    // Test when responses include extension dates
     [Test]
     public async Task GetExpiringTECNsWithExtensionsFromDbShouldReturnSameResults() {
         IEnumerable<ECN> ecns = new List<ECN>() {
@@ -214,4 +213,29 @@ internal class ECNServiceTests {
 
         Assert.That(actual.Count(), Is.EqualTo(2));
     }
+
+    [Test]
+    public async Task GetTECNNotificationUserEmailsDbErrorShouldThrowException() {
+        _mockDalService.Setup(d => d.QueryAsync<string>(It.IsAny<string>())).Throws(new Exception());
+
+        _ecnService = new ECNService(_mockLogger.Object, _mockDalService.Object);
+
+        Assert.ThrowsAsync<Exception>(async Task () => await _ecnService.GetTECNNotificationUserEmails());
+    }
+
+    [Test]
+    public async Task GetTECNNotificationUserEmailsShouldReturnExpectedUserEmails() {
+        IEnumerable<string> userEmails = new List<string>() { 
+            "fake1@email.com",
+            "fake2@email.com"
+        };
+
+        _mockDalService.Setup(d => d.QueryAsync<string>(It.IsAny<string>())).Returns(Task.FromResult(userEmails));
+
+        _ecnService = new ECNService(_mockLogger.Object, _mockDalService.Object);
+
+        IEnumerable<string> actualEmails = await _ecnService.GetTECNNotificationUserEmails();
+
+        Assert.That(actualEmails.Count(), Is.EqualTo(2));
+    }
 }
diff --git a/FabApprovalWorkerServiceTests/UserServiceTests.cs b/FabApprovalWorkerServiceTests/UserServiceTests.cs
index 9e81522..2f08813 100644
--- a/FabApprovalWorkerServiceTests/UserServiceTests.cs
+++ b/FabApprovalWorkerServiceTests/UserServiceTests.cs
@@ -443,4 +443,33 @@ internal class UserServiceTests {
 
         Assert.False(actual);
     }
+
+    [Test]
+    public void GetUserEmailWithInvalidUserIdShouldThrowException() {
+        _userService = new UserService(MOCK_LOGGER, _mockDalService.Object);
+
+        Assert.ThrowsAsync<ArgumentException>(async Task() => await _userService.GetUserEmail(-1));
+    }
+
+    [Test]
+    public void GetUserEmailWithDbErrorShouldThrowException() {
+        _mockDalService.Setup(d => d.QueryAsync<string>(It.IsAny<string>())).Throws(new Exception());
+
+        _userService = new UserService(MOCK_LOGGER, _mockDalService.Object);
+
+        Assert.ThrowsAsync<Exception>(async Task() => await _userService.GetUserEmail(3));
+    }
+
+    [Test]
+    public async Task GetUserEmailShouldReturnExpectedEmail() {
+        IEnumerable<string> emailsFromDb = new List<string>() { "user@email.com" };
+
+        _mockDalService.Setup(d => d.QueryAsync<string>(It.IsAny<string>())).Returns(Task.FromResult(emailsFromDb));
+
+        _userService = new UserService(MOCK_LOGGER, _mockDalService.Object);
+
+        string actualEmail = await _userService.GetUserEmail(5);
+
+        Assert.That(actualEmail, Is.EqualTo(emailsFromDb.First()));
+    }
 }
\ No newline at end of file