diff --git a/java-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/telemetry/v1/DriverEnvironmentBuilder.java b/java-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/telemetry/v1/DriverEnvironmentBuilder.java
new file mode 100644
index 000000000000..2e8fff6cf9f6
--- /dev/null
+++ b/java-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/telemetry/v1/DriverEnvironmentBuilder.java
@@ -0,0 +1,178 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.bigquery.jdbc.telemetry.v1;
+
+import com.google.cloud.bigquery.jdbc.utils.BigQueryJdbcVersionUtility;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.UUID;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/** Utility builder for constructing {@link DriverEnvironment} telemetry protos. */
+final class DriverEnvironmentBuilder {
+  private static final Logger logger = Logger.getLogger(DriverEnvironmentBuilder.class.getName());
+
+  static final String DRIVER_NAME = "google-bigquery-jdbc-driver";
+  static final String CLIENT_LANGUAGE = "java";
+  static final String DEFAULT_TELEMETRY_TAG_DIR = ".bigquery-jdbc";
+  static final String DEFAULT_TELEMETRY_TAG_FILE = "telemetry-tag";
+  static final String UNKNOWN = "unknown";
+  static final String RESTRICTED = "restricted";
+
+  private DriverEnvironmentBuilder() {}
+
+  static DriverEnvironment build() {
+    return build(null);
+  }
+
+  static DriverEnvironment build(Path customTelemetryTagPath) {
+    return DriverEnvironment.newBuilder()
+        .setDriverName(DRIVER_NAME)
+        .setDriverVersion(BigQueryJdbcVersionUtility.getSanitizedDriverVersion())
+        .setClientLanguage(CLIENT_LANGUAGE)
+        .setClientLanguageVersion(getMajorJavaVersion())
+        .setOsType(detectOsType())
+        .setOsVersion(getMajorOsVersion())
+        .setTelemetryTag(getOrCreateTelemetryTag(customTelemetryTagPath))
+        .build();
+  }
+
+  static String getMajorJavaVersion() {
+    try {
+      return getMajorJavaVersion(System.getProperty("java.version"));
+    } catch (SecurityException e) {
+      return RESTRICTED;
+    }
+  }
+
+  static String getMajorJavaVersion(String versionProperty) {
+    if (versionProperty == null || versionProperty.trim().isEmpty()) {
+      return UNKNOWN;
+    }
+    String version = versionProperty.trim();
+    if (version.startsWith("1.")) {
+      // Legacy Java version format (e.g. 1.8.0_292 -> 8)
+      String[] parts = version.split("\\.");
+      if (parts.length >= 2) {
+        return parts[1];
+      }
+    } else {
+      // Modern Java version format (e.g. 11.0.12 -> 11 or 17.0.1 -> 17)
+      int firstDot = version.indexOf('.');
+      if (firstDot > 0) {
+        return version.substring(0, firstDot);
+      }
+    }
+    return version;
+  }
+
+  static DriverEnvironment.OsType detectOsType() {
+    try {
+      return detectOsType(System.getProperty("os.name"));
+    } catch (SecurityException e) {
+      return DriverEnvironment.OsType.OS_TYPE_UNSPECIFIED;
+    }
+  }
+
+  static DriverEnvironment.OsType detectOsType(String osNameProperty) {
+    if (osNameProperty == null || osNameProperty.trim().isEmpty()) {
+      return DriverEnvironment.OsType.OS_TYPE_UNKNOWN;
+    }
+    String osName = osNameProperty.toLowerCase();
+    if (osName.contains("mac") || osName.contains("darwin")) {
+      return DriverEnvironment.OsType.OS_TYPE_MACOS;
+    } else if (osName.contains("win")) {
+      return DriverEnvironment.OsType.OS_TYPE_WINDOWS;
+    } else if (osName.contains("nux") || osName.contains("nix")) {
+      return DriverEnvironment.OsType.OS_TYPE_LINUX;
+    } else if (osName.contains("solaris") || osName.contains("sunos")) {
+      return DriverEnvironment.OsType.OS_TYPE_SOLARIS;
+    } else if (osName.contains("freebsd")) {
+      return DriverEnvironment.OsType.OS_TYPE_FREEBSD;
+    } else if (osName.contains("openbsd")) {
+      return DriverEnvironment.OsType.OS_TYPE_OPENBSD;
+    } else if (osName.contains("netbsd")) {
+      return DriverEnvironment.OsType.OS_TYPE_NETBSD;
+    } else if (osName.contains("aix")) {
+      return DriverEnvironment.OsType.OS_TYPE_AIX;
+    }
+    return DriverEnvironment.OsType.OS_TYPE_UNKNOWN;
+  }
+
+  static String getMajorOsVersion() {
+    try {
+      return getMajorOsVersion(System.getProperty("os.version"));
+    } catch (SecurityException e) {
+      return RESTRICTED;
+    }
+  }
+
+  static String getMajorOsVersion(String osVersionProperty) {
+    if (osVersionProperty == null || osVersionProperty.trim().isEmpty()) {
+      return UNKNOWN;
+    }
+    String version = osVersionProperty.trim();
+    int firstDot = version.indexOf('.');
+    if (firstDot > 0) {
+      return version.substring(0, firstDot);
+    }
+    return version;
+  }
+
+  static String getOrCreateTelemetryTag(Path customFilePath) {
+    try {
+      Path idFilePath = customFilePath;
+      if (idFilePath == null) {
+        String userHome = System.getProperty("user.home");
+        if (userHome == null || userHome.trim().isEmpty()) {
+          return UUID.randomUUID().toString();
+        }
+        idFilePath = Paths.get(userHome, DEFAULT_TELEMETRY_TAG_DIR, DEFAULT_TELEMETRY_TAG_FILE);
+      }
+
+      if (Files.exists(idFilePath)) {
+        try {
+          String content =
+              new String(Files.readAllBytes(idFilePath), StandardCharsets.UTF_8).trim();
+          // Validate existing content is a valid UUID
+          UUID.fromString(content);
+          return content;
+        } catch (Exception e) {
+          logger.log(
+              Level.WARNING, "Failed to read or parse telemetry tag from file, regenerating", e);
+        }
+      }
+
+      String newId = UUID.randomUUID().toString();
+      try {
+        if (idFilePath.getParent() != null) {
+          Files.createDirectories(idFilePath.getParent());
+        }
+        Files.write(idFilePath, newId.getBytes(StandardCharsets.UTF_8));
+      } catch (IOException e) {
+        logger.log(Level.WARNING, "Failed to persist telemetry tag to file", e);
+      }
+      return newId;
+    } catch (SecurityException e) {
+      return UUID.randomUUID().toString();
+    }
+  }
+}
diff --git a/java-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/utils/BigQueryJdbcVersionUtility.java b/java-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/utils/BigQueryJdbcVersionUtility.java
index ece2ad4bd268..ebab86581f87 100644
--- a/java-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/utils/BigQueryJdbcVersionUtility.java
+++ b/java-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/utils/BigQueryJdbcVersionUtility.java
@@ -80,6 +80,14 @@ public static String getDriverVersion() {
     return DRIVER_VERSION;
   }
 
+  /**
+   * Returns a sanitized version of the driver version, containing only the major and minor
+   * components (e.g. "1.2" for "1.2.0-SNAPSHOT").
+   */
+  public static String getSanitizedDriverVersion() {
+    return DRIVER_MAJOR_VERSION + "." + DRIVER_MINOR_VERSION;
+  }
+
   public static int getDriverMajorVersion() {
     return DRIVER_MAJOR_VERSION;
   }
diff --git a/java-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/telemetry/v1/DriverEnvironmentBuilderTest.java b/java-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/telemetry/v1/DriverEnvironmentBuilderTest.java
new file mode 100644
index 000000000000..835db26e08fc
--- /dev/null
+++ b/java-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/telemetry/v1/DriverEnvironmentBuilderTest.java
@@ -0,0 +1,145 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.bigquery.jdbc.telemetry.v1;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.UUID;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+public class DriverEnvironmentBuilderTest {
+
+  @Test
+  public void testBuildDriverEnvironment() {
+    DriverEnvironment env = DriverEnvironmentBuilder.build();
+    assertNotNull(env);
+    assertEquals("google-bigquery-jdbc-driver", env.getDriverName());
+    assertNotNull(env.getDriverVersion());
+    assertEquals("java", env.getClientLanguage());
+    assertNotNull(env.getClientLanguageVersion());
+    assertNotNull(env.getOsType());
+    assertNotNull(env.getOsVersion());
+    assertNotNull(env.getTelemetryTag());
+  }
+
+  @Test
+  public void testBuildDriverEnvironmentCustomTagPath(@TempDir Path tempDir) {
+    Path tagFile = tempDir.resolve("telemetry-tag");
+    DriverEnvironment env = DriverEnvironmentBuilder.build(tagFile);
+    assertNotNull(env);
+    assertEquals("google-bigquery-jdbc-driver", env.getDriverName());
+    assertNotNull(env.getDriverVersion());
+    assertEquals("java", env.getClientLanguage());
+    assertNotNull(env.getClientLanguageVersion());
+    assertNotNull(env.getOsType());
+    assertNotNull(env.getOsVersion());
+    assertEquals(env.getTelemetryTag(), DriverEnvironmentBuilder.getOrCreateTelemetryTag(tagFile));
+  }
+
+  @Test
+  public void testGetMajorJavaVersion() {
+    assertEquals("8", DriverEnvironmentBuilder.getMajorJavaVersion("1.8.0_292"));
+    assertEquals("11", DriverEnvironmentBuilder.getMajorJavaVersion("11.0.12"));
+    assertEquals("17", DriverEnvironmentBuilder.getMajorJavaVersion("17.0.1"));
+    assertEquals("21", DriverEnvironmentBuilder.getMajorJavaVersion("21"));
+    assertEquals("unknown", DriverEnvironmentBuilder.getMajorJavaVersion(null));
+    assertEquals("unknown", DriverEnvironmentBuilder.getMajorJavaVersion("   "));
+  }
+
+  @Test
+  public void testDetectOsType() {
+    assertEquals(
+        DriverEnvironment.OsType.OS_TYPE_WINDOWS,
+        DriverEnvironmentBuilder.detectOsType("Windows 11"));
+    assertEquals(
+        DriverEnvironment.OsType.OS_TYPE_MACOS, DriverEnvironmentBuilder.detectOsType("Mac OS X"));
+    assertEquals(
+        DriverEnvironment.OsType.OS_TYPE_MACOS, DriverEnvironmentBuilder.detectOsType("Darwin"));
+    assertEquals(
+        DriverEnvironment.OsType.OS_TYPE_LINUX, DriverEnvironmentBuilder.detectOsType("Linux"));
+    assertEquals(
+        DriverEnvironment.OsType.OS_TYPE_SOLARIS, DriverEnvironmentBuilder.detectOsType("Solaris"));
+    assertEquals(
+        DriverEnvironment.OsType.OS_TYPE_FREEBSD, DriverEnvironmentBuilder.detectOsType("FreeBSD"));
+    assertEquals(
+        DriverEnvironment.OsType.OS_TYPE_OPENBSD, DriverEnvironmentBuilder.detectOsType("OpenBSD"));
+    assertEquals(
+        DriverEnvironment.OsType.OS_TYPE_NETBSD, DriverEnvironmentBuilder.detectOsType("NetBSD"));
+    assertEquals(
+        DriverEnvironment.OsType.OS_TYPE_AIX, DriverEnvironmentBuilder.detectOsType("AIX"));
+    assertEquals(
+        DriverEnvironment.OsType.OS_TYPE_UNKNOWN,
+        DriverEnvironmentBuilder.detectOsType("UnknownOS"));
+    assertEquals(
+        DriverEnvironment.OsType.OS_TYPE_UNKNOWN, DriverEnvironmentBuilder.detectOsType(null));
+  }
+
+  @Test
+  public void testGetMajorOsVersion() {
+    assertEquals("10", DriverEnvironmentBuilder.getMajorOsVersion("10.0"));
+    assertEquals("6", DriverEnvironmentBuilder.getMajorOsVersion("6.1.0"));
+    assertEquals("5", DriverEnvironmentBuilder.getMajorOsVersion("5"));
+    assertEquals("unknown", DriverEnvironmentBuilder.getMajorOsVersion(null));
+    assertEquals("unknown", DriverEnvironmentBuilder.getMajorOsVersion("  "));
+  }
+
+  @Test
+  public void testGetOrCreateTelemetryTag_CreateNew(@TempDir Path tempDir) {
+    Path tagFile = tempDir.resolve("telemetry-tag");
+    String tag = DriverEnvironmentBuilder.getOrCreateTelemetryTag(tagFile);
+
+    assertNotNull(tag);
+    assertTrue(Files.exists(tagFile));
+    // Verify it is a valid UUID
+    assertEquals(tag, UUID.fromString(tag).toString());
+  }
+
+  @Test
+  public void testGetOrCreateTelemetryTag_ReadExisting(@TempDir Path tempDir) throws IOException {
+    Path tagFile = tempDir.resolve("telemetry-tag");
+    String existingUuid = UUID.randomUUID().toString();
+    Files.write(tagFile, existingUuid.getBytes(StandardCharsets.UTF_8));
+
+    String tag = DriverEnvironmentBuilder.getOrCreateTelemetryTag(tagFile);
+    assertEquals(existingUuid, tag);
+  }
+
+  @Test
+  public void testGetOrCreateTelemetryTag_RegenerateOnCorruptedFile(@TempDir Path tempDir)
+      throws IOException {
+    Path tagFile = tempDir.resolve("telemetry-tag");
+    String corruptedContent = "not-a-valid-uuid";
+    Files.write(tagFile, corruptedContent.getBytes(StandardCharsets.UTF_8));
+
+    String newTag = DriverEnvironmentBuilder.getOrCreateTelemetryTag(tagFile);
+
+    assertNotNull(newTag);
+    assertNotEquals(corruptedContent, newTag);
+    assertEquals(newTag, UUID.fromString(newTag).toString());
+    // Verify file on disk was overwritten with new valid UUID
+    String fileOnDisk = new String(Files.readAllBytes(tagFile), StandardCharsets.UTF_8).trim();
+    assertEquals(newTag, fileOnDisk);
+  }
+}