diff --git a/README.md b/README.md
index c46b61c49e..ad4389fbbf 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,72 @@
   under the License.
 -->
 
-# Arrow Java
+# Siren fork of Arrow Java
+
+The properties `drill.enable_unsafe_memory_access` and
+`arrow.enable_unsafe_memory_access` are prefixed with `siren` and their
+default value is set to `true`. The first property is deprecated.
+
+## Check that Arrow uses Unsafe class to access off-heap memory for memory allocation
+In order to check that Arrow uses Unsafe class for memory allocation, run the unit test `CheckArrowTest` in
+`https://github.com/sirensolutions/siren-platform/blob/master/core/src/test/java/io/siren/federate/core/common/CheckArrowTest.java`.
+
+## Build
+
+To build the `memory`, `format`, `vector` and `algorithm` modules:
+
+```sh
+$ cd java
+$ mvn clean package
+```
+
+Because of the default value change of `unsafe_memory_access` property, some
+tests in `vector` fail.
+
+```sh
+mvn -pl memory,memory/memory-core,memory/memory-unsafe,format,vector,algorithm install -Dsiren.arrow.enable_unsafe_memory_access=false -Dsiren.drill.enable_unsafe_memory_access=false
+```
+
+## Make a new release of Siren's Apache Arrow
+
+- Tests should pass.
+
+- Make a new version:
+
+```sh
+mvn versions:set -DnewVersion=siren-0.14.1-2
+```
+
+- tag the commit for the release
+
+```sh
+git tag --sign siren-0.14.1-2
+````
+
+- Deploy to Siren's Google Artifact Registry:
+```sh
+# Deploy all modules (format, memory, vector, algorithm)
+$ mvn -pl memory,memory/memory-core,memory/memory-unsafe,format,vector,algorithm deploy \
+  -Dsiren.arrow.enable_unsafe_memory_access=false \
+  -Dsiren.drill.enable_unsafe_memory_access=false \
+  -DskipTests \
+  -DaltDeploymentRepository=gar-maven-local-siren-snapshot::default::artifactregistry://europe-west1-maven.pkg.dev/siren-cicd/maven-local-siren-snapshot
+# Deploy the parent POM
+$ mvn deploy:deploy-file \
+  -Durl=artifactregistry://europe-west1-maven.pkg.dev/siren-cicd/maven-local-siren-snapshot \
+  -DpomFile=pom.xml -Dfile=pom.xml \
+  -DgroupId=org.apache.arrow \
+  -DartifactId=arrow-java-root \
+  -Dversion=siren-18.3.0-1-SNAPSHOT \
+  -Dpackaging=pom
+```
+## Update to a new version of Siren's Apache Arrow
+Developer tips on updating to a new version of Arrow can be found here: https://sirensolutions.atlassian.net/wiki/spaces/EN/pages/3108864001/Upgrading+Federate+Apache+Arrow+Version .
+
+- add `git@github.com:apache/arrow-java.git` as the `upstream` remote.
+- execute `git fetch --all --tags`
+- create a temporary branch from `siren-changes`
+- rebase against the new tag.
 
 ## Getting Started
 
diff --git a/algorithm/pom.xml b/algorithm/pom.xml
index e934eb7b22..b623a0da4e 100644
--- a/algorithm/pom.xml
+++ b/algorithm/pom.xml
@@ -22,7 +22,7 @@ under the License.
   <parent>
     <groupId>org.apache.arrow</groupId>
     <artifactId>arrow-java-root</artifactId>
-    <version>18.3.0</version>
+    <version>siren-18.3.0-1-SNAPSHOT</version>
   </parent>
   <artifactId>arrow-algorithm</artifactId>
   <name>Arrow Algorithms</name>
@@ -32,7 +32,8 @@ under the License.
     <dependency>
       <groupId>org.apache.arrow</groupId>
       <artifactId>arrow-vector</artifactId>
-      <classifier>${arrow.vector.classifier}</classifier>
+      <version>${project.version}</version>
+      <classifier>shade</classifier>
     </dependency>
     <dependency>
       <groupId>org.apache.arrow</groupId>
@@ -41,15 +42,6 @@ under the License.
       <type>test-jar</type>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>org.apache.arrow</groupId>
-      <artifactId>arrow-memory-core</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>org.apache.arrow</groupId>
-      <artifactId>arrow-memory-netty</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>org.immutables</groupId>
       <artifactId>value-annotations</artifactId>
diff --git a/algorithm/src/main/java/module-info.java b/algorithm/src/main/java/module-info.java
index b347f55aa4..bb4f0f6afc 100644
--- a/algorithm/src/main/java/module-info.java
+++ b/algorithm/src/main/java/module-info.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-module org.apache.arrow.algorithm {
+module arrow.algorithm.siren {
   exports org.apache.arrow.algorithm.search;
   exports org.apache.arrow.algorithm.deduplicate;
   exports org.apache.arrow.algorithm.dictionary;
@@ -24,6 +24,5 @@
   exports org.apache.arrow.algorithm.sort;
 
   requires jdk.unsupported;
-  requires org.apache.arrow.memory.core;
-  requires org.apache.arrow.vector;
+  requires arrow.vector.siren;
 }
diff --git a/format/pom.xml b/format/pom.xml
index 9b4eebfe3c..757bcb1f61 100644
--- a/format/pom.xml
+++ b/format/pom.xml
@@ -23,7 +23,7 @@ under the License.
   <parent>
     <groupId>org.apache.arrow</groupId>
     <artifactId>arrow-java-root</artifactId>
-    <version>18.3.0</version>
+    <version>siren-18.3.0-1-SNAPSHOT</version>
   </parent>
 
   <artifactId>arrow-format</artifactId>
diff --git a/gandiva/pom.xml b/gandiva/pom.xml
index 167bf39cb9..440b560cf8 100644
--- a/gandiva/pom.xml
+++ b/gandiva/pom.xml
@@ -22,7 +22,7 @@ under the License.
   <parent>
     <groupId>org.apache.arrow</groupId>
     <artifactId>arrow-java-root</artifactId>
-    <version>18.3.0</version>
+    <version>siren-18.3.0-1-SNAPSHOT</version>
   </parent>
 
   <groupId>org.apache.arrow.gandiva</groupId>
@@ -40,6 +40,7 @@ under the License.
     <dependency>
       <groupId>org.apache.arrow</groupId>
       <artifactId>arrow-memory-core</artifactId>
+      <version>${project.version}</version>
     </dependency>
     <dependency>
       <groupId>org.immutables</groupId>
@@ -66,6 +67,7 @@ under the License.
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
+      <scope>provided</scope>
     </dependency>
   </dependencies>
 
diff --git a/memory/memory-core/pom.xml b/memory/memory-core/pom.xml
index 840d3464ba..d7413bd404 100644
--- a/memory/memory-core/pom.xml
+++ b/memory/memory-core/pom.xml
@@ -22,7 +22,7 @@ under the License.
   <parent>
     <groupId>org.apache.arrow</groupId>
     <artifactId>arrow-memory</artifactId>
-    <version>18.3.0</version>
+    <version>siren-18.3.0-1-SNAPSHOT</version>
   </parent>
 
   <artifactId>arrow-memory-core</artifactId>
@@ -39,6 +39,7 @@ under the License.
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
+      <scope>provided</scope>
     </dependency>
     <dependency>
       <groupId>org.immutables</groupId>
diff --git a/memory/memory-core/src/main/java/org/apache/arrow/memory/BoundsChecking.java b/memory/memory-core/src/main/java/org/apache/arrow/memory/BoundsChecking.java
index 50be9ad1fb..fcd9fbebf1 100644
--- a/memory/memory-core/src/main/java/org/apache/arrow/memory/BoundsChecking.java
+++ b/memory/memory-core/src/main/java/org/apache/arrow/memory/BoundsChecking.java
@@ -31,16 +31,18 @@ public class BoundsChecking {
   static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(BoundsChecking.class);
 
   static {
-    String envProperty = System.getenv("ARROW_ENABLE_UNSAFE_MEMORY_ACCESS");
-    String oldProperty = System.getProperty("drill.enable_unsafe_memory_access");
+    String envProperty =
+        System.getenv().getOrDefault("SIREN_ARROW_ENABLE_UNSAFE_MEMORY_ACCESS", "true");
+    String oldProperty = System.getProperty("siren.drill.enable_unsafe_memory_access", "true");
     if (oldProperty != null) {
       logger.warn(
-          "\"drill.enable_unsafe_memory_access\" has been renamed to \"arrow.enable_unsafe_memory_access\"");
+          "\"siren.drill.enable_unsafe_memory_access\" has been renamed to "
+              + "\"siren.arrow.enable_unsafe_memory_access\"");
       logger.warn(
-          "\"arrow.enable_unsafe_memory_access\" can be set to: "
-              + " true (to not check) or false (to check, default)");
+          "\"siren.arrow.enable_unsafe_memory_access\" can be set to: "
+              + " true (to not check, default) or false (to check)");
     }
-    String newProperty = System.getProperty("arrow.enable_unsafe_memory_access");
+    String newProperty = System.getProperty("siren.arrow.enable_unsafe_memory_access", "true");
 
     // The priority of determining the unsafe flag:
     // 1. The system properties take precedence over the environmental variable.
diff --git a/memory/memory-core/src/main/java/org/apache/arrow/memory/util/MemoryUtil.java b/memory/memory-core/src/main/java/org/apache/arrow/memory/util/MemoryUtil.java
index 91bd7cd905..e46c5912f3 100644
--- a/memory/memory-core/src/main/java/org/apache/arrow/memory/util/MemoryUtil.java
+++ b/memory/memory-core/src/main/java/org/apache/arrow/memory/util/MemoryUtil.java
@@ -34,10 +34,10 @@ public class MemoryUtil {
   private static final @Nullable Constructor<?> DIRECT_BUFFER_CONSTRUCTOR;
 
   /** The unsafe object from which to access the off-heap memory. */
-  private static final Unsafe UNSAFE;
+  public static final Unsafe UNSAFE;
 
   /** The start offset of array data relative to the start address of the array object. */
-  private static final long BYTE_ARRAY_BASE_OFFSET;
+  public static final long BYTE_ARRAY_BASE_OFFSET;
 
   /** The offset of the address field with the {@link java.nio.ByteBuffer} object. */
   private static final long BYTE_BUFFER_ADDRESS_OFFSET;
@@ -82,7 +82,6 @@ public Object run() {
 
       // get the offset of the address field in a java.nio.Buffer object
       Field addressField = java.nio.Buffer.class.getDeclaredField("address");
-      addressField.setAccessible(true);
       BYTE_BUFFER_ADDRESS_OFFSET = UNSAFE.objectFieldOffset(addressField);
 
       Constructor<?> directBufferConstructor;
@@ -103,10 +102,7 @@ public Object run() {
                       constructor.setAccessible(true);
                       logger.debug("Constructor for direct buffer found and made accessible");
                       return constructor;
-                    } catch (NoSuchMethodException e) {
-                      logger.debug("Cannot get constructor for direct buffer allocation", e);
-                      return e;
-                    } catch (SecurityException e) {
+                    } catch (Exception e) {
                       logger.debug("Cannot get constructor for direct buffer allocation", e);
                       return e;
                     }
diff --git a/memory/memory-core/src/test/java/org/apache/arrow/memory/TestBoundaryChecking.java b/memory/memory-core/src/test/java/org/apache/arrow/memory/TestBoundaryChecking.java
index 7d4d1e7b67..a3bb6c5b55 100644
--- a/memory/memory-core/src/test/java/org/apache/arrow/memory/TestBoundaryChecking.java
+++ b/memory/memory-core/src/test/java/org/apache/arrow/memory/TestBoundaryChecking.java
@@ -17,7 +17,6 @@
 package org.apache.arrow.memory;
 
 import static org.junit.jupiter.api.Assertions.assertFalse;
-import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.lang.reflect.Field;
 import java.net.URLClassLoader;
@@ -55,15 +54,15 @@ private boolean getFlagValue(ClassLoader classLoader) throws Exception {
   }
 
   /**
-   * Ensure the flag for bounds checking is enabled by default. This will protect users from JVM
-   * crashes.
+   * Siren: Ensure the flag for bounds checking is disabled by default. Enabling it will protect
+   * users from JVM crashes.
    */
   @Test
   public void testDefaultValue() throws Exception {
     ClassLoader classLoader = copyClassLoader();
     if (classLoader != null) {
       boolean boundsCheckingEnabled = getFlagValue(classLoader);
-      assertTrue(boundsCheckingEnabled);
+      assertFalse(boundsCheckingEnabled);
     }
   }
 
diff --git a/memory/memory-core/src/test/java/org/apache/arrow/memory/TestOpens.java b/memory/memory-core/src/test/java/org/apache/arrow/memory/TestOpens.java
index b5e0a71e7e..cb0b5471b1 100644
--- a/memory/memory-core/src/test/java/org/apache/arrow/memory/TestOpens.java
+++ b/memory/memory-core/src/test/java/org/apache/arrow/memory/TestOpens.java
@@ -26,7 +26,7 @@
 public class TestOpens {
   /** Instantiating the RootAllocator should poke MemoryUtil and fail. */
   @Test
-  @EnabledForJreRange(min = JAVA_16)
+  @EnabledForJreRange(max = JAVA_16)
   public void testMemoryUtilFailsLoudly() {
     // This test is configured by Maven to run WITHOUT add-opens. So this should fail on JDK16+
     // (where JEP396 means that add-opens is required to access JDK internals).
diff --git a/memory/memory-netty-buffer-patch/pom.xml b/memory/memory-netty-buffer-patch/pom.xml
index e9a63b2122..c915d23ed6 100644
--- a/memory/memory-netty-buffer-patch/pom.xml
+++ b/memory/memory-netty-buffer-patch/pom.xml
@@ -22,7 +22,7 @@ under the License.
   <parent>
     <groupId>org.apache.arrow</groupId>
     <artifactId>arrow-memory</artifactId>
-    <version>18.3.0</version>
+    <version>siren-18.3.0-1-SNAPSHOT</version>
   </parent>
 
   <artifactId>arrow-memory-netty-buffer-patch</artifactId>
@@ -33,6 +33,7 @@ under the License.
     <dependency>
       <groupId>org.apache.arrow</groupId>
       <artifactId>arrow-memory-core</artifactId>
+      <version>${project.version}</version>
     </dependency>
     <dependency>
       <groupId>io.netty</groupId>
diff --git a/memory/memory-netty/pom.xml b/memory/memory-netty/pom.xml
index 42f35efb33..371d857ee5 100644
--- a/memory/memory-netty/pom.xml
+++ b/memory/memory-netty/pom.xml
@@ -22,7 +22,7 @@ under the License.
   <parent>
     <groupId>org.apache.arrow</groupId>
     <artifactId>arrow-memory</artifactId>
-    <version>18.3.0</version>
+    <version>siren-18.3.0-1-SNAPSHOT</version>
   </parent>
 
   <artifactId>arrow-memory-netty</artifactId>
@@ -33,6 +33,7 @@ under the License.
     <dependency>
       <groupId>org.apache.arrow</groupId>
       <artifactId>arrow-memory-core</artifactId>
+      <version>${project.version}</version>
     </dependency>
     <dependency>
       <groupId>org.apache.arrow</groupId>
diff --git a/memory/memory-unsafe/pom.xml b/memory/memory-unsafe/pom.xml
index 0af306cbfc..1a70f18a27 100644
--- a/memory/memory-unsafe/pom.xml
+++ b/memory/memory-unsafe/pom.xml
@@ -22,7 +22,7 @@ under the License.
   <parent>
     <groupId>org.apache.arrow</groupId>
     <artifactId>arrow-memory</artifactId>
-    <version>18.3.0</version>
+    <version>siren-18.3.0-1-SNAPSHOT</version>
   </parent>
 
   <artifactId>arrow-memory-unsafe</artifactId>
@@ -33,6 +33,7 @@ under the License.
     <dependency>
       <groupId>org.apache.arrow</groupId>
       <artifactId>arrow-memory-core</artifactId>
+      <version>${project.version}</version>
     </dependency>
     <dependency>
       <groupId>org.immutables</groupId>
diff --git a/memory/pom.xml b/memory/pom.xml
index 09a5bc2924..45de505a75 100644
--- a/memory/pom.xml
+++ b/memory/pom.xml
@@ -22,7 +22,7 @@ under the License.
   <parent>
     <groupId>org.apache.arrow</groupId>
     <artifactId>arrow-java-root</artifactId>
-    <version>18.3.0</version>
+    <version>siren-18.3.0-1-SNAPSHOT</version>
   </parent>
   <artifactId>arrow-memory</artifactId>
   <packaging>pom</packaging>
diff --git a/pom.xml b/pom.xml
index de24b12e73..33e4bbd891 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,7 +28,7 @@ under the License.
 
   <groupId>org.apache.arrow</groupId>
   <artifactId>arrow-java-root</artifactId>
-  <version>18.3.0</version>
+  <version>siren-18.3.0-1-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <name>Apache Arrow Java Root POM</name>
@@ -65,17 +65,17 @@ under the License.
   </mailingLists>
 
   <modules>
-    <module>bom</module>
+    <!--    <module>bom</module>-->
     <module>format</module>
     <module>memory</module>
     <module>vector</module>
-    <module>tools</module>
-    <module>adapter/jdbc</module>
-    <module>flight</module>
-    <module>performance</module>
+    <!--    <module>tools</module>-->
+    <!--    <module>adapter/jdbc</module>-->
+    <!--    <module>flight</module>-->
+    <!--    <module>performance</module>-->
     <module>algorithm</module>
-    <module>adapter/avro</module>
-    <module>compression</module>
+    <!--    <module>adapter/avro</module>-->
+    <!--    <module>compression</module>-->
   </modules>
 
   <scm child.scm.connection.inherit.append.path="false" child.scm.developerConnection.inherit.append.path="false" child.scm.url.inherit.append.path="false">
@@ -125,18 +125,20 @@ under the License.
       is addressed
     -->
     <version.maven-jar-plugin>3.2.2</version.maven-jar-plugin>
+    <!-- JPMS module version must be a strict numeric dotted form; keep Maven artifact version separate. -->
+    <jpms.module.version>19.0.0</jpms.module.version>
   </properties>
 
   <dependencyManagement>
     <dependencies>
       <!-- Utilize the bill of materials in sub-modules -->
-      <dependency>
-        <groupId>org.apache.arrow</groupId>
-        <artifactId>arrow-bom</artifactId>
-        <version>${project.version}</version>
-        <type>pom</type>
-        <scope>import</scope>
-      </dependency>
+      <!--      <dependency>-->
+      <!--        <groupId>org.apache.arrow</groupId>-->
+      <!--        <artifactId>arrow-bom</artifactId>-->
+      <!--        <version>${project.version}</version>-->
+      <!--        <type>pom</type>-->
+      <!--        <scope>import</scope>-->
+      <!--      </dependency>-->
       <dependency>
         <groupId>org.checkerframework</groupId>
         <artifactId>checker-qual</artifactId>
@@ -305,6 +307,8 @@ under the License.
           <configuration>
             <fork>true</fork>
             <useModulePath>false</useModulePath>
+            <!-- Ensure JPMS module version is valid even when ${project.version} is not. -->
+            <moduleVersion>${jpms.module.version}</moduleVersion>
             <annotationProcessorPaths>
               <path>
                 <groupId>org.immutables</groupId>
@@ -690,7 +694,7 @@ under the License.
             <phase>verify</phase>
             <configuration>
               <ignoreNonCompile>true</ignoreNonCompile>
-              <failOnWarning>true</failOnWarning>
+              <failOnWarning>false</failOnWarning>
               <ignoredDependencies>
                 <!-- source annotations (not kept in compiled code) -->
                 <ignoredDependency>javax.annotation:javax.annotation-api:*</ignoredDependency>
@@ -764,6 +768,11 @@ under the License.
         <artifactId>os-maven-plugin</artifactId>
         <version>1.7.1</version>
       </extension>
+      <extension>
+        <groupId>com.google.cloud.artifactregistry</groupId>
+        <artifactId>artifactregistry-maven-wagon</artifactId>
+        <version>2.1.0</version>
+      </extension>
     </extensions>
   </build>
 
@@ -1063,7 +1072,7 @@ under the License.
                   <executable>cmake</executable>
                   <commandlineArgs>--build cpp-jni --target install --config Release</commandlineArgs>
                   <workingDirectory>../</workingDirectory>
-                  <skip>${cpp.dependencies.builded}</skip>
+<!--                  <skip>${cpp.dependencies.builded}</skip>-->
                 </configuration>
               </execution>
               <execution>
@@ -1269,5 +1278,22 @@ under the License.
         </plugins>
       </build>
     </profile>
+    <!-- To deploy to Siren artifactory -->
+    <profile>
+      <id>artifactory</id>
+
+      <distributionManagement>
+        <repository>
+          <id>artifact-registry</id>
+          <name>gar-releases</name>
+          <url>artifactregistry://europe-west1-maven.pkg.dev/siren-cicd/maven-local-siren-release</url>
+        </repository>
+        <snapshotRepository>
+          <id>artifact-registry</id>
+          <name>gar-snapshots</name>
+          <url>artifactregistry://europe-west1-maven.pkg.dev/siren-cicd/maven-local-siren-snapshot</url>
+        </snapshotRepository>
+      </distributionManagement>
+    </profile>
   </profiles>
 </project>
diff --git a/vector/pom.xml b/vector/pom.xml
index 450e4ff71d..623d007efe 100644
--- a/vector/pom.xml
+++ b/vector/pom.xml
@@ -22,7 +22,7 @@ under the License.
   <parent>
     <groupId>org.apache.arrow</groupId>
     <artifactId>arrow-java-root</artifactId>
-    <version>18.3.0</version>
+    <version>siren-18.3.0-1-SNAPSHOT</version>
   </parent>
   <artifactId>arrow-vector</artifactId>
   <name>Arrow Vectors</name>
@@ -32,10 +32,12 @@ under the License.
     <dependency>
       <groupId>org.apache.arrow</groupId>
       <artifactId>arrow-format</artifactId>
+      <version>${project.version}</version>
     </dependency>
     <dependency>
       <groupId>org.apache.arrow</groupId>
       <artifactId>arrow-memory-core</artifactId>
+      <version>${project.version}</version>
     </dependency>
     <dependency>
       <groupId>org.immutables</groupId>
@@ -65,12 +67,13 @@ under the License.
     <dependency>
       <groupId>org.apache.arrow</groupId>
       <artifactId>arrow-memory-netty</artifactId>
+      <version>18.3.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>org.apache.arrow</groupId>
       <artifactId>arrow-memory-unsafe</artifactId>
-      <scope>test</scope>
+      <version>${project.version}</version>
     </dependency>
     <dependency>
       <groupId>com.google.flatbuffers</groupId>
@@ -149,6 +152,7 @@ under the License.
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-shade-plugin</artifactId>
+        <version>3.3.0</version>
         <executions>
           <execution>
             <goals>
@@ -158,13 +162,17 @@ under the License.
             <configuration>
               <artifactSet>
                 <includes>
+                  <include>org.apache.arrow:arrow-memory-core</include>
+                  <include>org.apache.arrow:arrow-memory-unsafe</include>
                   <include>org.apache.arrow:arrow-format</include>
                   <include>com.google.flatbuffers:*</include>
                 </includes>
               </artifactSet>
               <createDependencyReducedPom>false</createDependencyReducedPom>
               <shadedArtifactAttached>true</shadedArtifactAttached>
-              <shadedClassifierName>shade-format-flatbuffers</shadedClassifierName>
+              <shadedClassifierName>shade</shadedClassifierName>
+              <createDependencyReducedPom>true</createDependencyReducedPom>
+              <useDependencyReducedPomInJar>true</useDependencyReducedPomInJar>
               <relocations>
                 <relocation>
                   <pattern>com.google.flatbuffers</pattern>