diff --git a/.travis.yml b/.travis.yml
index 986d6ba674d..1626d37a706 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -87,6 +87,15 @@ jobs:
         - travis_retry ./scripts/if_changed.sh ./scripts/pod_lib_lint.rb FirebaseDynamicLinks.podspec
         - travis_retry ./scripts/if_changed.sh ./scripts/pod_lib_lint.rb FirebaseDynamicLinks.podspec --use-libraries
         - travis_retry ./scripts/if_changed.sh ./scripts/pod_lib_lint.rb FirebaseDynamicLinks.podspec --use-modular-headers
+ 
+      env:
+        - PROJECT=Segmentation PLATFORM=all METHOD=pod-lib-lint
+      before_install:
+        - ./scripts/if_changed.sh ./scripts/install_prereqs.sh
+      script:
+        - travis_retry ./scripts/if_changed.sh ./scripts/pod_lib_lint.rb FirebaseSegmentation.podspec
+        - travis_retry ./scripts/if_changed.sh ./scripts/pod_lib_lint.rb FirebaseSegmentation.podspec --use-libraries
+        - travis_retry ./scripts/if_changed.sh ./scripts/pod_lib_lint.rb FirebaseSegmentation.podspec --use-modular-headers
 
     - stage: test
       env:
@@ -433,3 +442,4 @@ jobs:
 branches:
   only:
     - master
+    - md-floc-master
diff --git a/FirebaseSegmentation.podspec b/FirebaseSegmentation.podspec
new file mode 100644
index 00000000000..9bbe5c219c3
--- /dev/null
+++ b/FirebaseSegmentation.podspec
@@ -0,0 +1,45 @@
+Pod::Spec.new do |s|
+  s.name             = 'FirebaseSegmentation'
+  s.version          = '0.1.0'
+  s.summary          = 'Firebase Segmentation SDK'
+  s.description      = <<-DESC
+Firebase Segmentation enables you to associate your custom application instance ID with Firebase for user segmentation.
+                       DESC
+
+  s.homepage         = 'https://firebase.google.com'
+  s.license          = { :type => 'Apache', :file => 'LICENSE' }
+  s.authors          = 'Google, Inc.'
+  s.source           = {
+    :git => 'https://github.com/firebase/firebase-ios-sdk.git',
+    :tag => 'Segmentation-' + s.version.to_s
+  }
+
+  s.ios.deployment_target = '8.0'
+  
+  s.cocoapods_version = '>= 1.4.0'
+  s.static_framework = true
+  s.prefix_header_file = false
+
+  s.source_files = 'FirebaseSegmentation/Sources/**/*'
+  s.public_header_files = 'FirebaseSegmentation/Public/*.h'
+
+  s.dependency 'FirebaseCore', '~> 6.0'
+  s.dependency 'FirebaseInstanceID', '~> 4.2'
+
+   header_search_paths = {
+    'HEADER_SEARCH_PATHS' => '"${PODS_TARGET_SRCROOT}"'
+  }
+
+s.user_target_xcconfig = { 'FRAMEWORK_SEARCH_PATHS' => '$(PLATFORM_DIR)/Developer/Library/Frameworks' }
+
+  s.pod_target_xcconfig = {
+    'GCC_C_LANGUAGE_STANDARD' => 'c99',
+    'GCC_PREPROCESSOR_DEFINITIONS' => 'FIRSegmentation_VERSION=' + s.version.to_s
+  }
+
+  s.test_spec 'unit' do |unit_tests|
+    unit_tests.source_files = 'FirebaseSegmentation/Tests/Unit/*.[mh]'
+    unit_tests.dependency 'OCMock'
+  end
+
+end
diff --git a/FirebaseSegmentation/Public/FIRSegmentation.h b/FirebaseSegmentation/Public/FIRSegmentation.h
new file mode 100644
index 00000000000..10c152d594a
--- /dev/null
+++ b/FirebaseSegmentation/Public/FIRSegmentation.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2019 Google
+ *
+ * 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
+ *
+ *      http://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.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class FIRApp;
+/**
+ *  The Firebase Segmentation SDK is used to associate a custom, non-Firebase custom installation
+ * identifier to Firebase. Once this custom installation identifier is set, developers can use the
+ * current app installation for segmentation purposes. If the custom installation identifier is
+ * explicitely set to nil, any existing custom installation identifier data will be removed.
+ */
+NS_SWIFT_NAME(Segmentation)
+@interface FIRSegmentation : NSObject
+
+/**
+ * Singleton instance (scoped to the default FIRApp)
+ * Returns the FIRSegmentation instance for the default Firebase application. Please make sure you
+ * call [FIRApp configure] beforehand for a default Firebase app to already be initialized and
+ * available. This singleton class instance lets you set your own custom identifier to be used for
+ * user segmentation purposes within Firebase.
+ *
+ *  @return A shared instance of FIRSegmentation.
+ */
++ (nonnull FIRSegmentation *)segmentation NS_SWIFT_NAME(segmentation());
+
+/// Singleton instance (scoped to FIRApp)
+/// Returns the FIRSegmentation instance for your Firebase application. This singleton class
+/// instance lets you set your own custom identifier to be used for targeting purposes within
+/// Firebase.
++ (nonnull FIRSegmentation *)segmentationWithApp:(nonnull FIRApp *)app
+    NS_SWIFT_NAME(segmentation(app:));
+
+/**
+ *  Unavailable. Use +segmentation instead.
+ */
+- (instancetype)init __attribute__((unavailable("Use +segmentation instead.")));
+
+/// Set your own custom installation ID to be used for segmentation purposes.
+/// This method needs to be called every time (and immediately) upon any changes to the custom
+/// installation ID.
+/// @param completionHandler Set custom installation ID completion. Returns nil if initialization
+/// succeeded or an NSError object if initialization failed.
+- (void)setCustomInstallationID:(NSString *)customInstallationID
+                     completion:(void (^)(NSError *))completionHandler;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/FirebaseSegmentation/Public/FirebaseSegmentation.h b/FirebaseSegmentation/Public/FirebaseSegmentation.h
new file mode 100644
index 00000000000..31465cbb877
--- /dev/null
+++ b/FirebaseSegmentation/Public/FirebaseSegmentation.h
@@ -0,0 +1,17 @@
+/*
+ * Copyright 2019 Google
+ *
+ * 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
+ *
+ *      http://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.
+ */
+
+#import "FIRSegmentation.h"
diff --git a/FirebaseSegmentation/Sources/CHANGELOG.md b/FirebaseSegmentation/Sources/CHANGELOG.md
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/FirebaseSegmentation/Sources/FIRSegmentation.m b/FirebaseSegmentation/Sources/FIRSegmentation.m
new file mode 100644
index 00000000000..f136a95ccdd
--- /dev/null
+++ b/FirebaseSegmentation/Sources/FIRSegmentation.m
@@ -0,0 +1,15 @@
+// Copyright 2019 Google
+//
+// 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
+//
+//      http://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.
+
+#import "FIRSegmentation.h"
diff --git a/FirebaseSegmentation/Tests/Unit/SEGInitializationTests.m b/FirebaseSegmentation/Tests/Unit/SEGInitializationTests.m
new file mode 100644
index 00000000000..8cc2efd23fe
--- /dev/null
+++ b/FirebaseSegmentation/Tests/Unit/SEGInitializationTests.m
@@ -0,0 +1,46 @@
+// Copyright 2019 Google
+//
+// 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
+//
+//      http://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.
+
+#import <XCTest/XCTest.h>
+
+@interface SEGInitializationTests : XCTestCase
+
+@end
+
+@implementation SEGInitializationTests
+
+- (void)setUp {
+  // Put setup code here. This method is called before the invocation of each test method in the
+  // class.
+}
+
+- (void)tearDown {
+  // Put teardown code here. This method is called after the invocation of each test method in the
+  // class.
+}
+
+- (void)testExample {
+  NSLog(@"this is a test example");
+  // This is an example of a functional test case.
+  // Use XCTAssert and related functions to verify your tests produce the correct results.
+}
+
+- (void)testPerformanceExample {
+  // This is an example of a performance test case.
+  [self measureBlock:^{
+      // Put the code you want to measure the time of here.
+  }];
+}
+
+@end