diff --git a/src/main/java/org/gitlab4j/api/GroupApi.java b/src/main/java/org/gitlab4j/api/GroupApi.java
index ce5f7e15d1950168c2f0f0f64bcef7109d6a4f26..4ad864610ee19e2082f58e5bed61732808f597a9 100644
--- a/src/main/java/org/gitlab4j/api/GroupApi.java
+++ b/src/main/java/org/gitlab4j/api/GroupApi.java
@@ -21,6 +21,8 @@ import org.gitlab4j.api.models.Visibility;
 
 /**
  * This class implements the client side API for the GitLab groups calls.
+ * @see <a href="https://docs.gitlab.com/ce/api/groups.html">Groups API at GitLab</a>
+ * @see <a href="https://docs.gitlab.com/ee/api/members.html">Group and project members API at GitLab</a>
  */
 public class GroupApi extends AbstractApi {
 
@@ -729,7 +731,8 @@ public class GroupApi extends AbstractApi {
      * @throws GitLabApiException if any exception occurs
      */
     public Member getMember(Object groupIdOrPath, int userId) throws GitLabApiException {
-        Response response = get(Response.Status.OK, getDefaultPerPageParam(), "groups", getGroupIdOrPath(groupIdOrPath), "members", userId);
+        Response response = get(Response.Status.OK, getDefaultPerPageParam(),
+                "groups", getGroupIdOrPath(groupIdOrPath), "members", userId);
         return (response.readEntity(new GenericType<Member>() {}));
     }
 
@@ -750,6 +753,75 @@ public class GroupApi extends AbstractApi {
         }
     }
 
+    /**
+     * Gets a list of group members viewable by the authenticated user, including inherited members
+     * through ancestor groups. Returns multiple times the same user (with different member attributes)
+     * when the user is a member of the group and of one or more ancestor group.
+     *
+     * <pre><code>GitLab Endpoint: GET /groups/:id/members/all</code></pre>
+     *
+     * @param groupIdOrPath the group ID, path of the group, or a Group instance holding the group ID or path
+     * @return a list of group members viewable by the authenticated user, including inherited members
+     * through ancestor groups
+     * @throws GitLabApiException if any exception occurs
+     */
+    public List<Member> getAllMembers(Object groupIdOrPath) throws GitLabApiException {
+        return (getAllMembers(groupIdOrPath, getDefaultPerPage()).all());
+    }
+
+    /**
+     * Gets a list of group members viewable by the authenticated user, including inherited members
+     * through ancestor groups. Returns multiple times the same user (with different member attributes)
+     * when the user is a member of the group and of one or more ancestor group.
+     *
+     * <pre><code>GitLab Endpoint: GET /groups/:id/members/all</code></pre>
+     *
+     * @param groupIdOrPath the group ID, path of the group, or a Group instance holding the group ID or path
+     * @param page the page to get
+     * @param perPage the number of Member instances per page
+     * @return a list of group members viewable by the authenticated user, including inherited members
+     * through ancestor groups in the specified page range
+     * @throws GitLabApiException if any exception occurs
+     */
+    public List<Member> getAllMembers(Object groupIdOrPath, int page, int perPage) throws GitLabApiException {
+        Response response = get(Response.Status.OK, getPageQueryParams(page, perPage),
+                "groups", getGroupIdOrPath(groupIdOrPath), "members", "all");
+        return (response.readEntity(new GenericType<List<Member>>() {}));
+    }
+
+    /**
+     * Gets a Pager of group members viewable by the authenticated user, including inherited members
+     * through ancestor groups. Returns multiple times the same user (with different member attributes)
+     * when the user is a member of the group and of one or more ancestor group.
+     *
+     * <pre><code>GitLab Endpoint: GET /groups/:id/members/all</code></pre>
+     *
+     * @param groupIdOrPath the group ID, path of the group, or a Group instance holding the group ID or path
+     * @param itemsPerPage the number of Member instances that will be fetched per page
+     * @return a Pager of group members viewable by the authenticated user, including inherited members
+     * through ancestor groups
+     * @throws GitLabApiException if any exception occurs
+     */
+    public Pager<Member> getAllMembers(Object groupIdOrPath, int itemsPerPage) throws GitLabApiException {
+        return (new Pager<Member>(this, Member.class, itemsPerPage, null, "groups", getGroupIdOrPath(groupIdOrPath), "members", "all"));
+    }
+
+    /**
+     * Gets a Stream of group members viewable by the authenticated user, including inherited members
+     * through ancestor groups. Returns multiple times the same user (with different member attributes)
+     * when the user is a member of the group and of one or more ancestor group.
+     *
+     * <pre><code>GitLab Endpoint: GET /groups/:id/members/all</code></pre>
+     *
+     * @param groupIdOrPath the group ID, path of the group, or a Group instance holding the group ID or path
+     * @return a Stream of group members viewable by the authenticated user, including inherited members
+     * through ancestor groups
+     * @throws GitLabApiException if any exception occurs
+     */
+    public Stream<Member> getAllMembersStream(Object groupIdOrPath) throws GitLabApiException {
+        return (getAllMembers(groupIdOrPath, getDefaultPerPage()).stream());
+    }
+
     /**
      * Adds a user to the list of group members.
      *
diff --git a/src/main/java/org/gitlab4j/api/ProjectApi.java b/src/main/java/org/gitlab4j/api/ProjectApi.java
index 474dda256a5bb26f4dd8eb2332d1e60783ab5ec0..10e7c6202e2fdc87ece32bffe84b758e24351bae 100644
--- a/src/main/java/org/gitlab4j/api/ProjectApi.java
+++ b/src/main/java/org/gitlab4j/api/ProjectApi.java
@@ -54,6 +54,8 @@ import org.gitlab4j.api.models.Visibility;
 
 /**
  * This class provides an entry point to all the GitLab API project calls.
+ * @see <a href="https://docs.gitlab.com/ce/api/projects.html">Projects API at GitLab</a>
+ * @see <a href="https://docs.gitlab.com/ee/api/members.html">Group and project members API at GitLab</a>
  */
 public class ProjectApi extends AbstractApi implements Constants {
 
@@ -1213,6 +1215,78 @@ public class ProjectApi extends AbstractApi implements Constants {
         return (getMembers(projectIdOrPath, getDefaultPerPage()).stream());
     }
 
+    /**
+     * Gets a list of project members viewable by the authenticated user,
+     * including inherited members through ancestor groups. Returns multiple
+     * times the same user (with different member attributes) when the user is
+     * a member of the project/group and of one or more ancestor group.
+     *
+     * <pre><code>GET /projects/:id/members/all</code></pre>
+     *
+     * @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance
+     * @return the project members viewable by the authenticated user, including inherited members through ancestor groups
+     * @throws GitLabApiException if any exception occurs
+     */
+    public List<Member> getAllMembers(Object projectIdOrPath) throws GitLabApiException {
+        return (getAllMembers(projectIdOrPath, getDefaultPerPage()).all());
+    }
+
+    /**
+     * Gets a list of project members viewable by the authenticated user,
+     * including inherited members through ancestor groups. Returns multiple
+     * times the same user (with different member attributes) when the user is
+     * a member of the project/group and of one or more ancestor group.
+     *
+     * <pre><code>GET /projects/:id/members</code></pre>
+     *
+     * @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance
+     * @param page the page to get
+     * @param perPage the number of Member instances per page
+     * @return the project members viewable by the authenticated user, including inherited members through ancestor groups
+     * @throws GitLabApiException if any exception occurs
+     */
+    public List<Member> getAllMembers(Object projectIdOrPath, int page, int perPage) throws GitLabApiException {
+        Response response = get(Response.Status.OK, getPageQueryParams(page, perPage),
+                "projects", getProjectIdOrPath(projectIdOrPath), "members", "all");
+        return (response.readEntity(new GenericType<List<Member>>() {}));
+    }
+
+    /**
+     * Gets a Pager of project members viewable by the authenticated user,
+     * including inherited members through ancestor groups. Returns multiple
+     * times the same user (with different member attributes) when the user is
+     * a member of the project/group and of one or more ancestor group.
+     *
+     * <pre><code>GET /projects/:id/members/all</code></pre>
+     *
+     * @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance
+     * @param itemsPerPage the number of Project instances that will be fetched per page
+     * @return a Pager of the project members viewable by the authenticated user,
+     * including inherited members through ancestor groups
+     * @throws GitLabApiException if any exception occurs
+     */
+    public Pager<Member> getAllMembers(Object projectIdOrPath, int itemsPerPage) throws GitLabApiException {
+        return (new Pager<Member>(this, Member.class, itemsPerPage, null,
+                "projects", getProjectIdOrPath(projectIdOrPath), "members", "all"));
+    }
+
+    /**
+     * Gets a Stream of project members viewable by the authenticated user,
+     * including inherited members through ancestor groups. Returns multiple
+     * times the same user (with different member attributes) when the user is
+     * a member of the project/group and of one or more ancestor group.
+     *
+     * <pre><code>GET /projects/:id/members/all</code></pre>
+     *
+     * @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance
+     * @return a Stream of the project members viewable by the authenticated user,
+     * including inherited members through ancestor groups
+     * @throws GitLabApiException if any exception occurs
+     */
+    public Stream<Member> getAllMembersStream(Object projectIdOrPath) throws GitLabApiException {
+        return (getAllMembers(projectIdOrPath, getDefaultPerPage()).stream());
+    }
+
     /**
      * Gets a project team member.
      *
diff --git a/src/test/java/org/gitlab4j/api/TestGroupApi.java b/src/test/java/org/gitlab4j/api/TestGroupApi.java
index 186235eded082740ab04c1cad235ace39bfe53ba..92b10c017debd1c1f542bf516472d6463b00c2c9 100644
--- a/src/test/java/org/gitlab4j/api/TestGroupApi.java
+++ b/src/test/java/org/gitlab4j/api/TestGroupApi.java
@@ -112,11 +112,57 @@ public class TestGroupApi extends AbstractIntegrationTest {
     @Test
     public void testMemberOperations() throws GitLabApiException {
 
+        // Arrange and Act
         Member member = gitLabApi.getGroupApi().addMember(testGroup.getId(), testUser.getId(), AccessLevel.DEVELOPER);
+
+        // Assert
+        assertNotNull(member);
+        assertEquals(testUser.getId(), member.getId());
+        assertEquals(AccessLevel.DEVELOPER, member.getAccessLevel());
+
+        // Act
+        Optional<Member> optionalMember = gitLabApi.getGroupApi().getOptionalMember(testGroup, testUser.getId());
+
+        // Assert
+        assertTrue(optionalMember.isPresent());
+
+        // Act
+        List<Member> members = gitLabApi.getGroupApi().getMembers(testGroup);
+
+        // Assert
+        assertNotNull(members);
+        Boolean found = (members.stream().filter(m -> m.getId().equals(member.getId())).findAny().orElse(null) != null);
+        assertTrue(found);
+
+        // Act
+        gitLabApi.getGroupApi().removeMember(testGroup.getId(), testUser.getId());
+
+        // Act
+        optionalMember = gitLabApi.getGroupApi().getOptionalMember(testGroup, testUser.getId());
+
+        // Assert
+        assertFalse(optionalMember.isPresent());
+    }
+
+    @Test
+    public void testAllMemberOperations() throws GitLabApiException {
+
+        // Arrange and Act
+        Member member = gitLabApi.getGroupApi().addMember(testGroup.getId(), testUser.getId(), AccessLevel.DEVELOPER);
+
+        // Assert
         assertNotNull(member);
         assertEquals(testUser.getId(), member.getId());
         assertEquals(AccessLevel.DEVELOPER, member.getAccessLevel());
 
+        // Act
+        List<Member> members = gitLabApi.getGroupApi().getAllMembers(testGroup);
+
+        // Assert
+        assertNotNull(members);
+        Boolean found = (members.stream().filter(m -> m.getId().equals(member.getId())).findAny().orElse(null) != null);
+        assertTrue(found);
+
         gitLabApi.getGroupApi().removeMember(testGroup.getId(), testUser.getId());
     }
 
diff --git a/src/test/java/org/gitlab4j/api/TestProjectApi.java b/src/test/java/org/gitlab4j/api/TestProjectApi.java
index 4a6b9f21bfd5bff1292cfe28c7b70d5e79dad3f0..9ce546221cd27e06e5eb5b85b62e30c79ecbcccc 100644
--- a/src/test/java/org/gitlab4j/api/TestProjectApi.java
+++ b/src/test/java/org/gitlab4j/api/TestProjectApi.java
@@ -41,6 +41,7 @@ import javax.ws.rs.core.Response;
 
 import org.gitlab4j.api.models.AccessLevel;
 import org.gitlab4j.api.models.Group;
+import org.gitlab4j.api.models.Member;
 import org.gitlab4j.api.models.Project;
 import org.gitlab4j.api.models.Variable;
 import org.gitlab4j.api.models.Visibility;
@@ -79,7 +80,9 @@ public class TestProjectApi extends AbstractIntegrationTest {
     private static final String TEST_PROJECT_NAME_UPDATE = "test-gitlab4j-create-project-update";
     private static final String TEST_XFER_PROJECT_NAME = "test-gitlab4j-xfer-project";
     private static final String TEST_VARIABLE_KEY_PREFIX = "TEST_VARIABLE_KEY_";
+
     private static GitLabApi gitLabApi;
+    private static Project testProject;
 
     public TestProjectApi() {
         super();
@@ -90,6 +93,7 @@ public class TestProjectApi extends AbstractIntegrationTest {
 
         // Must setup the connection to the GitLab test server
         gitLabApi = baseTestSetup();
+        testProject = getTestProject();
 
         deleteAllTestProjects();
     }
@@ -126,16 +130,15 @@ public class TestProjectApi extends AbstractIntegrationTest {
 
         if (TEST_GROUP != null && TEST_PROJECT_NAME != null) {
             try {
-                Project project = gitLabApi.getProjectApi().getProject(TEST_NAMESPACE, TEST_PROJECT_NAME);
                 List<Group> groups = gitLabApi.getGroupApi().getGroups(TEST_GROUP);
-                gitLabApi.getProjectApi().unshareProject(project.getId(), groups.get(0).getId());
+                gitLabApi.getProjectApi().unshareProject(testProject, groups.get(0).getId());
 
-                List<Variable> variables = gitLabApi.getProjectApi().getVariables(project);
+                List<Variable> variables = gitLabApi.getProjectApi().getVariables(testProject);
                 if (variables != null) {
 
                     for (Variable variable : variables) {
                         if (variable.getKey().startsWith(TEST_VARIABLE_KEY_PREFIX)) {
-                            gitLabApi.getProjectApi().deleteVariable(project, variable.getKey());
+                            gitLabApi.getProjectApi().deleteVariable(testProject, variable.getKey());
                         }
                     }
                 }
@@ -353,18 +356,17 @@ public class TestProjectApi extends AbstractIntegrationTest {
     @Test
     public void testListStarredProjects() throws GitLabApiException {
 
-        Project project = gitLabApi.getProjectApi().getProject(TEST_NAMESPACE, TEST_PROJECT_NAME);
-        assertNotNull(project);
+        assumeNotNull(testProject);
 
         try {
-            gitLabApi.getProjectApi().starProject(project);
+            gitLabApi.getProjectApi().starProject(testProject);
         } catch (Exception ignore) {
         }
 
         List<Project> projects = gitLabApi.getProjectApi().getStarredProjects();
 
         try {
-            gitLabApi.getProjectApi().unstarProject(project);
+            gitLabApi.getProjectApi().unstarProject(testProject);
         } catch (Exception ignore) {
         }
 
@@ -377,11 +379,10 @@ public class TestProjectApi extends AbstractIntegrationTest {
     @Test
     public void testListStarredProjectsWithParams() throws GitLabApiException {
 
-        Project project = gitLabApi.getProjectApi().getProject(TEST_NAMESPACE, TEST_PROJECT_NAME);
-        assertNotNull(project);
+        assumeNotNull(testProject);
 
         try {
-            gitLabApi.getProjectApi().starProject(project);
+            gitLabApi.getProjectApi().starProject(testProject);
         } catch (Exception ignore) {
         }
 
@@ -389,7 +390,7 @@ public class TestProjectApi extends AbstractIntegrationTest {
                 Constants.ProjectOrderBy.NAME, Constants.SortOrder.DESC, TEST_PROJECT_NAME, true, true, true, true, true);
 
         try {
-            gitLabApi.getProjectApi().unstarProject(project);
+            gitLabApi.getProjectApi().unstarProject(testProject);
         } catch (Exception ignore) {
         }
 
@@ -493,25 +494,21 @@ public class TestProjectApi extends AbstractIntegrationTest {
 
         assumeTrue(TEST_GROUP != null && TEST_GROUP_PROJECT != null);
         assumeTrue(TEST_GROUP.trim().length() > 0 && TEST_GROUP_PROJECT.trim().length() > 0);
-
-        Project project = gitLabApi.getProjectApi().getProject(TEST_NAMESPACE, TEST_PROJECT_NAME);
-        assertNotNull(project);
+        assumeNotNull(testProject);
 
         List<Group> groups = gitLabApi.getGroupApi().getGroups(TEST_GROUP);
         assertNotNull(groups);
 
         Group shareGroup = groups.get(0);
-        gitLabApi.getProjectApi().shareProject(project.getId(), shareGroup.getId(), AccessLevel.DEVELOPER, null);
-        gitLabApi.getProjectApi().unshareProject(project.getId(), shareGroup.getId());
+        gitLabApi.getProjectApi().shareProject(testProject, shareGroup.getId(), AccessLevel.DEVELOPER, null);
+        gitLabApi.getProjectApi().unshareProject(testProject, shareGroup.getId());
     }
 
     @Test
     public void testArchiveProject() throws GitLabApiException {
-        Project project = gitLabApi.getProjectApi().getProject(TEST_NAMESPACE, TEST_PROJECT_NAME);
-        assertNotNull(project);
-
-        assertEquals(true, gitLabApi.getProjectApi().archiveProject(project.getId()).getArchived());
-        assertEquals(false, gitLabApi.getProjectApi().unarchiveProject(project.getId()).getArchived());
+        assertNotNull(testProject);
+        assertEquals(true, gitLabApi.getProjectApi().archiveProject(testProject.getId()).getArchived());
+        assertEquals(false, gitLabApi.getProjectApi().unarchiveProject(testProject).getArchived());
     }
 
     @Test
@@ -542,19 +539,18 @@ public class TestProjectApi extends AbstractIntegrationTest {
     @Test
     public void testStarAndUnstarProject() throws GitLabApiException {
 
-        Project project = gitLabApi.getProjectApi().getProject(TEST_NAMESPACE, TEST_PROJECT_NAME);
-        assertNotNull(project);
+        assumeNotNull(testProject);
 
         try {
-            gitLabApi.getProjectApi().unstarProject(project);
+            gitLabApi.getProjectApi().unstarProject(testProject);
         } catch (Exception ignore) {
         }
 
-        Project starredProject = gitLabApi.getProjectApi().starProject(project);
+        Project starredProject = gitLabApi.getProjectApi().starProject(testProject);
         assertNotNull(starredProject);
         assertEquals(1, (int)starredProject.getStarCount());
 
-        Project unstarredProject = gitLabApi.getProjectApi().unstarProject(project);
+        Project unstarredProject = gitLabApi.getProjectApi().unstarProject(testProject);
         assertNotNull(unstarredProject);
         assertEquals(0, (int)unstarredProject.getStarCount());
     }
@@ -582,18 +578,17 @@ public class TestProjectApi extends AbstractIntegrationTest {
     @Test
     public void testVariables() throws GitLabApiException {
 
-        Project project = gitLabApi.getProjectApi().getProject(TEST_NAMESPACE, TEST_PROJECT_NAME);
-        assertNotNull(project);
+        assumeNotNull(testProject);
 
         String key = TEST_VARIABLE_KEY_PREFIX + HelperUtils.getRandomInt() + "_" +  HelperUtils.getRandomInt();
         String value = "TEST_VARIABLE_VALUE_" + HelperUtils.getRandomInt() + "_" +  HelperUtils.getRandomInt();
-        Variable variable = gitLabApi.getProjectApi().createVariable(project, key, value, null, null);
+        Variable variable = gitLabApi.getProjectApi().createVariable(testProject, key, value, null, null);
 
         assertNotNull(variable);
         assertEquals(key, variable.getKey());
         assertEquals(value, variable.getValue());
 
-        Stream<Variable> variables = gitLabApi.getProjectApi().getVariablesStream(project);
+        Stream<Variable> variables = gitLabApi.getProjectApi().getVariablesStream(testProject);
         assertNotNull(variables);
 
         Variable matchingVariable = variables.filter(v -> v.getKey().equals(key)).findAny().orElse(null);
@@ -603,19 +598,43 @@ public class TestProjectApi extends AbstractIntegrationTest {
         assertFalse(matchingVariable.getProtected());
         assertNull(matchingVariable.getEnvironmentScope());
 
-        gitLabApi.getProjectApi().updateVariable(project, key, "NONE", true, "DEV");
-        variable = gitLabApi.getProjectApi().getVariable(project, key);
+        gitLabApi.getProjectApi().updateVariable(testProject, key, "NONE", true, "DEV");
+        variable = gitLabApi.getProjectApi().getVariable(testProject, key);
 
         assertNotNull(variable);
         assertEquals(key, variable.getKey());
         assertEquals("NONE", variable.getValue());
         assertTrue(variable.getProtected());
 
-        gitLabApi.getProjectApi().deleteVariable(project, key);
-        variables = gitLabApi.getProjectApi().getVariablesStream(project);
+        gitLabApi.getProjectApi().deleteVariable(testProject, key);
+        variables = gitLabApi.getProjectApi().getVariablesStream(testProject);
         assertNotNull(variables);
 
         matchingVariable = variables.filter(v -> v.getKey().equals(key)).findAny().orElse(null);
         assertNull(matchingVariable);
     }
+
+    @Test
+    public void testGetMembers() throws GitLabApiException {
+
+        assumeNotNull(testProject);
+
+        // Act
+        List<Member> members = gitLabApi.getProjectApi().getMembers(testProject);
+
+        // Assert
+        assertNotNull(members);
+    }
+
+    @Test
+    public void testAllMemberOperations() throws GitLabApiException {
+
+        assumeNotNull(testProject);
+
+        // Act
+        List<Member> members = gitLabApi.getProjectApi().getAllMembers(testProject);
+
+        // Assert
+        assertNotNull(members);
+    }
 }