diff --git a/spiffworkflow-backend/src/spiffworkflow_backend/api.yml b/spiffworkflow-backend/src/spiffworkflow_backend/api.yml
index b954d5db2..46a7cd0dd 100755
--- a/spiffworkflow-backend/src/spiffworkflow_backend/api.yml
+++ b/spiffworkflow-backend/src/spiffworkflow_backend/api.yml
@@ -1499,6 +1499,7 @@ paths:
               schema:
                 $ref: "#/components/schemas/OkTrue"
 
+  # NOT USED
   /tasks:
     parameters:
       - name: process_instance_id
@@ -1662,6 +1663,41 @@ paths:
                 items:
                   $ref: "#/components/schemas/Task"
 
+  /tasks/completed/{process_instance_id}:
+    parameters:
+      - name: page
+        in: query
+        required: false
+        description: The page number to return. Defaults to page 1.
+        schema:
+          type: integer
+      - name: per_page
+        in: query
+        required: false
+        description: The page number to return. Defaults to page 1.
+        schema:
+          type: integer
+      - name: process_instance_id
+        in: path
+        required: true
+        description: The unique id of an existing process instance.
+        schema:
+          type: integer
+    get:
+      tags:
+        - Process Instances
+      operationId: spiffworkflow_backend.routes.tasks_controller.task_list_completed
+      summary: returns the list of tasks for that the current user has completed
+      responses:
+        "200":
+          description: list of tasks
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: "#/components/schemas/Task"
+
   /users/search:
     parameters:
       - name: username_prefix
diff --git a/spiffworkflow-backend/src/spiffworkflow_backend/routes/tasks_controller.py b/spiffworkflow-backend/src/spiffworkflow_backend/routes/tasks_controller.py
index 9a6640519..752909bc4 100644
--- a/spiffworkflow-backend/src/spiffworkflow_backend/routes/tasks_controller.py
+++ b/spiffworkflow-backend/src/spiffworkflow_backend/routes/tasks_controller.py
@@ -174,6 +174,41 @@ def task_list_completed_by_me(process_instance_id: int, page: int = 1, per_page:
     return make_response(jsonify(response_json), 200)
 
 
+def task_list_completed(process_instance_id: int, page: int = 1, per_page: int = 100) -> flask.wrappers.Response:
+    human_tasks_query = (
+        db.session.query(HumanTaskModel)  # type: ignore
+        .join(UserModel, UserModel.id == HumanTaskModel.completed_by_user_id)
+        .filter(
+            HumanTaskModel.completed == True,  # noqa: E712
+            HumanTaskModel.process_instance_id == process_instance_id,
+        )
+        .add_columns(
+            HumanTaskModel.task_name,
+            HumanTaskModel.task_title,
+            HumanTaskModel.process_model_display_name,
+            HumanTaskModel.process_instance_id,
+            HumanTaskModel.updated_at_in_seconds,
+            HumanTaskModel.created_at_in_seconds,
+            UserModel.username.label("completed_by_username"),  # type: ignore
+        )
+    )
+
+    human_tasks = human_tasks_query.order_by(desc(HumanTaskModel.id)).paginate(  # type: ignore
+        page=page, per_page=per_page, error_out=False
+    )
+
+    response_json = {
+        "results": human_tasks.items,
+        "pagination": {
+            "count": len(human_tasks.items),
+            "total": human_tasks.total,
+            "pages": human_tasks.pages,
+        },
+    }
+
+    return make_response(jsonify(response_json), 200)
+
+
 def task_list_for_my_open_processes(page: int = 1, per_page: int = 100) -> flask.wrappers.Response:
     return _get_tasks(page=page, per_page=per_page)
 
diff --git a/spiffworkflow-frontend/src/components/TaskListTable.tsx b/spiffworkflow-frontend/src/components/TaskListTable.tsx
index 075853b67..4c780f6f5 100644
--- a/spiffworkflow-frontend/src/components/TaskListTable.tsx
+++ b/spiffworkflow-frontend/src/components/TaskListTable.tsx
@@ -40,6 +40,7 @@ type OwnProps = {
   canCompleteAllTasks?: boolean;
   showActionsColumn?: boolean;
   showViewFormDataButton?: boolean;
+  showCompletedBy?: boolean;
 };
 
 export default function TaskListTable({
@@ -63,6 +64,7 @@ export default function TaskListTable({
   canCompleteAllTasks = false,
   showActionsColumn = true,
   showViewFormDataButton = false,
+  showCompletedBy = false,
 }: OwnProps) {
   const [searchParams] = useSearchParams();
   const [tasks, setTasks] = useState<ProcessInstanceTask[] | null>(null);
@@ -249,9 +251,8 @@ export default function TaskListTable({
     }
   };
 
-  const getTableRow = (processInstanceTask: ProcessInstanceTask) => {
+  const getActionButtons = (processInstanceTask: ProcessInstanceTask) => {
     const taskUrl = `/tasks/${processInstanceTask.process_instance_id}/${processInstanceTask.task_id}`;
-
     const regex = new RegExp(`\\b(${preferredUsername}|${userEmail})\\b`);
     let hasAccessToCompleteTask = false;
     if (
@@ -260,6 +261,40 @@ export default function TaskListTable({
     ) {
       hasAccessToCompleteTask = true;
     }
+
+    const actions = [];
+    if (
+      !(
+        processInstanceTask.process_instance_status in
+        ['suspended', 'completed', 'error']
+      ) &&
+      !processInstanceTask.completed
+    ) {
+      actions.push(
+        <Button
+          variant="primary"
+          href={taskUrl}
+          disabled={!hasAccessToCompleteTask}
+          size="sm"
+        >
+          Go
+        </Button>
+      );
+    }
+    if (showViewFormDataButton) {
+      actions.push(
+        <Button
+          variant="primary"
+          onClick={() => getFormSubmissionDataForTask(processInstanceTask)}
+        >
+          View task
+        </Button>
+      );
+    }
+    return actions;
+  };
+
+  const getTableRow = (processInstanceTask: ProcessInstanceTask) => {
     const rowElements: ReactElement[] = [];
 
     dealWithProcessCells(rowElements, processInstanceTask);
@@ -283,6 +318,9 @@ export default function TaskListTable({
         <td>{getWaitingForTableCellComponent(processInstanceTask)}</td>
       );
     }
+    if (showCompletedBy) {
+      rowElements.push(<td>{processInstanceTask.completed_by_username}</td>);
+    }
     if (showDateStarted) {
       rowElements.push(
         <td>
@@ -300,36 +338,7 @@ export default function TaskListTable({
       );
     }
     if (showActionsColumn) {
-      const actions = [];
-      if (
-        !(
-          processInstanceTask.process_instance_status in
-          ['suspended', 'completed', 'error']
-        ) &&
-        !processInstanceTask.completed
-      ) {
-        actions.push(
-          <Button
-            variant="primary"
-            href={taskUrl}
-            disabled={!hasAccessToCompleteTask}
-            size="sm"
-          >
-            Go
-          </Button>
-        );
-      }
-      if (showViewFormDataButton) {
-        actions.push(
-          <Button
-            variant="primary"
-            onClick={() => getFormSubmissionDataForTask(processInstanceTask)}
-          >
-            View task
-          </Button>
-        );
-      }
-      rowElements.push(<td>{actions}</td>);
+      rowElements.push(<td>{getActionButtons(processInstanceTask)}</td>);
     }
     return <tr key={processInstanceTask.id}>{rowElements}</tr>;
   };
@@ -349,6 +358,9 @@ export default function TaskListTable({
     if (showWaitingOn) {
       tableHeaders.push('Waiting for');
     }
+    if (showCompletedBy) {
+      tableHeaders.push('Completed by');
+    }
     if (showDateStarted) {
       tableHeaders.push('Date started');
     }
diff --git a/spiffworkflow-frontend/src/interfaces.ts b/spiffworkflow-frontend/src/interfaces.ts
index 476afcb0e..dbd3eb079 100644
--- a/spiffworkflow-frontend/src/interfaces.ts
+++ b/spiffworkflow-frontend/src/interfaces.ts
@@ -131,6 +131,9 @@ export interface ProcessInstanceTask {
   task_title?: string;
   task_name?: string;
   completed?: boolean;
+
+  // gets shoved onto HumanTaskModel in result
+  completed_by_username?: string;
 }
 
 export interface ProcessReference {
diff --git a/spiffworkflow-frontend/src/routes/ProcessInstanceShow.tsx b/spiffworkflow-frontend/src/routes/ProcessInstanceShow.tsx
index 7c0de6803..9a24c0ed0 100644
--- a/spiffworkflow-frontend/src/routes/ProcessInstanceShow.tsx
+++ b/spiffworkflow-frontend/src/routes/ProcessInstanceShow.tsx
@@ -118,6 +118,7 @@ export default function ProcessInstanceShow({ variant }: OwnProps) {
   >(null);
 
   const [selectedTabIndex, setSelectedTabIndex] = useState<number>(0);
+  const [selectedTaskTabSubTab, setSelectedTaskTabSubTab] = useState<number>(0);
   const [copiedShortLinkToClipboard, setCopiedShortLinkToClipboard] =
     useState<boolean>(false);
 
@@ -250,6 +251,11 @@ export default function ProcessInstanceShow({ variant }: OwnProps) {
     if (searchParams.get('tab')) {
       setSelectedTabIndex(parseInt(searchParams.get('tab') || '0', 10));
     }
+    if (searchParams.get('taskSubTab')) {
+      setSelectedTaskTabSubTab(
+        parseInt(searchParams.get('taskSubTab') || '0', 10)
+      );
+    }
     return undefined;
   }, [
     permissionsLoaded,
@@ -1475,6 +1481,67 @@ export default function ProcessInstanceShow({ variant }: OwnProps) {
     updateSearchParams(newTabIndex.selectedIndex, 'tab');
   };
 
+  const updateSelectedTaskTabSubTab = (newTabIndex: any) => {
+    updateSearchParams(newTabIndex.selectedIndex, 'taskSubTab');
+  };
+
+  const taskTabSubTabs = () => {
+    if (!processInstance) {
+      return null;
+    }
+
+    return (
+      <Tabs
+        selectedIndex={selectedTaskTabSubTab}
+        onChange={updateSelectedTaskTabSubTab}
+      >
+        <TabList aria-label="List of tabs">
+          <Tab>Completed by me</Tab>
+          <Tab>All completed</Tab>
+        </TabList>
+        <TabPanels>
+          <TabPanel>
+            {selectedTaskTabSubTab === 0 ? (
+              <TaskListTable
+                apiPath={`/tasks/completed-by-me/${processInstance.id}`}
+                paginationClassName="with-large-bottom-margin"
+                textToShowIfEmpty="You have not completed any tasks for this process instance."
+                shouldPaginateTable={false}
+                showProcessModelIdentifier={false}
+                showProcessId={false}
+                showStartedBy={false}
+                showTableDescriptionAsTooltip
+                showDateStarted={false}
+                showWaitingOn={false}
+                canCompleteAllTasks={false}
+                showViewFormDataButton
+              />
+            ) : null}
+          </TabPanel>
+          <TabPanel>
+            {selectedTaskTabSubTab === 1 ? (
+              <TaskListTable
+                apiPath={`/tasks/completed/${processInstance.id}`}
+                paginationClassName="with-large-bottom-margin"
+                textToShowIfEmpty="There are no completed tasks for this process instance."
+                shouldPaginateTable={false}
+                showProcessModelIdentifier={false}
+                showProcessId={false}
+                showStartedBy={false}
+                showTableDescriptionAsTooltip
+                showDateStarted={false}
+                showWaitingOn={false}
+                canCompleteAllTasks={false}
+                showCompletedBy
+                showActionsColumn={false}
+              />
+            ) : null}
+          </TabPanel>
+        </TabPanels>
+      </Tabs>
+    );
+  };
+
   if (processInstance && (tasks || tasksCallHadError) && permissionsLoaded) {
     const processModelId = unModifyProcessIdentifierForPathParam(
       params.process_model_id ? params.process_model_id : ''
@@ -1505,7 +1572,7 @@ export default function ProcessInstanceShow({ variant }: OwnProps) {
             <Tab disabled={!canViewLogs}>Milestones</Tab>
             <Tab disabled={!canViewLogs}>Events</Tab>
             <Tab disabled={!canViewMsgs}>Messages</Tab>
-            <Tab>My completed tasks</Tab>
+            <Tab>Tasks</Tab>
           </TabList>
           <TabPanels>
             <TabPanel>
@@ -1537,22 +1604,7 @@ export default function ProcessInstanceShow({ variant }: OwnProps) {
               {selectedTabIndex === 3 ? getMessageDisplay() : null}
             </TabPanel>
             <TabPanel>
-              {selectedTabIndex === 4 ? (
-                <TaskListTable
-                  apiPath={`/tasks/completed-by-me/${processInstance.id}`}
-                  paginationClassName="with-large-bottom-margin"
-                  textToShowIfEmpty="You have not completed any tasks for this process instance."
-                  shouldPaginateTable={false}
-                  showProcessModelIdentifier={false}
-                  showProcessId={false}
-                  showStartedBy={false}
-                  showTableDescriptionAsTooltip
-                  showDateStarted={false}
-                  showWaitingOn={false}
-                  canCompleteAllTasks={false}
-                  showViewFormDataButton
-                />
-              ) : null}
+              {selectedTabIndex === 4 ? taskTabSubTabs() : null}
             </TabPanel>
           </TabPanels>
         </Tabs>