diff --git a/atst/domain/environments.py b/atst/domain/environments.py
index ec5fd701..38e23ff1 100644
--- a/atst/domain/environments.py
+++ b/atst/domain/environments.py
@@ -85,3 +85,13 @@ class Environments(object):
                 db.session.add(env_role)
 
         db.session.commit()
+
+    @classmethod
+    def revoke_access(cls, user, environment, target_user):
+        Authorization.check_workspace_permission(
+            user,
+            environment.workspace,
+            Permissions.REMOVE_CSP_ROLES,
+            "revoke environment access",
+        )
+        EnvironmentRoles.delete(environment.id, target_user.id)
diff --git a/atst/domain/workspace_roles.py b/atst/domain/workspace_roles.py
index 131cbac9..38763e4c 100644
--- a/atst/domain/workspace_roles.py
+++ b/atst/domain/workspace_roles.py
@@ -33,6 +33,13 @@ class WorkspaceRoles(object):
 
         return workspace_role
 
+    @classmethod
+    def get_by_id(cls, id_):
+        try:
+            return db.session.query(WorkspaceRole).filter(WorkspaceRole.id == id_).one()
+        except NoResultFound:
+            raise NotFoundError("workspace_role")
+
     @classmethod
     def _get_active_workspace_role(cls, workspace_id, user_id):
         try:
diff --git a/atst/domain/workspaces/__init__.py b/atst/domain/workspaces/__init__.py
index a9757dc5..b2d10ac7 100644
--- a/atst/domain/workspaces/__init__.py
+++ b/atst/domain/workspaces/__init__.py
@@ -1 +1 @@
-from .workspaces import Workspaces
+from .workspaces import Workspaces, WorkspaceError
diff --git a/atst/domain/workspaces/workspaces.py b/atst/domain/workspaces/workspaces.py
index 6c43bc3b..d8960a3d 100644
--- a/atst/domain/workspaces/workspaces.py
+++ b/atst/domain/workspaces/workspaces.py
@@ -3,12 +3,17 @@ from atst.domain.authz import Authorization
 from atst.models.permissions import Permissions
 from atst.domain.users import Users
 from atst.domain.workspace_roles import WorkspaceRoles
+from atst.domain.environments import Environments
 from atst.models.workspace_role import Status as WorkspaceRoleStatus
 
 from .query import WorkspacesQuery
 from .scopes import ScopedWorkspace
 
 
+class WorkspaceError(Exception):
+    pass
+
+
 class Workspaces(object):
     @classmethod
     def create(cls, request, name=None):
@@ -138,3 +143,28 @@ class Workspaces(object):
             workspace.name = new_data["name"]
 
         WorkspacesQuery.add_and_commit(workspace)
+
+    @classmethod
+    def can_revoke_access_for(cls, workspace, workspace_role):
+        return workspace_role.user != workspace.owner
+
+    @classmethod
+    def revoke_access(cls, user, workspace_id, workspace_role_id):
+        workspace = WorkspacesQuery.get(workspace_id)
+        Authorization.check_workspace_permission(
+            user,
+            workspace,
+            Permissions.ASSIGN_AND_UNASSIGN_ATAT_ROLE,
+            "revoke workspace access",
+        )
+        workspace_role = WorkspaceRoles.get_by_id(workspace_role_id)
+
+        if not Workspaces.can_revoke_access_for(workspace, workspace_role):
+            raise WorkspaceError("cannot revoke workspace access for this user")
+
+        workspace_role.status = WorkspaceRoleStatus.DISABLED
+        for environment in workspace.all_environments:
+            Environments.revoke_access(user, environment, workspace_role.user)
+        WorkspacesQuery.add_and_commit(workspace_role)
+
+        return workspace_role
diff --git a/atst/models/environment.py b/atst/models/environment.py
index 7fa079ac..c5eaf98b 100644
--- a/atst/models/environment.py
+++ b/atst/models/environment.py
@@ -27,6 +27,10 @@ class Environment(Base, mixins.TimestampsMixin, mixins.AuditableMixin):
     def displayname(self):
         return self.name
 
+    @property
+    def workspace(self):
+        return self.project.workspace
+
     def auditable_workspace_id(self):
         return self.project.workspace_id
 
diff --git a/atst/models/workspace.py b/atst/models/workspace.py
index 5b907ba5..1a29a6da 100644
--- a/atst/models/workspace.py
+++ b/atst/models/workspace.py
@@ -1,16 +1,17 @@
 from sqlalchemy import Column, ForeignKey, String
 from sqlalchemy.orm import relationship
+from itertools import chain
 
-from atst.models import Base
-from atst.models.types import Id
-from atst.models import mixins
+from atst.models import Base, mixins, types
+from atst.models.workspace_role import WorkspaceRole, Status as WorkspaceRoleStatus
 from atst.utils import first_or_none
+from atst.database import db
 
 
 class Workspace(Base, mixins.TimestampsMixin, mixins.AuditableMixin):
     __tablename__ = "workspaces"
 
-    id = Id()
+    id = types.Id()
     name = Column(String)
     request_id = Column(ForeignKey("requests.id"), nullable=False)
     projects = relationship("Project", back_populates="workspace")
@@ -38,12 +39,21 @@ class Workspace(Base, mixins.TimestampsMixin, mixins.AuditableMixin):
 
     @property
     def members(self):
-        return self.roles
+        return (
+            db.session.query(WorkspaceRole)
+            .filter(WorkspaceRole.workspace_id == self.id)
+            .filter(WorkspaceRole.status != WorkspaceRoleStatus.DISABLED)
+            .all()
+        )
 
     @property
     def displayname(self):
         return self.name
 
+    @property
+    def all_environments(self):
+        return list(chain.from_iterable(p.environments for p in self.projects))
+
     def auditable_workspace_id(self):
         return self.id
 
diff --git a/atst/models/workspace_role.py b/atst/models/workspace_role.py
index 4bd241df..692cafbb 100644
--- a/atst/models/workspace_role.py
+++ b/atst/models/workspace_role.py
@@ -20,6 +20,7 @@ MEMBER_STATUSES = {
     "error": "Error on invite",
     "pending": "Pending",
     "unknown": "Unknown errors",
+    "disabled": "Disabled",
 }
 
 
@@ -83,6 +84,8 @@ class WorkspaceRole(Base, mixins.TimestampsMixin, mixins.AuditableMixin):
     def display_status(self):
         if self.status == Status.ACTIVE:
             return MEMBER_STATUSES["active"]
+        elif self.status == Status.DISABLED:
+            return MEMBER_STATUSES["disabled"]
         elif self.latest_invitation:
             if self.latest_invitation.is_revoked:
                 return MEMBER_STATUSES["revoked"]
diff --git a/atst/routes/errors.py b/atst/routes/errors.py
index 3f32b110..cff729bf 100644
--- a/atst/routes/errors.py
+++ b/atst/routes/errors.py
@@ -8,6 +8,7 @@ from atst.domain.invitations import (
     ExpiredError as InvitationExpiredError,
     WrongUserError as InvitationWrongUserError,
 )
+from atst.domain.workspaces import WorkspaceError
 
 
 def log_error(e):
@@ -24,6 +25,7 @@ def make_error_pages(app):
     @app.errorhandler(werkzeug_exceptions.NotFound)
     @app.errorhandler(exceptions.NotFoundError)
     @app.errorhandler(exceptions.UnauthorizedError)
+    @app.errorhandler(WorkspaceError)
     # pylint: disable=unused-variable
     def not_found(e):
         return handle_error(e)
diff --git a/atst/routes/workspaces/members.py b/atst/routes/workspaces/members.py
index b09e943d..829cbf1d 100644
--- a/atst/routes/workspaces/members.py
+++ b/atst/routes/workspaces/members.py
@@ -168,3 +168,17 @@ def update_member(workspace_id, member_id):
             workspace=workspace,
             member=member,
         )
+
+
+@workspaces_bp.route(
+    "/workspaces/<workspace_id>/members/<member_id>/revoke_access", methods=["POST"]
+)
+def revoke_access(workspace_id, member_id):
+    revoked_role = Workspaces.revoke_access(g.current_user, workspace_id, member_id)
+    return redirect(
+        url_for(
+            "workspaces.workspace_members",
+            workspace_id=workspace_id,
+            revokedMemberName=revoked_role.user_name,
+        )
+    )
diff --git a/templates/workspaces/members/edit.html b/templates/workspaces/members/edit.html
index f83149d3..993e396d 100644
--- a/templates/workspaces/members/edit.html
+++ b/templates/workspaces/members/edit.html
@@ -53,6 +53,14 @@
               confirm_msg="Are you sure? This will send an email to invite the user to join this workspace."
         )}}
       {% endif %}
+      {% if can_revoke_access %}
+        {{ ConfirmationButton (
+              "Remove Workspace Access",
+              url_for("workspaces.revoke_access", workspace_id=workspace.id, member_id=member.id),
+              form.csrf_token,
+              confirm_msg="Are you sure? This will remove this user from the workspace.",
+        )}}
+      {% endif %}
       </div>
     </div>
   </div>
diff --git a/templates/workspaces/members/index.html b/templates/workspaces/members/index.html
index 0c2c17a2..b1698f60 100644
--- a/templates/workspaces/members/index.html
+++ b/templates/workspaces/members/index.html
@@ -44,6 +44,17 @@
   ) }}
 {% endif %}
 
+{% if revoked_member_name %}
+    {% set message -%}
+      <p>Removed {{ revoked_member_name }} from this workspace.</p>
+    {%- endset %}
+
+  {{ Alert('Removed workspace access',
+    message=message,
+    level='success'
+  ) }}
+{% endif %}
+
 {% set member_name = request.args.get("memberName") %}
 {% set updated_role = request.args.get("updatedRole") %}
 {% if updated_role %}
diff --git a/tests/domain/test_workspaces.py b/tests/domain/test_workspaces.py
index 901089b0..61cb7b52 100644
--- a/tests/domain/test_workspaces.py
+++ b/tests/domain/test_workspaces.py
@@ -2,7 +2,7 @@ import pytest
 from uuid import uuid4
 
 from atst.domain.exceptions import NotFoundError, UnauthorizedError
-from atst.domain.workspaces import Workspaces
+from atst.domain.workspaces import Workspaces, WorkspaceError
 from atst.domain.workspace_roles import WorkspaceRoles
 from atst.domain.projects import Projects
 from atst.domain.environments import Environments
@@ -11,8 +11,8 @@ from atst.models.workspace_role import Status as WorkspaceRoleStatus
 from tests.factories import (
     RequestFactory,
     UserFactory,
-    InvitationFactory,
     WorkspaceRoleFactory,
+    WorkspaceFactory,
 )
 
 
@@ -302,3 +302,38 @@ def test_can_create_workspaces_with_matching_names():
     workspace_name = "Great Workspace"
     Workspaces.create(RequestFactory.create(), name=workspace_name)
     Workspaces.create(RequestFactory.create(), name=workspace_name)
+
+
+def test_can_revoke_workspace_access():
+    workspace = WorkspaceFactory.create()
+    workspace_role = WorkspaceRoleFactory.create(workspace=workspace)
+    Workspaces.revoke_access(workspace.owner, workspace.id, workspace_role.id)
+    assert Workspaces.for_user(workspace_role.user) == []
+
+
+def test_can_revoke_access():
+    workspace = WorkspaceFactory.create()
+    owner_role = workspace.roles[0]
+    workspace_role = WorkspaceRoleFactory.create(workspace=workspace)
+
+    assert Workspaces.can_revoke_access_for(workspace, workspace_role)
+    assert not Workspaces.can_revoke_access_for(workspace, owner_role)
+
+
+def test_cant_revoke_owner_workspace_access():
+    workspace = WorkspaceFactory.create()
+    owner_workspace_role = workspace.roles[0]
+
+    with pytest.raises(WorkspaceError):
+        Workspaces.revoke_access(workspace.owner, workspace.id, owner_workspace_role.id)
+
+
+def test_disabled_members_dont_show_up(session):
+    workspace = WorkspaceFactory.create()
+    WorkspaceRoleFactory.create(workspace=workspace, status=WorkspaceRoleStatus.ACTIVE)
+    WorkspaceRoleFactory.create(
+        workspace=workspace, status=WorkspaceRoleStatus.DISABLED
+    )
+
+    # should only return workspace owner and ACTIVE member
+    assert len(workspace.members) == 2
diff --git a/tests/models/test_workspace_role.py b/tests/models/test_workspace_role.py
index 990c8e0b..4ccc0529 100644
--- a/tests/models/test_workspace_role.py
+++ b/tests/models/test_workspace_role.py
@@ -3,7 +3,6 @@ import datetime
 from atst.domain.environments import Environments
 from atst.domain.workspaces import Workspaces
 from atst.domain.projects import Projects
-from atst.domain.workspace_roles import WorkspaceRoles
 from atst.models.workspace_role import Status
 from atst.models.role import Role
 from atst.models.invitation import Status as InvitationStatus
@@ -16,7 +15,9 @@ from tests.factories import (
     EnvironmentFactory,
     EnvironmentRoleFactory,
     ProjectFactory,
+    WorkspaceFactory,
 )
+from atst.domain.workspace_roles import WorkspaceRoles
 
 
 def test_has_no_ws_role_history(session):
@@ -234,3 +235,36 @@ def test_can_resend_invitation_if_expired():
         invitations=[InvitationFactory.create(status=InvitationStatus.REJECTED_EXPIRED)]
     )
     assert workspace_role.can_resend_invitation
+
+
+def test_can_list_all_environments():
+    workspace = WorkspaceFactory.create(
+        projects=[
+            {
+                "name": "project1",
+                "environments": [
+                    {"name": "dev"},
+                    {"name": "staging"},
+                    {"name": "prod"},
+                ],
+            },
+            {
+                "name": "project2",
+                "environments": [
+                    {"name": "dev"},
+                    {"name": "staging"},
+                    {"name": "prod"},
+                ],
+            },
+            {
+                "name": "project3",
+                "environments": [
+                    {"name": "dev"},
+                    {"name": "staging"},
+                    {"name": "prod"},
+                ],
+            },
+        ]
+    )
+
+    assert len(workspace.all_environments) == 9
diff --git a/tests/routes/workspaces/test_members.py b/tests/routes/workspaces/test_members.py
index 1816ecad..0d3b3901 100644
--- a/tests/routes/workspaces/test_members.py
+++ b/tests/routes/workspaces/test_members.py
@@ -168,3 +168,24 @@ def test_update_member_environment_role_with_no_data(client, user_session):
     )
     assert response.status_code == 200
     assert EnvironmentRoles.get(user.id, env1_id).role == "developer"
+
+
+def test_revoke_member_access(client, user_session):
+    workspace = WorkspaceFactory.create()
+    user = UserFactory.create()
+    member = WorkspaceRoles.add(user, workspace.id, "developer")
+    Projects.create(
+        workspace.owner,
+        workspace,
+        "Snazzy Project",
+        "A new project for me and my friends",
+        {"env1"},
+    )
+    user_session(workspace.owner)
+    response = client.post(
+        url_for(
+            "workspaces.revoke_access", workspace_id=workspace.id, member_id=member.id
+        )
+    )
+    assert response.status_code == 302
+    assert WorkspaceRoles.get_by_id(member.id).num_environment_roles == 0