diff --git a/github/orgs_members.go b/github/orgs_members.go
index 01a78c0..554cb1d 100644
--- a/github/orgs_members.go
+++ b/github/orgs_members.go
@@ -142,7 +142,8 @@ func (s *OrganizationsService) RemoveMember(org, user string) (*Response, error)
 	return s.client.Do(req, nil)
 }
 
-// PublicizeMembership publicizes a user's membership in an organization.
+// PublicizeMembership publicizes a user's membership in an organization. (A
+// user cannot publicize the membership for another user.)
 //
 // GitHub API docs: http://developer.github.com/v3/orgs/members/#publicize-a-users-membership
 func (s *OrganizationsService) PublicizeMembership(org, user string) (*Response, error) {
@@ -202,12 +203,20 @@ func (s *OrganizationsService) ListOrgMemberships(opt *ListOrgMembershipsOptions
 	return memberships, resp, err
 }
 
-// GetOrgMembership gets the membership for the authenticated user for the
-// specified organization.
+// GetOrgMembership gets the membership for a user in a specified organization.
+// Passing an empty string for user will get the membership for the
+// authenticated user.
 //
+// GitHub API docs: https://developer.github.com/v3/orgs/members/#get-organization-membership
 // GitHub API docs: https://developer.github.com/v3/orgs/members/#get-your-organization-membership
-func (s *OrganizationsService) GetOrgMembership(org string) (*Membership, *Response, error) {
-	u := fmt.Sprintf("user/memberships/orgs/%v", org)
+func (s *OrganizationsService) GetOrgMembership(user, org string) (*Membership, *Response, error) {
+	var u string
+	if user != "" {
+		u = fmt.Sprintf("orgs/%v/memberships/%v", org, user)
+	} else {
+		u = fmt.Sprintf("user/memberships/orgs/%v", org)
+	}
+
 	req, err := s.client.NewRequest("GET", u, nil)
 	if err != nil {
 		return nil, nil, err
@@ -222,12 +231,20 @@ func (s *OrganizationsService) GetOrgMembership(org string) (*Membership, *Respo
 	return membership, resp, err
 }
 
-// EditOrgMembership edits the membership for the authenticated user for the
-// specified organization.
+// EditOrgMembership edits the membership for user in specified organization.
+// Passing an empty string for user will edit the membership for the
+// authenticated user.
 //
+// GitHub API docs: https://developer.github.com/v3/orgs/members/#add-or-update-organization-membership
 // GitHub API docs: https://developer.github.com/v3/orgs/members/#edit-your-organization-membership
-func (s *OrganizationsService) EditOrgMembership(org string, membership *Membership) (*Membership, *Response, error) {
-	u := fmt.Sprintf("user/memberships/orgs/%v", org)
+func (s *OrganizationsService) EditOrgMembership(user, org string, membership *Membership) (*Membership, *Response, error) {
+	var u string
+	if user != "" {
+		u = fmt.Sprintf("orgs/%v/memberships/%v", org, user)
+	} else {
+		u = fmt.Sprintf("user/memberships/orgs/%v", org)
+	}
+
 	req, err := s.client.NewRequest("PATCH", u, membership)
 	if err != nil {
 		return nil, nil, err
@@ -241,3 +258,17 @@ func (s *OrganizationsService) EditOrgMembership(org string, membership *Members
 
 	return m, resp, err
 }
+
+// RemoveOrgMembership removes user from the specified organization.  If the
+// user has been invited to the organization, this will cancel their invitation.
+//
+// GitHub API docs: https://developer.github.com/v3/orgs/members/#remove-organization-membership
+func (s *OrganizationsService) RemoveOrgMembership(user, org string) (*Response, error) {
+	u := fmt.Sprintf("orgs/%v/memberships/%v", org, user)
+	req, err := s.client.NewRequest("DELETE", u, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return s.client.Do(req, nil)
+}
diff --git a/github/orgs_members_test.go b/github/orgs_members_test.go
index 2bec813..973e3aa 100644
--- a/github/orgs_members_test.go
+++ b/github/orgs_members_test.go
@@ -242,7 +242,7 @@ func TestOrganizationsService_ListOrgMemberships(t *testing.T) {
 	}
 }
 
-func TestOrganizationsService_GetOrgMembership(t *testing.T) {
+func TestOrganizationsService_GetOrgMembership_AuthenticatedUser(t *testing.T) {
 	setup()
 	defer teardown()
 
@@ -251,7 +251,7 @@ func TestOrganizationsService_GetOrgMembership(t *testing.T) {
 		fmt.Fprint(w, `{"url":"u"}`)
 	})
 
-	membership, _, err := client.Organizations.GetOrgMembership("o")
+	membership, _, err := client.Organizations.GetOrgMembership("", "o")
 	if err != nil {
 		t.Errorf("Organizations.GetOrgMembership returned error: %v", err)
 	}
@@ -262,7 +262,27 @@ func TestOrganizationsService_GetOrgMembership(t *testing.T) {
 	}
 }
 
-func TestOrganizationsService_EditOrgMembership(t *testing.T) {
+func TestOrganizationsService_GetOrgMembership_SpecifiedUser(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/orgs/o/memberships/u", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		fmt.Fprint(w, `{"url":"u"}`)
+	})
+
+	membership, _, err := client.Organizations.GetOrgMembership("u", "o")
+	if err != nil {
+		t.Errorf("Organizations.GetOrgMembership returned error: %v", err)
+	}
+
+	want := &Membership{URL: String("u")}
+	if !reflect.DeepEqual(membership, want) {
+		t.Errorf("Organizations.GetOrgMembership returned %+v, want %+v", membership, want)
+	}
+}
+
+func TestOrganizationsService_EditOrgMembership_AuthenticatedUser(t *testing.T) {
 	setup()
 	defer teardown()
 
@@ -280,7 +300,36 @@ func TestOrganizationsService_EditOrgMembership(t *testing.T) {
 		fmt.Fprint(w, `{"url":"u"}`)
 	})
 
-	membership, _, err := client.Organizations.EditOrgMembership("o", input)
+	membership, _, err := client.Organizations.EditOrgMembership("", "o", input)
+	if err != nil {
+		t.Errorf("Organizations.EditOrgMembership returned error: %v", err)
+	}
+
+	want := &Membership{URL: String("u")}
+	if !reflect.DeepEqual(membership, want) {
+		t.Errorf("Organizations.EditOrgMembership returned %+v, want %+v", membership, want)
+	}
+}
+
+func TestOrganizationsService_EditOrgMembership_SpecifiedUser(t *testing.T) {
+	setup()
+	defer teardown()
+
+	input := &Membership{State: String("active")}
+
+	mux.HandleFunc("/orgs/o/memberships/u", func(w http.ResponseWriter, r *http.Request) {
+		v := new(Membership)
+		json.NewDecoder(r.Body).Decode(v)
+
+		testMethod(t, r, "PATCH")
+		if !reflect.DeepEqual(v, input) {
+			t.Errorf("Request body = %+v, want %+v", v, input)
+		}
+
+		fmt.Fprint(w, `{"url":"u"}`)
+	})
+
+	membership, _, err := client.Organizations.EditOrgMembership("u", "o", input)
 	if err != nil {
 		t.Errorf("Organizations.EditOrgMembership returned error: %v", err)
 	}
@@ -290,3 +339,18 @@ func TestOrganizationsService_EditOrgMembership(t *testing.T) {
 		t.Errorf("Organizations.EditOrgMembership returned %+v, want %+v", membership, want)
 	}
 }
+
+func TestOrganizationsService_RemoveOrgMembership(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/orgs/o/memberships/u", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "DELETE")
+		w.WriteHeader(http.StatusNoContent)
+	})
+
+	_, err := client.Organizations.RemoveOrgMembership("u", "o")
+	if err != nil {
+		t.Errorf("Organizations.RemoveOrgMembership returned error: %v", err)
+	}
+}