diff --git a/README.md b/README.md
index 5a177c0..fd475e2 100644
--- a/README.md
+++ b/README.md
@@ -70,18 +70,15 @@ savedUser, err := ic.Users.Save(&user)
 Adding a Company:
 
 ```go
-companyList := intercom.CompanyList{
-	Companies: []intercom.Company{
-		{CompanyID: "5"},
-	},
-}
-user := intercom.User{
-	UserID: "27",
-	Companies: &companyList,
+company := intercom.Company{
+		{CompanyID: "5"}
+contact := intercom.Contact{
+		{ContactID: "6"}
 }
+savedContact, err := ic.Contacts.AttachContact(&contact, &company)
 ```
 
-Removing is similar, but adding a `Remove: intercom.Bool(true)` attribute to a company.
+Removing is similar, but use the `ic.Contacts.DetachContact(&contact, &company)` method instead.
 
 #### Find
 
diff --git a/company_api.go b/company_api.go
index 2e43b14..6a8a4a5 100644
--- a/company_api.go
+++ b/company_api.go
@@ -119,3 +119,12 @@ func (api CompanyAPI) getPlanName(company *Company) string {
 	}
 	return company.Plan.Name
 }
+
+func unmarshalToCompany(data []byte, err error) (Company, error) {
+	savedCompany := Company{}
+	if err != nil {
+		return savedCompany, err
+	}
+	err = json.Unmarshal(data, &savedCompany)
+	return savedCompany, err
+}
diff --git a/contact.go b/contact.go
index 2bff906..39fe4d8 100644
--- a/contact.go
+++ b/contact.go
@@ -9,8 +9,8 @@ type ContactService struct {
 
 // ContactList holds a list of Contacts and paging information
 type ContactList struct {
-	Pages    PageParams
-	Contacts []Contact
+	Pages       PageParams
+	Contacts    []Contact
 	ScrollParam string `json:"scroll_param,omitempty"`
 }
 
@@ -69,7 +69,7 @@ func (c *ContactService) List(params PageParams) (ContactList, error) {
 
 // List all Contacts for App via Scroll API
 func (c *ContactService) Scroll(scrollParam string) (ContactList, error) {
-       return c.Repository.scroll(scrollParam)
+	return c.Repository.scroll(scrollParam)
 }
 
 // ListByEmail looks up a list of Contacts by their Email.
@@ -97,6 +97,16 @@ func (c *ContactService) Update(contact *Contact) (Contact, error) {
 	return c.Repository.update(contact)
 }
 
+// AttachContact to Company
+func (c *ContactService) AttachContact(contact *Contact, company *Company) (Company, error) {
+	return c.Repository.attachContact(contact, company)
+}
+
+// DetachContact from Company
+func (c *ContactService) DetachContact(contact *Contact, company *Company) (Company, error) {
+	return c.Repository.detachContact(contact, company)
+}
+
 // Convert Contact to User
 func (c *ContactService) Convert(contact *Contact, user *User) (User, error) {
 	return c.Repository.convert(contact, user)
diff --git a/contact_api.go b/contact_api.go
index f42384a..1d68694 100644
--- a/contact_api.go
+++ b/contact_api.go
@@ -17,6 +17,12 @@ type ContactRepository interface {
 	update(*Contact) (Contact, error)
 	convert(*Contact, *User) (User, error)
 	delete(id string) (Contact, error)
+	attachContact(*Contact, *Company) (Company, error)
+	detachContact(*Contact, *Company) (Company, error)
+}
+
+type requestContactAttachemntBody struct {
+	ID string `json:"id,omitempty"`
 }
 
 // ContactAPI implements ContactRepository
@@ -49,14 +55,14 @@ func (api ContactAPI) list(params contactListParams) (ContactList, error) {
 }
 
 func (api ContactAPI) scroll(scrollParam string) (ContactList, error) {
-       contactList := ContactList{}
-       params := scrollParams{ ScrollParam: scrollParam }
-       data, err := api.httpClient.Get("/contacts/scroll", params)
-       if err != nil {
-               return contactList, err
-       }
-       err = json.Unmarshal(data, &contactList)
-       return contactList, err
+	contactList := ContactList{}
+	params := scrollParams{ScrollParam: scrollParam}
+	data, err := api.httpClient.Get("/contacts/scroll", params)
+	if err != nil {
+		return contactList, err
+	}
+	err = json.Unmarshal(data, &contactList)
+	return contactList, err
 }
 
 func (api ContactAPI) create(contact *Contact) (Contact, error) {
@@ -64,6 +70,15 @@ func (api ContactAPI) create(contact *Contact) (Contact, error) {
 	return unmarshalToContact(api.httpClient.Post("/contacts", &requestContact))
 }
 
+func (api ContactAPI) attachContact(contact *Contact, company *Company) (Company, error) {
+	requestContact := api.buildRequestContactAttachment(company)
+	return unmarshalToCompany(api.httpClient.Post(fmt.Sprintf("/contacts/%s/companies", contact.ID), &requestContact))
+}
+
+func (api ContactAPI) detachContact(contact *Contact, company *Company) (Company, error) {
+	return unmarshalToCompany(api.httpClient.Post(fmt.Sprintf("/contacts/%s/companies/%s", contact.ID, company.ID), nil))
+}
+
 func (api ContactAPI) update(contact *Contact) (Contact, error) {
 	requestContact := api.buildRequestContact(contact)
 	return unmarshalToContact(api.httpClient.Post("/contacts", &requestContact))
@@ -120,6 +135,12 @@ func (api ContactAPI) buildRequestContact(contact *Contact) requestUser {
 	}
 }
 
+func (api ContactAPI) buildRequestContactAttachment(company *Company) requestContactAttachemntBody {
+	return requestContactAttachemntBody{
+		ID: company.ID,
+	}
+}
+
 func (api ContactAPI) getCompaniesToSendFromContact(contact *Contact) []UserCompany {
 	if contact.Companies == nil {
 		return []UserCompany{}
diff --git a/contact_api_test.go b/contact_api_test.go
index 1fe5f50..d57d63e 100644
--- a/contact_api_test.go
+++ b/contact_api_test.go
@@ -85,3 +85,25 @@ func TestContactAPIDelete(t *testing.T) {
 		t.Errorf("Expected UserID %s, got %s", "123", returned.UserID)
 	}
 }
+
+func TestContactAPIAttach(t *testing.T) {
+	http := TestUserHTTPClient{fixtureFilename: "fixtures/contact_attachment.json", expectedURI: "/contacts/b123d/companies", t: t}
+	api := ContactAPI{httpClient: &http}
+	contact := &Contact{ID: "b123d"}
+	company := &Company{ID: "46adad3f09126dca", Name: "My Co", CompanyID: "aa123"}
+	returned, _ := api.attachContact(contact, company)
+	if returned.ID != "46adad3f09126dca" {
+		t.Errorf("Expected ID %s, got %s", "46adad3f09126dca", returned.ID)
+	}
+}
+
+func TestContactAPIDetach(t *testing.T) {
+	http := TestUserHTTPClient{fixtureFilename: "fixtures/contact_attachment.json", expectedURI: "/contacts/b123d/companies/46adad3f09126dca", t: t}
+	api := ContactAPI{httpClient: &http}
+	contact := &Contact{ID: "b123d"}
+	company := &Company{ID: "46adad3f09126dca", Name: "My Co", CompanyID: "aa123"}
+	returned, _ := api.detachContact(contact, company)
+	if returned.ID != "46adad3f09126dca" {
+		t.Errorf("Expected ID %s, got %s, %s", "46adad3f09126dca", returned.ID, company)
+	}
+}
diff --git a/contact_test.go b/contact_test.go
index 88f593b..2b2a525 100644
--- a/contact_test.go
+++ b/contact_test.go
@@ -121,3 +121,11 @@ func (t TestContactAPI) convert(c *Contact, u *User) (User, error) {
 func (t TestContactAPI) delete(id string) (Contact, error) {
 	return Contact{ID: id}, nil
 }
+
+func (t TestContactAPI) attachContact(c *Contact, co *Company) (Company, error) {
+	return Company{ID: co.ID}, nil
+}
+
+func (t TestContactAPI) detachContact(c *Contact, co *Company) (Company, error) {
+	return Company{ID: co.ID}, nil
+}
diff --git a/fixtures/contact_attachment.json b/fixtures/contact_attachment.json
new file mode 100644
index 0000000..3700795
--- /dev/null
+++ b/fixtures/contact_attachment.json
@@ -0,0 +1,3 @@
+{
+    "id": "46adad3f09126dca"
+}
\ No newline at end of file