diff --git a/pkg/pantheon/org.go b/pkg/pantheon/org.go
new file mode 100644
index 0000000..214c695
--- /dev/null
+++ b/pkg/pantheon/org.go
@@ -0,0 +1,127 @@
+package pantheon
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+)
+
+// Org is a representation of a Pantheon organization.
+type Org struct {
+	Archived     bool   `json:"archived"`
+	ID           string `json:"id"`
+	Key          string `json:"key"`
+	Role         string `json:"role"`
+	Organization struct {
+		Profile struct {
+			MachineName      string `json:"machine_name"`
+			ChangeServiceURL string `json:"change_service_url"`
+			Name             string `json:"name"`
+			EmailDomain      string `json:"email_domain"`
+			OrgLogoWidth     uint32 `json:"org_logo_width"`
+			OrgLogoHeight    uint32 `json:"org_logo_height"`
+			BaseDomain       string `json:"base_domain"`
+			BillingURL       string `json:"billing_url"`
+			TermsOfService   string `json:"terms_of_service"`
+			OrgLogo          string `json:"org_logo"`
+		} `json:"profile"`
+		ID string `json:"id"`
+	} `json:"organization"`
+	SiteID string `json:"site_id"`
+	UserID string `json:"user_id"`
+}
+
+// OrgList represents a grouping of Pantheon organizations.
+type OrgList struct {
+	Orgs []Org
+}
+
+// NewOrgList creates an OrgList. The user will be specified by which session you use to make the GET request. You are responsible for making the HTTP request.
+func NewOrgList() *OrgList {
+	return &OrgList{}
+}
+
+// Path returns the API endpoint which can be used to get a OrgList for the current user.
+func (ol OrgList) Path(method string, auth AuthSession) string {
+	userid, err := auth.GetUser()
+	if err != nil {
+		log.Fatalf("Could not determine user for request: %v", err)
+	}
+
+	return fmt.Sprintf("/users/%s/memberships/organizations", userid)
+}
+
+// JSON prepares the OrgList for HTTP transport.
+func (ol OrgList) JSON() ([]byte, error) {
+	return json.Marshal(ol.Orgs)
+}
+
+// Unmarshal is responsible for converting a HTTP response into a OrgList struct.
+func (ol *OrgList) Unmarshal(data []byte) error {
+	return json.Unmarshal(data, &ol.Orgs)
+}
+
+// OrgSite is a representation of a deployed pantheon site for an organization.
+type OrgSite struct {
+	Archived bool   `json:"archived"`
+	ID       string `json:"id"`
+	Key      string `json:"key"`
+	Role     string `json:"role"`
+	Site     struct {
+		Created         jsonInt64 `json:"created"`
+		CreatedByUserID string    `json:"created_by_user_id"`
+		Framework       string    `json:"framework"`
+		Frozen          bool      `json:"frozen"`
+		ID              string    `json:"id"`
+		LastCodePush    struct {
+			Timestamp string      `json:"timestamp"`
+			UserUUID  interface{} `json:"user_uuid"`
+		} `json:"last_code_push"`
+		Name          string    `json:"name"`
+		Owner         string    `json:"owner"`
+		PhpVersion    jsonInt64 `json:"php_version"`
+		PreferredZone string    `json:"preferred_zone"`
+		Product       struct {
+			ID       string `json:"id"`
+			Longname string `json:"longname"`
+		} `json:"product"`
+		ProductID    string `json:"product_id"`
+		ServiceLevel string `json:"service_level"`
+		Upstream     struct {
+			Branch    string `json:"branch"`
+			ProductID string `json:"product_id"`
+			URL       string `json:"url"`
+		} `json:"upstream"`
+	} `json:"site"`
+	Organization string `json:"organization_id"`
+	SiteID       string `json:"site_id"`
+}
+
+// OrgSiteList represents a grouping of deployed Pantheon sites for an organization.
+type OrgSiteList struct {
+	Organization string
+	OrgSites     []OrgSite
+}
+
+// NewOrgSiteList creates an OrgSiteList. The user will be specified by which session you use to make the GET request. You are responsible for making the HTTP request.
+func NewOrgSiteList(org string) *OrgSiteList {
+	return &OrgSiteList{
+		Organization: org,
+		OrgSites:     make([]OrgSite, 0),
+	}
+}
+
+// Path returns the API endpoint which can be used to get a OrgSiteList for the current user.
+func (osl OrgSiteList) Path(method string, auth AuthSession) string {
+	return fmt.Sprintf("/organizations/%s/memberships/sites", osl.Organization)
+}
+
+// JSON prepares the OrgSiteList for HTTP transport.
+func (osl OrgSiteList) JSON() ([]byte, error) {
+	return json.Marshal(osl.OrgSites)
+}
+
+// Unmarshal is responsible for converting a HTTP response into a OrgSiteList struct.
+func (osl *OrgSiteList) Unmarshal(data []byte) error {
+	return json.Unmarshal(data, &osl.OrgSites)
+}
diff --git a/pkg/pantheon/site.go b/pkg/pantheon/site.go
index 4b30c9c..da782b2 100644
--- a/pkg/pantheon/site.go
+++ b/pkg/pantheon/site.go
@@ -10,11 +10,9 @@ import (
 type Site struct {
 	Archived bool   `json:"archived"`
 	ID       string `json:"id"`
-	// invited_by_id seems to fail for some sites and we don't use it, so ignoring it here.
-	//InvitedByID string `json:"invited_by_id"`
-	Key  string `json:"key"`
-	Role string `json:"role"`
-	Site struct {
+	Key      string `json:"key"`
+	Role     string `json:"role"`
+	Site     struct {
 		Created         jsonInt64 `json:"created"`
 		CreatedByUserID string    `json:"created_by_user_id"`
 		Framework       string    `json:"framework"`
@@ -73,3 +71,49 @@ func (sl SiteList) JSON() ([]byte, error) {
 func (sl *SiteList) Unmarshal(data []byte) error {
 	return json.Unmarshal(data, &sl.Sites)
 }
+
+// Domain is a representation of a domain for a deployed Pantheon site.
+type Domain struct {
+	DNSZoneName      string `json:"dns_zone_name"`
+	DomainLookupRAX  uint64 `json:"domain_lookup_rax"`
+	DomainLookupUSCL uint64 `json:"domain_lookup_usc1"`
+	Environment      string `json:"environment"`
+	SiteID           string `json:"site_id"`
+	Type             string `json:"type"`
+	ID               string `json:"id"`
+	Key              string `json:"key"`
+	Status           string `json:"status"`
+	StatusMessage    string `json:"status_message"`
+	Deleteable       bool   `json:"deletable"`
+}
+
+// SiteDomainList represents a grouping of domains for a deployed Pantheon site.
+type SiteDomainList struct {
+	SiteID      string
+	Environment string
+	Domains     []Domain
+}
+
+// NewSiteList creates an SiteDomainList. The user will be specified by which session you use to make the GET request. You are responsible for making the HTTP request.
+func NewSiteDomainList(siteID string, env string) *SiteDomainList {
+	return &SiteDomainList{
+		SiteID:      siteID,
+		Environment: env,
+		Domains:     make([]Domain, 0),
+	}
+}
+
+// Path returns the API endpoint which can be used to get a SiteDomainList for the current user.
+func (sdl SiteDomainList) Path(method string, auth AuthSession) string {
+	return fmt.Sprintf("/sites/%s/environments/%s/domains", sdl.SiteID, sdl.Environment)
+}
+
+// JSON prepares the SiteList for HTTP transport.
+func (sdl SiteDomainList) JSON() ([]byte, error) {
+	return json.Marshal(sdl.Domains)
+}
+
+// Unmarshal is responsible for converting a HTTP response into a SiteDomainList struct.
+func (sdl *SiteDomainList) Unmarshal(data []byte) error {
+	return json.Unmarshal(data, &sdl.Domains)
+}