diff --git a/internal/sync/roles.go b/internal/sync/roles.go
index 36957db..d54e628 100644
--- a/internal/sync/roles.go
+++ b/internal/sync/roles.go
@@ -73,6 +73,7 @@ func isLagoonGroup(
 // ID of the group's project.
 func projectGroupRoleName(
 	group keycloak.Group,
+	projectNames map[int]string,
 	groupProjectsMap map[string][]int,
 ) (string, error) {
 	projectIDs, ok := groupProjectsMap[group.ID]
@@ -80,24 +81,32 @@ func projectGroupRoleName(
 		return "", fmt.Errorf("missing project group ID %s in groupProjectsMap",
 			group.ID)
 	}
-	if len(projectIDs) != 1 {
-		return "", fmt.Errorf("too many projects in group ID %s: %d", group.ID,
-			len(projectIDs))
+	if len(projectIDs) == 0 {
+		return "", fmt.Errorf("missing project IDs in project group ID %s", group.ID)
 	}
-	if projectIDs[0] < 0 {
-		return "", fmt.Errorf("invalid project ID in group ID %s: %d", group.ID,
-			projectIDs[0])
+	for _, pid := range projectIDs {
+		if pid < 0 {
+			return "", fmt.Errorf("invalid project ID in group ID %s: %d", group.ID, pid)
+		}
+		if strings.TrimPrefix(group.Name, "project-") == projectNames[pid] {
+			return fmt.Sprintf("p%d", pid), nil
+		}
 	}
-	return fmt.Sprintf("p%d", projectIDs[0]), nil
+	return "", fmt.Errorf(
+		"couldn't match project group ID %s to any member project IDs: %v",
+		group.ID,
+		projectIDs,
+	)
 }
 
 // generateProjectGroupRole constructs an opensearch.Role from the given
 // keycloak group corresponding to a Lagoon project group.
 func generateProjectGroupRole(
 	group keycloak.Group,
+	projectNames map[int]string,
 	groupProjectsMap map[string][]int,
 ) (string, *opensearch.Role, error) {
-	name, err := projectGroupRoleName(group, groupProjectsMap)
+	name, err := projectGroupRoleName(group, projectNames, groupProjectsMap)
 	if err != nil {
 		return "", nil,
 			fmt.Errorf("couldn't generate project group role name: %v", err)
@@ -200,7 +209,8 @@ func generateRoles(
 	var err error
 	for _, group := range groups {
 		if isProjectGroup(log, group) {
-			name, role, err = generateProjectGroupRole(group, groupProjectsMap)
+			name, role, err =
+				generateProjectGroupRole(group, projectNames, groupProjectsMap)
 			if err != nil {
 				log.Warn("couldn't generate role for project group",
 					zap.String("group name", group.Name), zap.Error(err))
diff --git a/internal/sync/rolesmapping.go b/internal/sync/rolesmapping.go
index cebcf6f..97b7847 100644
--- a/internal/sync/rolesmapping.go
+++ b/internal/sync/rolesmapping.go
@@ -62,13 +62,14 @@ func calculateRoleMappingDiff(
 func generateRolesMapping(
 	log *zap.Logger,
 	groups []keycloak.Group,
+	projectNames map[int]string,
 	groupProjectsMap map[string][]int,
 ) map[string]opensearch.RoleMapping {
 	rolesmapping := map[string]opensearch.RoleMapping{}
 	for _, group := range groups {
 		// figure out if this is a regular group or project group
 		if isProjectGroup(log, group) {
-			name, err := projectGroupRoleName(group, groupProjectsMap)
+			name, err := projectGroupRoleName(group, projectNames, groupProjectsMap)
 			if err != nil {
 				log.Warn("couldn't generate project group role name", zap.Error(err),
 					zap.String("group name", group.Name))
@@ -123,6 +124,7 @@ func syncRolesMapping(
 	ctx context.Context,
 	log *zap.Logger,
 	groups []keycloak.Group,
+	projectNames map[int]string,
 	roles map[string]opensearch.Role,
 	groupProjectsMap map[string][]int,
 	o OpensearchService,
@@ -137,7 +139,7 @@ func syncRolesMapping(
 	// ignore non-lagoon rolesmapping
 	existing = filterRolesMapping(existing, roles)
 	// generate the rolesmapping required by Lagoon
-	required := generateRolesMapping(log, groups, groupProjectsMap)
+	required := generateRolesMapping(log, groups, projectNames, groupProjectsMap)
 	// calculate rolesmapping to add/remove
 	toCreate, toDelete := calculateRoleMappingDiff(existing, required)
 	for _, name := range toDelete {
diff --git a/internal/sync/sync.go b/internal/sync/sync.go
index 667ef92..a2469f3 100644
--- a/internal/sync/sync.go
+++ b/internal/sync/sync.go
@@ -112,7 +112,7 @@ func Sync(ctx context.Context, log *zap.Logger, l LagoonDBService,
 		case "roles":
 			syncRoles(ctx, log, groups, projectNames, roles, groupProjectsMap, o, dryRun)
 		case "rolesmapping":
-			syncRolesMapping(ctx, log, groups, roles, groupProjectsMap, o, dryRun)
+			syncRolesMapping(ctx, log, groups, projectNames, roles, groupProjectsMap, o, dryRun)
 		case "indexpatterns":
 			syncIndexPatterns(ctx, log, groupsSansGlobal, projectNames, groupProjectsMap,
 				o, d, dryRun, legacyIndexPatternDelimiter)