diff --git a/types/oscal/catalog/catalog.go b/types/oscal/catalog/catalog.go
new file mode 100644
index 0000000..39a0f82
--- /dev/null
+++ b/types/oscal/catalog/catalog.go
@@ -0,0 +1,16 @@
+package catalog
+
+func (c *Catalog) FindControlById(id string) *Control {
+	for i, ctrl := range c.Controls {
+		if ctrl.Id == id {
+			return &c.Controls[i]
+		}
+	}
+	for i, _ := range c.Groups {
+		ctrl := c.Groups[i].FindControlById(id)
+		if ctrl != nil {
+			return ctrl
+		}
+	}
+	return nil
+}
diff --git a/types/oscal/catalog/group.go b/types/oscal/catalog/group.go
new file mode 100644
index 0000000..3f90903
--- /dev/null
+++ b/types/oscal/catalog/group.go
@@ -0,0 +1,16 @@
+package catalog
+
+func (g *Group) FindControlById(id string) *Control {
+	for i, ctrl := range g.Controls {
+		if ctrl.Id == id {
+			return &g.Controls[i]
+		}
+	}
+	for i, _ := range g.Groups {
+		ctrl := g.Groups[i].FindControlById(id)
+		if ctrl != nil {
+			return ctrl
+		}
+	}
+	return nil
+}