diff --git a/ai-compliance-sdk/internal/iace/hazard_category_order.go b/ai-compliance-sdk/internal/iace/hazard_category_order.go
new file mode 100644
index 00000000..d2a39e75
--- /dev/null
+++ b/ai-compliance-sdk/internal/iace/hazard_category_order.go
@@ -0,0 +1,50 @@
+package iace
+
+import "sort"
+
+// EN ISO 12100 hazard-group ordering for the hazard log. Without it the log is
+// returned in pattern-firing order, which reads as a jumble. This groups the
+// hazards top-down by type (A. Mechanisch, B. Elektrisch, C. Thermisch, …),
+// matching the frontend CATEGORY_LABELS.
+var isoCategoryRank = map[string]int{
+	// A. Mechanisch
+	"mechanical_hazard": 10, "mechanical": 10, "maintenance_hazard": 11,
+	// B. Elektrisch
+	"electrical_hazard": 20, "electrical": 20, "emc_hazard": 21,
+	// C. Thermisch
+	"thermal_hazard": 30, "thermal": 30, "high_temperature": 31, "fire_explosion": 32,
+	// D. Pneumatik / Hydraulik
+	"pneumatic_hydraulic": 40,
+	// E. Laerm / Vibration
+	"noise_hazard": 50, "noise_vibration": 50, "vibration_hazard": 51,
+	// F. Ergonomie
+	"ergonomic_hazard": 60, "ergonomic": 60,
+	// G. Stoffe / Umwelt
+	"material_environmental": 70, "chemical_risk": 71, "radiation_hazard": 72,
+	// H. Software / Steuerung (funktionale Sicherheit)
+	"software_control": 80, "software_fault": 80, "safety_function_failure": 81,
+	"configuration_error": 82, "sensor_fault": 83, "hmi_error": 84, "mode_confusion": 85,
+	"communication_failure": 86, "update_failure": 87,
+	// I. Cyber / Netzwerk (zur Ordnungs-Vollstaendigkeit; im CE-Log ausgeschlossen)
+	"unauthorized_access": 90, "firmware_corruption": 91, "cyber_resilience": 92,
+	"cyber_network": 93, "logging_audit_failure": 94, "sensor_spoofing": 95,
+	// J. KI-spezifisch
+	"ai_specific": 100, "ai_misclassification": 100, "false_classification": 100,
+	"model_drift": 100, "data_poisoning": 100, "unintended_bias": 100,
+}
+
+func categoryRank(cat string) int {
+	if r, ok := isoCategoryRank[cat]; ok {
+		return r
+	}
+	return 999 // unknown categories last
+}
+
+// SortHazardsByISO12100 groups hazards by ISO 12100 hazard group. Stable: the
+// relative order within a group (creation/priority order from the engine) is
+// preserved.
+func SortHazardsByISO12100(hazards []Hazard) {
+	sort.SliceStable(hazards, func(i, j int) bool {
+		return categoryRank(hazards[i].Category) < categoryRank(hazards[j].Category)
+	})
+}
diff --git a/ai-compliance-sdk/internal/iace/store_hazards.go b/ai-compliance-sdk/internal/iace/store_hazards.go
index 904e36cd..3bff2ab0 100644
--- a/ai-compliance-sdk/internal/iace/store_hazards.go
+++ b/ai-compliance-sdk/internal/iace/store_hazards.go
@@ -160,6 +160,7 @@ func (s *Store) ListHazards(ctx context.Context, projectID uuid.UUID) ([]Hazard,
 		hazards = append(hazards, h)
 	}
 
+	SortHazardsByISO12100(hazards)
 	return hazards, nil
 }