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diff --git a/source/blender/io/usd/intern/usd_hierarchy_iterator.h b/source/blender/io/usd/intern/usd_hierarchy_iterator.h
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+++ b/source/blender/io/usd/intern/usd_hierarchy_iterator.h
@@ -0,0 +1,71 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2019 Blender Foundation.
+ * All rights reserved.
+ */
+#ifndef __USD_HIERARCHY_ITERATOR_H__
+#define __USD_HIERARCHY_ITERATOR_H__
+
+#include "abstract_hierarchy_iterator.h"
+#include "usd_exporter_context.h"
+#include "usd.h"
+
+#include <string>
+
+#include <pxr/usd/usd/common.h>
+#include <pxr/usd/usd/timeCode.h>
+
+struct Depsgraph;
+struct ID;
+struct Object;
+
+namespace USD {
+
+class USDHierarchyIterator : public AbstractHierarchyIterator {
+ private:
+  const pxr::UsdStageRefPtr stage_;
+  pxr::UsdTimeCode export_time_;
+  const USDExportParams &params_;
+
+ public:
+  USDHierarchyIterator(Depsgraph *depsgraph,
+                       pxr::UsdStageRefPtr stage,
+                       const USDExportParams &params);
+
+  void set_export_frame(float frame_nr);
+  const pxr::UsdTimeCode &get_export_time_code() const;
+
+  virtual std::string make_valid_name(const std::string &name) const override;
+
+ protected:
+  virtual bool mark_as_weak_export(const Object *object) const override;
+
+  virtual AbstractHierarchyWriter *create_transform_writer(
+      const HierarchyContext *context) override;
+  virtual AbstractHierarchyWriter *create_data_writer(const HierarchyContext *context) override;
+  virtual AbstractHierarchyWriter *create_hair_writer(const HierarchyContext *context) override;
+  virtual AbstractHierarchyWriter *create_particle_writer(
+      const HierarchyContext *context) override;
+
+  virtual void delete_object_writer(AbstractHierarchyWriter *writer) override;
+
+ private:
+  USDExporterContext create_usd_export_context(const HierarchyContext *context);
+};
+
+}  // namespace USD
+
+#endif /* __USD_HIERARCHY_ITERATOR_H__ */