diff --git a/openpype/hosts/hiero/otio/hiero_export_.py b/openpype/hosts/hiero/otio/hiero_export_.py
new file mode 100644
index 0000000000..b5a96a9414
--- /dev/null
+++ b/openpype/hosts/hiero/otio/hiero_export_.py
@@ -0,0 +1,312 @@
+""" compatibility OpenTimelineIO 0.12.0 and older
+"""
+
+import os
+import re
+import sys
+import opentimelineio as otio
+from . import utils
+import hiero.core
+import hiero.ui
+
+self = sys.modules[__name__]
+self.track_types = {
+    hiero.core.VideoTrack: otio.schema.TrackKind.Video,
+    hiero.core.AudioTrack: otio.schema.TrackKind.Audio
+}
+self.project_fps = None
+self.marker_color_map = {
+    "magenta": otio.schema.MarkerColor.MAGENTA,
+    "red": otio.schema.MarkerColor.RED,
+    "yellow": otio.schema.MarkerColor.YELLOW,
+    "green": otio.schema.MarkerColor.GREEN,
+    "cyan": otio.schema.MarkerColor.CYAN,
+    "blue": otio.schema.MarkerColor.BLUE,
+}
+self.timeline = None
+self.include_tags = None
+
+
+def create_otio_rational_time(frame, fps):
+    return otio.opentime.RationalTime(
+        float(frame),
+        float(fps)
+    )
+
+
+def create_otio_time_range(start_frame, frame_duration, fps):
+    return otio.opentime.TimeRange(
+        start_time=create_otio_rational_time(start_frame, fps),
+        duration=create_otio_rational_time(frame_duration, fps)
+    )
+
+
+def _get_metadata(item):
+    if hasattr(item, 'metadata'):
+        return {key: value for key, value in item.metadata().items()}
+    return {}
+
+
+def create_otio_reference(clip):
+    metadata = _get_metadata(clip)
+    media_source = clip.mediaSource()
+
+    # get file info for path and start frame
+    file_info = media_source.fileinfos().pop()
+    frame_start = file_info.startFrame()
+    path = file_info.filename()
+
+    # get padding and other file infos
+    padding = media_source.filenamePadding()
+    file_head = media_source.filenameHead()
+    is_sequence = not media_source.singleFile()
+    frame_duration = media_source.duration()
+    fps = utils.get_rate(clip)
+    extension = os.path.splitext(path)[-1]
+
+    if is_sequence:
+        metadata.update({
+            "isSequence": True,
+            "padding": padding
+        })
+
+    otio_ex_ref_item = None
+
+    if is_sequence:
+        # if it is file sequence try to create `ImageSequenceReference`
+        # the OTIO might not be compatible so return nothing and do it old way
+        try:
+            dirname = os.path.dirname(path)
+            otio_ex_ref_item = otio.schema.ImageSequenceReference(
+                target_url_base=dirname + os.sep,
+                name_prefix=file_head,
+                name_suffix=extension,
+                start_frame=frame_start,
+                frame_zero_padding=padding,
+                rate=fps,
+                available_range=create_otio_time_range(
+                    frame_start,
+                    frame_duration,
+                    fps
+                )
+            )
+        except AttributeError:
+            pass
+
+    if not otio_ex_ref_item:
+        reformat_path = utils.get_reformated_path(path, padded=False)
+        # in case old OTIO or video file create `ExternalReference`
+        otio_ex_ref_item = otio.schema.ExternalReference(
+            target_url=reformat_path,
+            available_range=create_otio_time_range(
+                frame_start,
+                frame_duration,
+                fps
+            )
+        )
+
+    # add metadata to otio item
+    add_otio_metadata(otio_ex_ref_item, media_source, **metadata)
+
+    return otio_ex_ref_item
+
+
+def get_marker_color(tag):
+    icon = tag.icon()
+    pat = r'icons:Tag(?P<color>\w+)\.\w+'
+
+    res = re.search(pat, icon)
+    if res:
+        color = res.groupdict().get('color')
+        if color.lower() in self.marker_color_map:
+            return self.marker_color_map[color.lower()]
+
+    return otio.schema.MarkerColor.RED
+
+
+def create_otio_markers(otio_item, track_item):
+    for tag in track_item.tags():
+        if not tag.visible():
+            continue
+
+        if tag.name() == 'Copy':
+            # Hiero adds this tag to a lot of clips
+            continue
+
+        frame_rate = utils.get_rate(track_item)
+
+        marked_range = otio.opentime.TimeRange(
+            start_time=otio.opentime.RationalTime(
+                tag.inTime(),
+                frame_rate
+            ),
+            duration=otio.opentime.RationalTime(
+                int(tag.metadata().dict().get('tag.length', '0')),
+                frame_rate
+            )
+        )
+
+        metadata = dict(
+            Hiero=tag.metadata().dict()
+        )
+        # Store the source item for future import assignment
+        metadata['Hiero']['source_type'] = track_item.__class__.__name__
+
+        marker = otio.schema.Marker(
+            name=tag.name(),
+            color=get_marker_color(tag),
+            marked_range=marked_range,
+            metadata=metadata
+        )
+
+        otio_item.markers.append(marker)
+
+
+def create_otio_clip(track_item):
+    clip = track_item.source()
+    source_in = track_item.sourceIn()
+    duration = track_item.sourceDuration()
+    fps = utils.get_rate(track_item)
+    name = track_item.name()
+
+    media_reference = create_otio_reference(clip)
+    source_range = create_otio_time_range(
+        int(source_in),
+        int(duration),
+        fps
+    )
+
+    otio_clip = otio.schema.Clip(
+        name=name,
+        source_range=source_range,
+        media_reference=media_reference
+    )
+    create_otio_markers(otio_clip, track_item)
+
+    return otio_clip
+
+
+def create_otio_gap(gap_start, clip_start, tl_start_frame, fps):
+    return otio.schema.Gap(
+        source_range=create_otio_time_range(
+            gap_start,
+            (clip_start - tl_start_frame) - gap_start,
+            fps
+        )
+    )
+
+
+def _create_otio_timeline():
+    metadata = _get_metadata(self.timeline)
+    start_time = create_otio_rational_time(
+        self.timeline.timecodeStart(), self.project_fps)
+
+    return otio.schema.Timeline(
+        name=self.timeline.name(),
+        global_start_time=start_time,
+        metadata=metadata
+    )
+
+
+def _get_metadata_media_pool_item(media_pool_item):
+    data = dict()
+    data.update({k: v for k, v in media_pool_item.GetMetadata().items()})
+    property = media_pool_item.GetClipProperty() or {}
+    for name, value in property.items():
+        if "Resolution" in name and "" != value:
+            width, height = value.split("x")
+            data.update({
+                "width": int(width),
+                "height": int(height)
+            })
+        if "PAR" in name and "" != value:
+            try:
+                data.update({"pixelAspect": float(value)})
+            except ValueError:
+                if "Square" in value:
+                    data.update({"pixelAspect": float(1)})
+                else:
+                    data.update({"pixelAspect": float(1)})
+
+    return data
+
+
+def create_otio_track(track_type, track_name):
+    return otio.schema.Track(
+        name=track_name,
+        kind=self.track_types[track_type]
+    )
+
+
+def add_otio_gap(clip_start, otio_track, item_start_frame):
+    # if gap between track start and clip start
+    if clip_start > otio_track.available_range().duration.value:
+        # create gap and add it to track
+        otio_track.append(
+            create_otio_gap(
+                otio_track.available_range().duration.value,
+                item_start_frame,
+                self.timeline.timecodeStart(),
+                self.project_fps
+            )
+        )
+
+
+def add_otio_metadata(otio_item, media_source, **kwargs):
+    metadata = _get_metadata(media_source)
+
+    # add additional metadata from kwargs
+    if kwargs:
+        metadata.update(kwargs)
+
+    # add metadata to otio item metadata
+    for key, value in metadata.items():
+        otio_item.metadata.update({key: value})
+
+
+def create_otio_timeline():
+
+    # get current timeline
+    self.timeline = hiero.ui.activeSequence()
+    self.project_fps = self.timeline.framerate().toFloat()
+
+    # convert timeline to otio
+    otio_timeline = _create_otio_timeline()
+
+    # loop all defined track types
+    for track in self.hiero_sequence.items():
+        # skip if track is disabled
+        if not track.isEnabled():
+            continue
+
+        # convert track to otio
+        otio_track = create_otio_track(
+            type(track), track.name())
+
+        for itemindex, track_item in enumerate(track):
+            # skip offline track items
+            if not track_item.isMediaPresent():
+                continue
+
+            # skip if track item is disabled
+            if not track_item.isEnabled():
+                continue
+
+            # calculate real clip start
+            clip_start = track_item.timelineIn()
+
+            add_otio_gap(
+                clip_start, otio_track, clip_start)
+
+            # create otio clip and add it to track
+            otio_clip = create_otio_clip(track_item)
+            otio_track.append(otio_clip)
+
+        # add track to otio timeline
+        otio_timeline.tracks.append(otio_track)
+
+    return otio_timeline
+
+
+def write_to_file(otio_timeline, path):
+    otio.adapters.write_to_file(otio_timeline, path)
diff --git a/openpype/hosts/hiero/otio/utils.py b/openpype/hosts/hiero/otio/utils.py
new file mode 100644
index 0000000000..12f963fe97
--- /dev/null
+++ b/openpype/hosts/hiero/otio/utils.py
@@ -0,0 +1,83 @@
+import re
+import opentimelineio as otio
+
+
+def timecode_to_frames(timecode, framerate):
+    rt = otio.opentime.from_timecode(timecode, 24)
+    return int(otio.opentime.to_frames(rt))
+
+
+def frames_to_timecode(frames, framerate):
+    rt = otio.opentime.from_frames(frames, framerate)
+    return otio.opentime.to_timecode(rt)
+
+
+def frames_to_secons(frames, framerate):
+    rt = otio.opentime.from_frames(frames, framerate)
+    return otio.opentime.to_seconds(rt)
+
+
+def get_reformated_path(path, padded=True, first=False):
+    """
+    Return fixed python expression path
+
+    Args:
+        path (str): path url or simple file name
+
+    Returns:
+        type: string with reformated path
+
+    Example:
+        get_reformated_path("plate.[0001-1008].exr") > plate.%04d.exr
+
+    """
+    num_pattern = r"(\[\d+\-\d+\])"
+    padding_pattern = r"(\d+)(?=-)"
+    first_frame_pattern = re.compile(r"\[(\d+)\-\d+\]")
+
+    if "[" in path:
+        padding = len(re.findall(padding_pattern, path).pop())
+        if padded:
+            path = re.sub(num_pattern, f"%0{padding}d", path)
+        elif first:
+            first_frame = re.findall(first_frame_pattern, path, flags=0)
+            if len(first_frame) >= 1:
+                first_frame = first_frame[0]
+            path = re.sub(num_pattern, first_frame, path)
+        else:
+            path = re.sub(num_pattern, "%d", path)
+    return path
+
+
+def get_padding_from_path(path):
+    """
+    Return padding number from DaVinci Resolve sequence path style
+
+    Args:
+        path (str): path url or simple file name
+
+    Returns:
+        int: padding number
+
+    Example:
+        get_padding_from_path("plate.[0001-1008].exr") > 4
+
+    """
+    padding_pattern = "(\\d+)(?=-)"
+    if "[" in path:
+        return len(re.findall(padding_pattern, path).pop())
+
+    return None
+
+
+def get_rate(item):
+    if not hasattr(item, 'framerate'):
+        item = item.sequence()
+
+    num, den = item.framerate().toRational()
+    rate = float(num) / float(den)
+
+    if rate.is_integer():
+        return rate
+
+    return round(rate, 4)