diff --git a/src/blenderbim/blenderbim/bim/module/material/__init__.py b/src/blenderbim/blenderbim/bim/module/material/__init__.py
index 7680e62122..83ef17c184 100644
--- a/src/blenderbim/blenderbim/bim/module/material/__init__.py
+++ b/src/blenderbim/blenderbim/bim/module/material/__init__.py
@@ -10,6 +10,7 @@ classes = (
     operator.RemoveConstituent,
     operator.AddProfile,
     operator.RemoveProfile,
+    operator.AssignParameterizedProfile,
     operator.AddLayer,
     operator.RemoveLayer,
     operator.ReorderMaterialSetItem,
diff --git a/src/blenderbim/blenderbim/bim/module/material/operator.py b/src/blenderbim/blenderbim/bim/module/material/operator.py
index c77e96048b..b5ff702d02 100644
--- a/src/blenderbim/blenderbim/bim/module/material/operator.py
+++ b/src/blenderbim/blenderbim/bim/module/material/operator.py
@@ -1,8 +1,36 @@
 import bpy
+import json
 import ifcopenshell.api
 import ifcopenshell.util.attribute
 from blenderbim.bim.ifc import IfcStore
 from ifcopenshell.api.material.data import Data
+from ifcopenshell.api.profile.data import Data as ProfileData
+
+
+class AssignParameterizedProfile(bpy.types.Operator):
+    bl_idname = "bim.assign_parameterized_profile"
+    bl_label = "Assign Parameterized Profile"
+    ifc_class: bpy.props.StringProperty()
+    material_profile: bpy.props.IntProperty()
+    obj: bpy.props.StringProperty()
+
+    def execute(self, context):
+        obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
+        self.file = IfcStore.get_file()
+        profile = ifcopenshell.api.run(
+            "profile.add_parameterized_profile",
+            self.file,
+            **{"ifc_class": self.ifc_class},
+        )
+        ifcopenshell.api.run(
+            "material.assign_profile",
+            self.file,
+            **{"material_profile": self.file.by_id(self.material_profile), "profile": profile}
+        )
+        Data.load_profiles()
+        ProfileData.load(self.file)
+        bpy.ops.bim.enable_editing_material_set_item(obj=obj.name, material_set_item=self.material_profile)
+        return {"FINISHED"}
 
 
 class AddMaterial(bpy.types.Operator):
@@ -370,8 +398,8 @@ class EnableEditingMaterialSetItem(bpy.types.Operator):
     def execute(self, context):
         self.file = IfcStore.get_file()
         obj = bpy.data.objects.get(self.obj) if self.obj else bpy.context.active_object
-        props = obj.BIMObjectMaterialProperties
-        props.active_material_set_item_id = self.material_set_item
+        self.props = obj.BIMObjectMaterialProperties
+        self.props.active_material_set_item_id = self.material_set_item
         product_data = Data.products[obj.BIMObjectProperties.ifc_definition_id]
         material_set_item = self.file.by_id(self.material_set_item)
 
@@ -384,17 +412,24 @@ class EnableEditingMaterialSetItem(bpy.types.Operator):
         else:
             material_set_item_data = {}
 
-        props.material_set_item_material = str(material_set_item_data["Material"])
+        self.props.material_set_item_material = str(material_set_item_data["Material"])
 
-        while len(props.material_set_item_attributes) > 0:
-            props.material_set_item_attributes.remove(0)
+        self.load_set_item_attributes(material_set_item, material_set_item_data)
+        if material_set_item.is_a("IfcMaterialProfile"):
+            self.load_profile_attributes(material_set_item, material_set_item_data)
+
+        return {"FINISHED"}
+
+    def load_set_item_attributes(self, material_set_item, material_set_item_data):
+        while len(self.props.material_set_item_attributes) > 0:
+            self.props.material_set_item_attributes.remove(0)
 
         for attribute in IfcStore.get_schema().declaration_by_name(material_set_item.is_a()).all_attributes():
             data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
             if data_type == "entity":
                 continue
             if attribute.name() in material_set_item_data:
-                new = props.material_set_item_attributes.add()
+                new = self.props.material_set_item_attributes.add()
                 new.name = attribute.name()
                 new.is_null = material_set_item_data[attribute.name()] is None
                 new.data_type = data_type
@@ -406,7 +441,45 @@ class EnableEditingMaterialSetItem(bpy.types.Operator):
                     new.int_value = 0 if new.is_null else material_set_item_data[attribute.name()]
                 elif data_type == "boolean":
                     new.bool_value = False if new.is_null else material_set_item_data[attribute.name()]
-        return {"FINISHED"}
+
+    def load_profile_attributes(self, material_set_item, material_set_item_data):
+        while len(self.props.material_set_item_profile_attributes) > 0:
+            self.props.material_set_item_profile_attributes.remove(0)
+
+        if not material_set_item_data["Profile"]:
+            return
+
+        profile = self.file.by_id(material_set_item_data["Profile"])
+        profile_data = ProfileData.profiles[material_set_item_data["Profile"]]
+
+        for attribute in IfcStore.get_schema().declaration_by_name(profile.is_a()).all_attributes():
+            data_type = ifcopenshell.util.attribute.get_primitive_type(attribute)
+            if data_type == "entity":
+                continue
+            if attribute.name() in profile_data:
+                new = self.props.material_set_item_profile_attributes.add()
+                new.name = attribute.name()
+                new.is_null = profile_data[attribute.name()] is None
+                new.is_optional = attribute.optional()
+                new.data_type = data_type
+                if data_type == "string":
+                    new.string_value = "" if new.is_null else profile_data[attribute.name()]
+                elif data_type == "float":
+                    new.float_value = 0.0 if new.is_null else profile_data[attribute.name()]
+                elif data_type == "integer":
+                    new.int_value = 0 if new.is_null else profile_data[attribute.name()]
+                elif data_type == "boolean":
+                    new.bool_value = False if new.is_null else profile_data[attribute.name()]
+                elif data_type == "enum":
+                    new.enum_items = json.dumps(ifcopenshell.util.attribute.get_enum_items(attribute))
+                    if profile_data[attribute.name()]:
+                        new.enum_value = profile_data[attribute.name()]
+
+                # Force null to be false if the attribute is mandatory because when we first assign a profile, all of
+                # its fields are null (which is illegal).
+                # TODO: find a better solution.
+                if not new.is_optional:
+                    new.is_null = False
 
 
 class DisableEditingMaterialSetItem(bpy.types.Operator):
@@ -468,16 +541,31 @@ class EditMaterialSetItem(bpy.types.Operator):
             )
             Data.load_layers()
         elif product_data["type"] == "IfcMaterialProfileSet":
+            profile_attributes = {}
+            for attribute in props.material_set_item_profile_attributes:
+                if attribute.data_type == "string":
+                    value = attribute.string_value
+                elif attribute.data_type == "float":
+                    value = attribute.float_value
+                elif attribute.data_type == "integer":
+                    value = attribute.int_value
+                elif attribute.data_type == "boolean":
+                    value = attribute.bool_value
+                elif attribute.data_type == "enum":
+                    value = attribute.enum_value
+                profile_attributes[attribute.name] = None if attribute.is_null else value
             ifcopenshell.api.run(
                 "material.edit_profile",
                 self.file,
                 **{
                     "profile": self.file.by_id(self.material_set_item),
                     "attributes": attributes,
+                    "profile_attributes": profile_attributes,
                     "material": self.file.by_id(int(obj.BIMObjectMaterialProperties.material_set_item_material)),
                 },
             )
             Data.load_profiles()
+            ProfileData.load(self.file)
         else:
             pass
 
diff --git a/src/blenderbim/blenderbim/bim/module/material/prop.py b/src/blenderbim/blenderbim/bim/module/material/prop.py
index 4795832bbc..ffa7c5d87a 100644
--- a/src/blenderbim/blenderbim/bim/module/material/prop.py
+++ b/src/blenderbim/blenderbim/bim/module/material/prop.py
@@ -1,5 +1,5 @@
 import bpy
-import blenderbim.bim.schema # refactor
+import blenderbim.bim.schema  # refactor
 from ifcopenshell.api.material.data import Data
 from blenderbim.bim.ifc import IfcStore
 from blenderbim.bim.prop import StrProperty, Attribute
@@ -17,6 +17,29 @@ from bpy.props import (
 
 materials_enum = []
 materialtypes_enum = []
+profileclasses_enum = []
+parameterizedprofileclasses_enum = []
+
+
+def getProfileClasses(self, context):
+    global profileclasses_enum
+    if len(profileclasses_enum) == 0 and IfcStore.get_schema():
+        profileclasses_enum.clear()
+        profileclasses_enum = [
+            (t.name(), t.name(), "") for t in IfcStore.get_schema().declaration_by_name("IfcProfileDef").subtypes()
+        ]
+    return profileclasses_enum
+
+
+def getParameterizedProfileClasses(self, context):
+    global parameterizedprofileclasses_enum
+    if len(parameterizedprofileclasses_enum) == 0 and IfcStore.get_schema():
+        parameterizedprofileclasses_enum.clear()
+        parameterizedprofileclasses_enum = [
+            (t.name(), t.name(), "")
+            for t in IfcStore.get_schema().declaration_by_name("IfcParameterizedProfileDef").subtypes()
+        ]
+    return parameterizedprofileclasses_enum
 
 
 def getMaterials(self, context):
@@ -52,4 +75,9 @@ class BIMObjectMaterialProperties(PropertyGroup):
     material_set_attributes: CollectionProperty(name="Material Set Attributes", type=Attribute)
     active_material_set_item_id: IntProperty(name="Active Material Set ID")
     material_set_item_attributes: CollectionProperty(name="Material Set Item Attributes", type=Attribute)
+    material_set_item_profile_attributes: CollectionProperty(name="Material Set Item Profile Attributes", type=Attribute)
     material_set_item_material: EnumProperty(items=getMaterials, name="Material")
+    profile_classes: EnumProperty(items=getProfileClasses, name="Profile Classes")
+    parameterized_profile_classes: EnumProperty(
+        items=getParameterizedProfileClasses, name="Parameterized Profile Classes"
+    )
diff --git a/src/blenderbim/blenderbim/bim/module/material/ui.py b/src/blenderbim/blenderbim/bim/module/material/ui.py
index 6d432f673a..591fa8ccb3 100644
--- a/src/blenderbim/blenderbim/bim/module/material/ui.py
+++ b/src/blenderbim/blenderbim/bim/module/material/ui.py
@@ -1,5 +1,6 @@
 from bpy.types import Panel
 from ifcopenshell.api.material.data import Data
+from ifcopenshell.api.profile.data import Data as ProfileData
 from blenderbim.bim.ifc import IfcStore
 
 
@@ -46,6 +47,8 @@ class BIM_PT_object_material(Panel):
             Data.load(IfcStore.get_file())
         if self.oprops.ifc_definition_id not in Data.products:
             Data.load(IfcStore.get_file(), self.oprops.ifc_definition_id)
+        if not ProfileData.is_loaded:
+            ProfileData.load(self.file)
         self.product_data = Data.products[self.oprops.ifc_definition_id]
 
         if not Data.materials:
@@ -172,6 +175,39 @@ class BIM_PT_object_material(Panel):
                 row.prop(attribute, "bool_value", text=attribute.name)
             row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
 
+        if self.set_item_name == "profile":
+            self.draw_assign_profile_ui(box, item)
+            self.draw_editable_profile_ui(box, item)
+
+    def draw_assign_profile_ui(self, layout, item):
+        row = layout.row(align=True)
+        row.prop(self.props, "profile_classes", text="")
+        if self.props.profile_classes == "IfcParameterizedProfileDef":
+            row.prop(self.props, "parameterized_profile_classes", text="")
+            op = row.operator("bim.assign_parameterized_profile", icon="GREASEPENCIL" if item["Profile"] else "ADD", text="")
+            op.ifc_class = self.props.parameterized_profile_classes
+            op.material_profile = item["id"]
+        else:
+            # TODO: support non parametric profiles by showing a list of named profiles to select from, or an
+            # eyedropper to pick profile geometry from the scene
+            row.operator("bim.disable_editing_material_set_item", icon="X", text="")
+
+    def draw_editable_profile_ui(self, layout, item):
+        for attribute in self.props.material_set_item_profile_attributes:
+            row = layout.row(align=True)
+            if attribute.data_type == "string":
+                row.prop(attribute, "string_value", text=attribute.name)
+            elif attribute.data_type == "integer":
+                row.prop(attribute, "int_value", text=attribute.name)
+            elif attribute.data_type == "float":
+                row.prop(attribute, "float_value", text=attribute.name)
+            elif attribute.data_type == "boolean":
+                row.prop(attribute, "bool_value", text=attribute.name)
+            elif attribute.data_type == "enum":
+                row.prop(attribute, "enum_value", text=attribute.name)
+            if attribute.is_optional:
+                row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
+
     def draw_read_only_set_item_ui(self, set_item_id, index, is_first=False, is_last=False):
         if self.product_data["type"] == "IfcMaterialList":
             item = Data.materials[set_item_id]
diff --git a/src/ifcopenshell-python/ifcopenshell/api/material/assign_profile.py b/src/ifcopenshell-python/ifcopenshell/api/material/assign_profile.py
new file mode 100644
index 0000000000..43580552c4
--- /dev/null
+++ b/src/ifcopenshell-python/ifcopenshell/api/material/assign_profile.py
@@ -0,0 +1,14 @@
+class Usecase:
+    def __init__(self, file, **settings):
+        self.file = file
+        self.settings = {"material_profile": None, "profile": None}
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        if (
+            self.settings["material_profile"].Profile
+            and len(self.file.get_inverse(self.settings["material_profile"].Profile)) == 1
+        ):
+            self.file.remove(self.settings["material_profile"].Profile)
+        self.settings["material_profile"].Profile = self.settings["profile"]
diff --git a/src/ifcopenshell-python/ifcopenshell/api/material/edit_profile.py b/src/ifcopenshell-python/ifcopenshell/api/material/edit_profile.py
index f833922d30..5ab716644b 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/material/edit_profile.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/material/edit_profile.py
@@ -4,6 +4,7 @@ class Usecase():
         self.settings = {
             "profile": None,
             "attributes": {},
+            "profile_attributes": {},
             "material": None
         }
         for key, value in settings.items():
@@ -13,3 +14,5 @@ class Usecase():
         for name, value in self.settings["attributes"].items():
             setattr(self.settings["profile"], name, value)
         self.settings["profile"].Material = self.settings["material"]
+        for name, value in self.settings["profile_attributes"].items():
+            setattr(self.settings["profile"].Profile, name, value)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/profile/add_parameterized_profile.py b/src/ifcopenshell-python/ifcopenshell/api/profile/add_parameterized_profile.py
new file mode 100644
index 0000000000..39abc879e8
--- /dev/null
+++ b/src/ifcopenshell-python/ifcopenshell/api/profile/add_parameterized_profile.py
@@ -0,0 +1,9 @@
+class Usecase:
+    def __init__(self, file, **settings):
+        self.file = file
+        self.settings = {"ifc_class": None}
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        return self.file.create_entity(self.settings["ifc_class"])
diff --git a/src/ifcopenshell-python/ifcopenshell/api/profile/data.py b/src/ifcopenshell-python/ifcopenshell/api/profile/data.py
new file mode 100644
index 0000000000..99b96a13e9
--- /dev/null
+++ b/src/ifcopenshell-python/ifcopenshell/api/profile/data.py
@@ -0,0 +1,17 @@
+class Data:
+    is_loaded = False
+    profiles = {}
+
+    @classmethod
+    def purge(cls):
+        cls.is_loaded = False
+        cls.profiles = {}
+
+    @classmethod
+    def load(cls, file):
+        if not file:
+            return
+        cls.profiles = {}
+        for profile in file.by_type("IfcProfileDef"):
+            cls.profiles[profile.id()] = profile.get_info()
+        cls.is_loaded = True