diff --git a/common/ponresourcemanager/ponresourcemanager.go b/common/ponresourcemanager/ponresourcemanager.go
index 74734f0..1544b8d 100755
--- a/common/ponresourcemanager/ponresourcemanager.go
+++ b/common/ponresourcemanager/ponresourcemanager.go
@@ -125,7 +125,7 @@
 	Port           int    // port number for the KV store
 	OLTModel       string
 	KVStore        *model.Backend
-	TechProfileMgr *tp.TechProfileMgr
+	TechProfileMgr tp.TechProfileIf // create object of *tp.TechProfileMgr
 
 	// Below attribute, pon_resource_ranges, should be initialized
 	// by reading from KV store.
diff --git a/common/techprofile/tech_profile_if.go b/common/techprofile/tech_profile_if.go
new file mode 100644
index 0000000..1ed38db
--- /dev/null
+++ b/common/techprofile/tech_profile_if.go
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2019-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package techprofile
+
+import (
+	"github.com/opencord/voltha-go/db/model"
+	tp_pb "github.com/opencord/voltha-protos/go/tech_profile"
+)
+
+type TechProfileIf interface {
+	SetKVClient() *model.Backend
+	GetTechProfileInstanceKVPath(techProfiletblID uint32, uniPortName string) string
+	GetTPInstanceFromKVStore(techProfiletblID uint32, path string) (*TechProfile, error)
+	CreateTechProfInstance(techProfiletblID uint32, uniPortName string, intfId uint32) *TechProfile
+	DeleteTechProfileInstance(techProfiletblID uint32, uniPortName string) error
+	GetprotoBufParamValue(paramType string, paramKey string) int32
+	GetUsScheduler(tpInstance *TechProfile) *tp_pb.SchedulerConfig
+	GetDsScheduler(tpInstance *TechProfile) *tp_pb.SchedulerConfig
+	GetTrafficScheduler(tpInstance *TechProfile, SchedCfg *tp_pb.SchedulerConfig,
+		ShapingCfg *tp_pb.TrafficShapingInfo) *tp_pb.TrafficScheduler
+	GetTrafficQueues(tp *TechProfile, Dir tp_pb.Direction) []*tp_pb.TrafficQueue
+	GetGemportIDForPbit(tp *TechProfile, Dir tp_pb.Direction, pbit uint32) uint32
+}