diff --git a/lib/process-services-cloud/src/lib/form/components/widgets/dropdown/dropdown-cloud.widget.ts b/lib/process-services-cloud/src/lib/form/components/widgets/dropdown/dropdown-cloud.widget.ts
index 71224fc33d..c9b968ba24 100644
--- a/lib/process-services-cloud/src/lib/form/components/widgets/dropdown/dropdown-cloud.widget.ts
+++ b/lib/process-services-cloud/src/lib/form/components/widgets/dropdown/dropdown-cloud.widget.ts
@@ -41,6 +41,7 @@ import { TaskVariableCloud } from '../../../models/task-variable-cloud.model';
 import { FormCloudService } from '../../../services/form-cloud.service';
 import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
 import { FormUtilsService } from '../../../services/form-utils.service';
+import { defaultValueValidator } from './validators';
 
 export const DEFAULT_OPTION = {
     id: 'empty',
@@ -198,7 +199,14 @@ export class DropdownCloudWidgetComponent extends WidgetComponent implements OnI
     }
 
     private updateFormControlState(): void {
-        this.dropdownControl.setValidators(this.isRequired() && this.field?.isVisible ? [Validators.required] : []);
+        const isRequired = this.isRequired();
+
+        this.dropdownControl.setValidators(this.isRequired && this.field?.isVisible ? [Validators.required] : []);
+
+        const addSelectDefaultOptionValidator = isRequired && this.field.hasEmptyValue;
+        if (addSelectDefaultOptionValidator) {
+            this.dropdownControl.addValidators([defaultValueValidator(this.field)]);
+        }
 
         this.field?.readOnly || this.readOnly
             ? this.dropdownControl.disable({ emitEvent: false })
diff --git a/lib/process-services-cloud/src/lib/form/components/widgets/dropdown/validators.ts b/lib/process-services-cloud/src/lib/form/components/widgets/dropdown/validators.ts
new file mode 100644
index 0000000000..639ae71f2c
--- /dev/null
+++ b/lib/process-services-cloud/src/lib/form/components/widgets/dropdown/validators.ts
@@ -0,0 +1,37 @@
+/*!
+ * @license
+ * Copyright © 2005-2024 Hyland Software, Inc. and its affiliates. All rights reserved.
+ *
+ * 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.
+ */
+
+import { FormFieldModel } from '@alfresco/adf-core';
+import { ValidatorFn, AbstractControl, ValidationErrors } from '@angular/forms';
+import { DEFAULT_OPTION } from './dropdown-cloud.widget';
+
+export const defaultValueValidator =
+    (filed: FormFieldModel): ValidatorFn =>
+    (control: AbstractControl): ValidationErrors | null => {
+        const optionsWithNoDefaultValue = filed.options.filter((dropdownOption) => {
+            const isDefaultValue = dropdownOption.id === DEFAULT_OPTION.id && dropdownOption.name === DEFAULT_OPTION.name;
+
+            return !isDefaultValue;
+        });
+
+        const isSomeOptionSelected = optionsWithNoDefaultValue.some((dropdownOption) => {
+            const isOptionSelected = dropdownOption.id === control.value?.id;
+            return isOptionSelected;
+        });
+
+        return isSomeOptionSelected ? null : { required: true };
+    };