diff --git a/vscode-extensions/vscode-concourse/src/main/java/org/springframework/ide/vscode/concourse/ConcourseValueParsers.java b/vscode-extensions/vscode-concourse/src/main/java/org/springframework/ide/vscode/concourse/ConcourseValueParsers.java
index 905a2fbc1..09edf1e85 100644
--- a/vscode-extensions/vscode-concourse/src/main/java/org/springframework/ide/vscode/concourse/ConcourseValueParsers.java
+++ b/vscode-extensions/vscode-concourse/src/main/java/org/springframework/ide/vscode/concourse/ConcourseValueParsers.java
@@ -46,6 +46,10 @@ public class ConcourseValueParsers {
 		return acceptOnlyUniqueNames(models::getJobNames, "job name");
 	}
 
+	public static SchemaContextAware<ValueParser> resourceTypeNameDef(ConcourseModel models) {
+		return acceptOnlyUniqueNames(models::getResourceTypeNames, "resource-type name");
+	}
+
 	public static SchemaContextAware<ValueParser> acceptOnlyUniqueNames(
 			Function<IDocument, Multiset<String>> getDefinedNameCounts,
 			String typeName
@@ -70,6 +74,4 @@ public class ConcourseValueParsers {
 					+ " '2h45m'. Valid time units are 'ns', 'us' (or 'µs'), 'ms', 's', "
 			+ "'m', 'h'."
 	);
-
-
 }
diff --git a/vscode-extensions/vscode-concourse/src/main/java/org/springframework/ide/vscode/concourse/PipelineYmlSchema.java b/vscode-extensions/vscode-concourse/src/main/java/org/springframework/ide/vscode/concourse/PipelineYmlSchema.java
index ce65c6a14..b02fd1f29 100644
--- a/vscode-extensions/vscode-concourse/src/main/java/org/springframework/ide/vscode/concourse/PipelineYmlSchema.java
+++ b/vscode-extensions/vscode-concourse/src/main/java/org/springframework/ide/vscode/concourse/PipelineYmlSchema.java
@@ -143,6 +143,8 @@ public class PipelineYmlSchema implements YamlSchema {
 		resourceNameDef.parseWith(ConcourseValueParsers.resourceNameDef(models));
 		YAtomicType jobNameDef = f.yatomic("Job Name");
 		jobNameDef.parseWith(ConcourseValueParsers.jobNameDef(models));
+		YAtomicType resourceTypeNameDef = f.yatomic("ResourceType Name");
+		resourceTypeNameDef.parseWith(ConcourseValueParsers.resourceTypeNameDef(models));
 
 		YBeanType getStep = f.ybean("GetStep");
 		addProp(getStep, "get", t_resource_name);
@@ -221,7 +223,7 @@ public class PipelineYmlSchema implements YamlSchema {
 		addProp(job, "disable_manual_trigger", t_boolean);
 
 		YBeanType resourceType = f.ybean("ResourceType");
-		addProp(resourceType, "name", t_ne_string).isRequired(true);
+		addProp(resourceType, "name", resourceTypeNameDef).isRequired(true);
 		addProp(resourceType, "type", t_image_type).isRequired(true);
 		addProp(resourceType, "source", resourceSource);
 
diff --git a/vscode-extensions/vscode-concourse/src/test/java/org/springframework/ide/vscode/concourse/PipelineYamlEditorTest.java b/vscode-extensions/vscode-concourse/src/test/java/org/springframework/ide/vscode/concourse/PipelineYamlEditorTest.java
index 1da94ba6e..7d5ec1980 100644
--- a/vscode-extensions/vscode-concourse/src/test/java/org/springframework/ide/vscode/concourse/PipelineYamlEditorTest.java
+++ b/vscode-extensions/vscode-concourse/src/test/java/org/springframework/ide/vscode/concourse/PipelineYamlEditorTest.java
@@ -520,6 +520,21 @@ public class PipelineYamlEditorTest {
 		);
 	}
 
+	@Test
+	public void reconcileDuplicateResourceTypeNames() throws Exception {
+		Editor editor = harness.newEditor(
+				"resource_types:\n" +
+				"- name: slack-notification\n" +
+				"  type: docker_image\n" +
+				"- name: slack-notification\n" +
+				"  type: docker_image"
+		);
+		editor.assertProblems(
+				"slack-notification|Duplicate resource-type name",
+				"slack-notification|Duplicate resource-type name"
+		);
+	}
+
 	@Test
 	public void reconcileDuplicateJobNames() throws Exception {
 		Editor editor = harness.newEditor(