diff --git a/spring-data-jdbc/src/main/java/org/springframework/data/jdbc/core/JdbcAggregateTemplate.java b/spring-data-jdbc/src/main/java/org/springframework/data/jdbc/core/JdbcAggregateTemplate.java
index 2f1ee6fc6..84076fa5d 100644
--- a/spring-data-jdbc/src/main/java/org/springframework/data/jdbc/core/JdbcAggregateTemplate.java
+++ b/spring-data-jdbc/src/main/java/org/springframework/data/jdbc/core/JdbcAggregateTemplate.java
@@ -320,17 +320,15 @@ public class JdbcAggregateTemplate implements JdbcAggregateOperations {
 
 	@Override
 	public <T> Optional<T> findOne(Query query, Class<T> domainType) {
-		return accessStrategy.findOne(query, domainType);
+		return accessStrategy.findOne(query, domainType).map(this::triggerAfterConvert);
 	}
 
 	@Override
 	public <T> List<T> findAll(Query query, Class<T> domainType) {
 
 		Iterable<T> all = accessStrategy.findAll(query, domainType);
-		if (all instanceof List<T> list) {
-			return list;
-		}
-		return Streamable.of(all).toList();
+
+		return triggerAfterConvert(all);
 	}
 
 	@Override
diff --git a/spring-data-jdbc/src/test/java/org/springframework/data/jdbc/core/JdbcAggregateTemplateUnitTests.java b/spring-data-jdbc/src/test/java/org/springframework/data/jdbc/core/JdbcAggregateTemplateUnitTests.java
index 2e75ebd31..f5af0c6ba 100644
--- a/spring-data-jdbc/src/test/java/org/springframework/data/jdbc/core/JdbcAggregateTemplateUnitTests.java
+++ b/spring-data-jdbc/src/test/java/org/springframework/data/jdbc/core/JdbcAggregateTemplateUnitTests.java
@@ -47,8 +47,11 @@ import org.springframework.data.relational.core.mapping.event.AfterSaveCallback;
 import org.springframework.data.relational.core.mapping.event.BeforeConvertCallback;
 import org.springframework.data.relational.core.mapping.event.BeforeDeleteCallback;
 import org.springframework.data.relational.core.mapping.event.BeforeSaveCallback;
+import org.springframework.data.relational.core.query.Criteria;
+import org.springframework.data.relational.core.query.Query;
 
 import java.util.List;
+import java.util.Optional;
 
 /**
  * Unit tests for {@link JdbcAggregateTemplate}.
@@ -299,12 +302,13 @@ public class JdbcAggregateTemplateUnitTests {
 		SampleEntity neumann1 = new SampleEntity(42L, "Neumann");
 		SampleEntity neumann2 = new SampleEntity(42L, "Alfred E. Neumann");
 
-		when(dataAccessStrategy.findAll(SampleEntity.class, PageRequest.of(0, 20))).thenReturn(asList(alfred1, neumann1));
+		PageRequest pageRequest = PageRequest.of(0, 20);
+		when(dataAccessStrategy.findAll(SampleEntity.class, pageRequest)).thenReturn(asList(alfred1, neumann1));
 
 		when(callbacks.callback(any(Class.class), eq(alfred1), any(Object[].class))).thenReturn(alfred2);
 		when(callbacks.callback(any(Class.class), eq(neumann1), any(Object[].class))).thenReturn(neumann2);
 
-		Iterable<SampleEntity> all = template.findAll(SampleEntity.class, PageRequest.of(0, 20));
+		Iterable<SampleEntity> all = template.findAll(SampleEntity.class, pageRequest);
 
 		verify(callbacks).callback(AfterConvertCallback.class, alfred1);
 		verify(callbacks).callback(AfterConvertCallback.class, neumann1);
@@ -312,6 +316,49 @@ public class JdbcAggregateTemplateUnitTests {
 		assertThat(all).containsExactly(alfred2, neumann2);
 	}
 
+	@Test // GH-1979
+	void callbackOnFindAllByQuery() {
+
+		SampleEntity alfred1 = new SampleEntity(23L, "Alfred");
+		SampleEntity alfred2 = new SampleEntity(23L, "Alfred E.");
+
+		SampleEntity neumann1 = new SampleEntity(42L, "Neumann");
+		SampleEntity neumann2 = new SampleEntity(42L, "Alfred E. Neumann");
+
+		Query query = Query.query(Criteria.where("not relevant").is("for test"));
+
+		when(dataAccessStrategy.findAll(query, SampleEntity.class)).thenReturn(asList(alfred1, neumann1));
+
+		when(callbacks.callback(any(Class.class), eq(alfred1), any(Object[].class))).thenReturn(alfred2);
+		when(callbacks.callback(any(Class.class), eq(neumann1), any(Object[].class))).thenReturn(neumann2);
+
+		Iterable<SampleEntity> all = template.findAll(query, SampleEntity.class);
+
+		verify(callbacks).callback(AfterConvertCallback.class, alfred1);
+		verify(callbacks).callback(AfterConvertCallback.class, neumann1);
+
+		assertThat(all).containsExactly(alfred2, neumann2);
+	}
+
+	@Test // GH-1979
+	void callbackOnFindOneByQuery() {
+
+		SampleEntity alfred1 = new SampleEntity(23L, "Alfred");
+		SampleEntity alfred2 = new SampleEntity(23L, "Alfred E.");
+
+		Query query = Query.query(Criteria.where("not relevant").is("for test"));
+
+		when(dataAccessStrategy.findOne(query, SampleEntity.class)).thenReturn(Optional.of(alfred1));
+
+		when(callbacks.callback(any(Class.class), eq(alfred1), any(Object[].class))).thenReturn(alfred2);
+
+		Optional<SampleEntity> all = template.findOne(query, SampleEntity.class);
+
+		verify(callbacks).callback(AfterConvertCallback.class, alfred1);
+
+		assertThat(all).contains(alfred2);
+	}
+
 	@Test // GH-1401
 	void saveAllWithEmptyListDoesNothing() {
 		assertThat(template.saveAll(emptyList())).isEmpty();