diff --git a/pympipool/__init__.py b/pympipool/__init__.py
index 80edaf05..e344cbe0 100644
--- a/pympipool/__init__.py
+++ b/pympipool/__init__.py
@@ -1,4 +1,11 @@
 from ._version import get_versions
+from pympipool.mpi.executor import PyMPIExecutor
+from pympipool.slurm.executor import PySlurmExecutor
+
+try:  # The PyFluxExecutor requires flux-core to be installed.
+    from pympipool.flux.executor import PyFluxExecutor
+except ImportError:
+    pass
 
 __version__ = get_versions()["version"]
 del get_versions