diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000000..17216d5cc3
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,79 @@
+[build-system]
+requires = ["setuptools>=61.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "global-workflow"
+version = "0.1.0"
+description = "NOAA Global Workflow Python Infrastructure"
+readme = "README.md"
+requires-python = "~=3.11"
+authors = [
+    { name = "Barry Baker" }
+]
+license = { text = "BSD-3-Clause" }
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "Operating System :: OS Independent",
+]
+dependencies = [
+    "certifi",
+    "cftime",
+    "click",
+    "f90nml",
+    "jcb @ git+https://github.com/noaa-emc/jcb.git@0.1.0",
+    "Jinja2",
+    "MarkupSafe",
+    "netCDF4",
+    "numpy",
+    "pandas",
+    "PyYAML",
+    "xarray",
+    "wxflow @ git+https://github.com/noaa-emc/wxflow.git@v0.4.0",
+]
+
+[project.optional-dependencies]
+gcafs = [
+    # GCAFS Specific dependencies if any are identified later
+]
+globus = [
+    "globus-cli",
+]
+gfs = [
+    # GFS specific dependencies if any are identified later
+]
+gefs = [
+    # GEFS specific dependencies if any are identified later
+]
+sfs = [
+    # SFS specific dependencies if any are identified later
+]
+testing = [
+    "pytest",
+    "pytest-cov",
+    "pycodestyle",
+]
+docs = [
+    "sphinx",
+    "sphinx-rtd-theme",
+    "sphinxcontrib-bibtex",
+    "sphinx-autobuild",
+    "sphinx-copybutton",
+]
+deployment = [
+    "pip-tools"
+]
+all = [
+    "global-workflow[gcafs,globus,gfs,gefs,sfs,testing,docs,deployment]",
+]
+
+[tool.setuptools]
+package-dir = {"" = "ush/python"}
+
+[tool.setuptools.packages.find]
+where = ["ush/python"]
+include = ["pygfs*", "jcb*", "ufsda*", "soca*", "pyiodaconv*", "gsincdiag_to_ioda*"]
+
+[tool.pytest.ini_options]
+testpaths = ["dev/test", "dev/ctests"]
+python_files = "*.py"
diff --git a/versions/requirements_gcafs.txt b/versions/requirements_gcafs.txt
index e7fb328035..1f26cc99f8 100644
--- a/versions/requirements_gcafs.txt
+++ b/versions/requirements_gcafs.txt
@@ -2,16 +2,15 @@ certifi==2026.2.25
 cftime==1.6.5
 click==8.3.1
 f90nml==1.5.0
-jcb==0.1.0
-Jinja2==3.1.6
-MarkupSafe==3.0.3
-netCDF4==1.7.4
+jcb @ git+https://github.com/noaa-emc/jcb.git@0.1.0
+jinja2==3.1.6
+markupsafe==3.0.3
+netcdf4==1.7.4
 numpy==2.4.2
 packaging==26.0
 pandas==3.0.1
-pycodestyle==2.14.0
 python-dateutil==2.9.0.post0
-PyYAML==6.0.3
+pyyaml==6.0.3
 six==1.17.0
-wxflow==0.3.0
-xarray==2026.2.0
\ No newline at end of file
+wxflow @ git+https://github.com/noaa-emc/wxflow.git@v0.4.0
+xarray==2026.2.0