diff --git a/poetry.lock b/poetry.lock
index f235cb2..9d1e5fe 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -3749,4 +3749,4 @@ files = [
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.10"
-content-hash = "ffde300b2fc93161d2279a6e2b899bc988d3b5eb3833135821830affc9a5fb62"
+content-hash = "66c9adf647316db90f963da05e8a83574378bfa4db2c69ce751446b5ee7c408c"
diff --git a/pyproject.toml b/pyproject.toml
index 00784cc..48a9e1c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,7 +50,7 @@ dependencies = [
   "pyyaml (>=6.0.3,<7.0.0)",
   "click (>=8.1.0,<9.0.0)",
   "matplotlib (>=3.8.0,<4.0.0)",
-  "paramiko (>=4.0.0)"
+  "paramiko (>=3.5.1)"
 ]
 
 # [project.optional-dependencies] Commented out to prevent Tox tests from failing
diff --git a/src/ria_toolkit_oss/orchestration/campaign.py b/src/ria_toolkit_oss/orchestration/campaign.py
index 027c33f..5fe1128 100644
--- a/src/ria_toolkit_oss/orchestration/campaign.py
+++ b/src/ria_toolkit_oss/orchestration/campaign.py
@@ -233,6 +233,9 @@ class TransmitterConfig:
     # For sdr_remote control — keys: host, ssh_user, ssh_key_path, device_type, device_id, zmq_port
     sdr_remote: Optional[dict] = None
 
+    # For sdr_agent control — keys: modulation, order, symbol_rate, center_frequency, filter, rolloff
+    sdr_agent: Optional[dict] = None
+
     @classmethod
     def from_dict(cls, d: dict) -> "TransmitterConfig":
         schedule = [CaptureStep.from_dict(s) for s in d.get("schedule", [])]
@@ -244,6 +247,7 @@ class TransmitterConfig:
             script=d.get("script"),
             device=d.get("device"),
             sdr_remote=d.get("sdr_remote"),
+            sdr_agent=d.get("sdr_agent"),
         )
 
 
diff --git a/src/ria_toolkit_oss/orchestration/executor.py b/src/ria_toolkit_oss/orchestration/executor.py
index 3467995..445b16b 100644
--- a/src/ria_toolkit_oss/orchestration/executor.py
+++ b/src/ria_toolkit_oss/orchestration/executor.py
@@ -5,6 +5,7 @@ from __future__ import annotations
 import json
 import logging
 import subprocess
+import threading
 import time
 from dataclasses import dataclass, field
 from pathlib import Path
@@ -16,6 +17,7 @@ from ria_toolkit_oss.io.recording import to_sigmf
 from .campaign import CampaignConfig, CaptureStep, TransmitterConfig
 from .labeler import build_output_filename, label_recording
 from .qa import QAResult, check_recording
+from .tx_executor import TxExecutor
 
 logger = logging.getLogger(__name__)
 
@@ -212,6 +214,7 @@ class CampaignExecutor:
         self.progress_cb = progress_cb
         self._sdr = None
         self._remote_tx_controllers: dict = {}
+        self._tx_executors: dict[str, tuple] = {}  # tx_id → (TxExecutor, stop_event, thread)
 
         if verbose:
             logging.basicConfig(level=logging.DEBUG)
@@ -266,6 +269,7 @@ class CampaignExecutor:
         finally:
             self._close_sdr()
             self._close_remote_tx_controllers()
+            self._close_tx_executors()
 
         result.end_time = time.time()
         logger.info(
@@ -340,6 +344,12 @@ class CampaignExecutor:
                 logger.warning(f"Error closing remote Tx controller {tx_id}: {exc}")
         self._remote_tx_controllers.clear()
 
+    def _close_tx_executors(self) -> None:
+        for tx_id, (_, stop_event, t) in list(self._tx_executors.items()):
+            stop_event.set()
+            t.join(timeout=5.0)
+        self._tx_executors.clear()
+
     def _record(self, duration_s: float) -> Recording:
         """Capture ``duration_s`` seconds of IQ samples."""
         num_samples = int(duration_s * self.config.recorder.sample_rate)
@@ -453,6 +463,27 @@ class CampaignExecutor:
             # Start transmission in background; _record() runs concurrently
             ctrl.transmit_async(step.duration + 1.0)
 
+        elif transmitter.control_method == "sdr_agent":
+            if not transmitter.sdr_agent:
+                logger.warning(f"Transmitter '{transmitter.id}' has no sdr_agent config — skipping")
+                return
+            step_dict: dict = {"label": step.label, "duration": step.duration + 1.0}
+            if step.power_dbm is not None:
+                step_dict["power_dbm"] = step.power_dbm
+            tx_config = {
+                "id": transmitter.id,
+                "sdr_agent": transmitter.sdr_agent,
+                "schedule": [step_dict],
+            }
+            rec = self.config.recorder
+            tx_device = transmitter.device or rec.device
+            sdr_device = _DEVICE_ALIASES.get(tx_device.lower(), tx_device.lower())
+            stop_event = threading.Event()
+            executor = TxExecutor(tx_config, sdr_device=sdr_device, stop_event=stop_event)
+            t = threading.Thread(target=executor.run, daemon=True, name=f"tx-{transmitter.id}")
+            self._tx_executors[transmitter.id] = (executor, stop_event, t)
+            t.start()
+
         else:
             logger.warning(f"Unknown control method '{transmitter.control_method}' — skipping")
 
@@ -475,6 +506,13 @@ class CampaignExecutor:
             if ctrl is not None:
                 ctrl.wait_transmit(timeout=step.duration + 10.0)
 
+        elif transmitter.control_method == "sdr_agent":
+            entry = self._tx_executors.pop(transmitter.id, None)
+            if entry is not None:
+                _, stop_event, t = entry
+                stop_event.set()
+                t.join(timeout=step.duration + 10.0)
+
     @staticmethod
     def _step_params_json(transmitter: TransmitterConfig, step: CaptureStep) -> str:
         """Serialise step parameters to a JSON string for the control script."""