diff --git a/README.md b/README.md
index 54b2fa7..bd4199e 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1597 TILs and counting..._
+_1598 TILs and counting..._
 
 See some of the other learning resources I work on:
 - [Ruby Operator Lookup](https://www.visualmode.dev/ruby-operators)
@@ -111,6 +111,7 @@ See some of the other learning resources I work on:
 - [AWS CLI Requires Groff Executable](aws/aws-cli-requires-groff-executable.md)
 - [Find And Follow Server Logs](aws/find-and-follow-server-logs.md)
 - [Sign Up User With Email And Password](aws/sign-up-user-with-email-and-password.md)
+- [Use Specific AWS Profile With CLI](aws/use-specific-aws-profile-with-cli.md)
 
 ### Brew
 
diff --git a/aws/use-specific-aws-profile-with-cli.md b/aws/use-specific-aws-profile-with-cli.md
new file mode 100644
index 0000000..d382de5
--- /dev/null
+++ b/aws/use-specific-aws-profile-with-cli.md
@@ -0,0 +1,37 @@
+# Use Specific AWS Profile With CLI
+
+I have multiple AWS profiles authenticated with the AWS CLI. For some projects
+I need to use the `default` one and for others I need to use the other.
+
+First, I can list the available profiles like so:
+
+```bash
+$ aws configure list-profiles
+default
+dev-my-app
+```
+
+For one-off commands I can specify the profile for any AWS CLI command using
+the `--profile` flag.
+
+```bash
+$ aws ecs list-clusters --profile josh-visualmode
+```
+
+However, I don't want to have to specify that flag every time when I'm working
+on a specific project. Instead I can specify the profile with an environment
+variable. The [`direnv`](https://direnv.net/) tool is a great way to do this on
+a per-project / per-directory basis.
+
+I can create or update the `.envrc` file (assuming I have `direnv` installed)
+adding the following line (and re-allowing the changed file):
+
+```
+# .envrc
+export AWS_PROFILE=dev-my-app
+```
+
+Now, any AWS command I issue from that directory or its subdirectories will use
+that profile by default.
+
+[source](https://docs.aws.amazon.com/cli/v1/userguide/cli-configure-files.html#cli-configure-files-using-profiles)