diff --git a/src/job/run.ts b/src/job/run.ts
index c05278b..c837d75 100644
--- a/src/job/run.ts
+++ b/src/job/run.ts
@@ -1,5 +1,6 @@
 import createDebugger from 'debug';
 import { Job } from '.';
+import { JobError } from '../utils';
 
 const debug = createDebugger('pulse:job');
 
@@ -77,7 +78,7 @@ export const run: RunMethod = async function (this: Job) {
       debug('[%s:%s] starting job', this.attrs.name, this.attrs._id);
       if (!definition) {
         debug('[%s:%s] has no definition, can not run', this.attrs.name, this.attrs._id);
-        throw new Error('Undefined job');
+        throw new JobError('Undefined job');
       }
 
       if (definition.fn.length === 2) {
diff --git a/src/pulse/database.ts b/src/pulse/database.ts
index 9b5e5a7..6b7d93b 100644
--- a/src/pulse/database.ts
+++ b/src/pulse/database.ts
@@ -1,6 +1,7 @@
 import createDebugger from 'debug';
 import { AnyError, Collection, MongoClient, MongoClientOptions } from 'mongodb';
 import { Pulse } from '.';
+import { BaseError } from '../utils';
 import { hasMongoProtocol } from './has-mongo-protocol';
 
 const debug = createDebugger('pulse:database');
@@ -46,7 +47,7 @@ export const database: DatabaseMethod = async function (this: Pulse, url, collec
   });
 
   if (!client) {
-    throw new Error('Mongo Client is undefined');
+    throw new BaseError('Mongo Client is undefined');
   }
 
   this._db = client;
diff --git a/src/pulse/save-job.ts b/src/pulse/save-job.ts
index a64ed44..efe605d 100644
--- a/src/pulse/save-job.ts
+++ b/src/pulse/save-job.ts
@@ -2,7 +2,7 @@ import createDebugger from 'debug';
 import { ObjectId } from 'mongodb';
 import { Pulse } from '.';
 import { Job } from '../job';
-import { processJobs } from '../utils';
+import { JobError, processJobs } from '../utils';
 
 const debug = createDebugger('pulse:saveJob');
 
@@ -72,6 +72,10 @@ export type SaveJobMethod = (job: Job) => Promise<Job>;
  */
 export const saveJob: SaveJobMethod = async function (this: Pulse, job) {
   try {
+    if (!this._collection) {
+      throw new JobError('A db must be set up before you can save a job');
+    }
+
     debug('attempting to save a job into Pulse instance');
 
     // Grab information needed to save job but that we don't want to persist in MongoDB
diff --git a/src/utils/error.ts b/src/utils/error.ts
new file mode 100644
index 0000000..723c0e8
--- /dev/null
+++ b/src/utils/error.ts
@@ -0,0 +1,15 @@
+export class BaseError extends Error {
+  constructor(public message: string) {
+    super(message);
+    this.name = this.constructor.name;
+    Object.setPrototypeOf(this, new.target.prototype);
+  }
+}
+
+export class JobError extends BaseError {
+  constructor(public message: string) {
+    super(message);
+    this.name = this.constructor.name;
+    Object.setPrototypeOf(this, new.target.prototype);
+  }
+}
diff --git a/src/utils/index.ts b/src/utils/index.ts
index 54c0efb..3cf45d4 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -1,3 +1,4 @@
-export * from "./create-job";
-export * from "./parse-priority";
-export * from "./process-jobs";
+export * from './create-job';
+export * from './error';
+export * from './parse-priority';
+export * from './process-jobs';
diff --git a/src/utils/process-jobs.ts b/src/utils/process-jobs.ts
index e301f4a..269cbe0 100644
--- a/src/utils/process-jobs.ts
+++ b/src/utils/process-jobs.ts
@@ -2,6 +2,7 @@ import createDebugger from 'debug';
 import { Job } from '../job';
 import { Pulse } from '../pulse';
 import { createJob } from './create-job';
+import { JobError } from './error';
 
 const debug = createDebugger('pulse:internal:processJobs');
 
@@ -317,7 +318,7 @@ export const processJobs = async function (this: Pulse, extraJob: Job): Promise<
     // Job isn't in running jobs so throw an error
     if (!self._runningJobs.includes(job)) {
       debug('[%s] callback was called, job must have been marked as complete already', job.attrs._id);
-      throw new Error(`callback already called - job ${name} already marked complete`);
+      throw new JobError(`callback already called - job ${name} already marked complete`);
     }
 
     // Remove the job from the running queue