---
title: "For Marketing Agencies — The Marketing Engineer You Bring In | Carlos Arias"
description: "Marketing agencies bring me in for complex SEO audits, technical builds, AI and automation, and difficult client work. A senior Marketing Engineer, under your brand or mine."
url: "https://carlosarias.com/agencies"
---

For marketing agencies

# Agencies don’t call me because they’re short-staffed. They call me when the project gets complicated.

Complex SEO audits. Websites that have to do something unusual. CRM, tracking and API work that stalled. AI and automation nobody on the team has built before. I’ve spent twenty years on both sides of the agency table — ten of them running my own — and agencies still bring me in when a project outgrows the team they have.

  Bring me into a project See what I take on
- **1000+**:  Websites built
- **15+**:  Developers and strategists hired and led
- **25+ yrs**:  In digital marketing and agency work
- **3→50**:  Cases a month, one PI campaign

Client work is covered by NDA. The two agencies quoted below are named with permission.

In their words

## The people who hire specialists for a living.

> Carlos has been a huge asset to our team at Ten Golden Rules. He combines sharp strategic thinking with deep AI expertise, and he's always the first to jump in, solve problems, and help wherever we need extra capacity. Reliable, proactive, and genuinely great to work with, I recommend him without hesitation.

*Bill B. Director of Search and Strategy, Ten Golden Rules*

> We hired Carlos as a CTO for our Agency and he has been amazing with setting up processes for our agency. He helped hire the right talent and setup processes to help streamline website development, SEO processes for our clients.

*Marc G. Founder, Netwide Media Group*

Why it happens

## When a good agency brings in outside help.

Bringing in a specialist isn’t a sign an agency is struggling. It’s how the good ones protect a client relationship they’ve spent years building. Nobody staffs full-time for the problem that shows up twice a year.

1. ### The project got technically complex And the estimate keeps growing every time someone looks at it.
2. ### The internal team is stuck Not for lack of talent. It's outside what they've built before.
3. ### An audit needs to go deeper than a checklist The kind where the answer is in the log files, not the dashboard.
4. ### A high-value client needs senior attention The account you cannot afford to hand to a junior strategist.
5. ### CRM, tracking, APIs and reporting are involved The point where marketing quietly turns into software.
6. ### A build has unusual requirements The site has to do something no template does.
7. ### AI and automation are on the table You've sold it, or you're about to, and someone has to actually build it.
8. ### Strategy is needed without another executive hire Senior judgment on a project, not a salary line.
9. ### You need to hire senior technical people And nobody in the building can tell the good candidates from the confident ones.
10. ### A build was inherited and nobody wants to touch it Someone has to go in, work out what's actually there, and take it over.

What I take on

## Two kinds of work, and one of them is rare.

### Delivery

The work agencies already run through me.

- #### SEO & technical SEO Audits, migrations, site architecture, local search, recovery work.
- #### Websites & landing pages Design and build, conversion work, performance.
- #### Digital marketing Campaign strategy, competitive research, positioning.
- #### Branding Identity, messaging, and the design system that keeps it consistent.

### The hard stuff

Where most agencies run out of bench.

- #### AI & automation builds Agentic systems, content pipelines, internal tooling — the thing your team quoted six weeks for.
- #### CRM, integrations & tracking HubSpot, GHL, custom APIs, attribution that survives an audit.
- #### Technical marketing engineering Analytics, data plumbing, reporting a client can actually read.
- #### Fractional CTO Building and leading the team, not just doing the work: hiring, evaluating technical candidates, delivery process, stack. Two agencies have hired me for exactly this.

How we work together

## Under your brand or mine — your call.

I can join your Slack, email from your domain and sit in client calls as part of your team, or stay entirely behind the scenes and hand the work to you. I don’t have a preference and I don’t need the credit.

- ### You keep the client relationship Always. I'm not building a roster out of your accounts.
- ### One person, start to finish No account manager, no handoff, no junior picking it up on Tuesday.
- ### Scoped by project or retainer Whichever matches how you bill it.
- ### NDAs and white-label terms are normal here Send yours, or use mine.

The part agencies actually ask about

I don’t take direct clients in a market where I’m working for your agency. If you bring me into an account, that account is yours.

>

Carlos Arias