ONESUN STRATEGIES · FOUNDER-LED

Modern-Day Engineering.

Consulting, advisory, and fractional technical leadership.

We help teams modernize software, integrate AI, and improve how they build and ship.

Led by Sean Lachenberg, a Georgia Tech CS alumnus with experience delivering autonomous systems, leading virtual-care engineering, and providing executive technology advisory. Meet the founder →

WAYS TO ENGAGE

01 Consulting 02 Advisory 03 Fractional leadership AI Workflow Diagnostic

LIMITED ENGAGEMENTS AVAILABLE NOW

Engagements

Consulting · Advisory · Fractional

Scope

Architecture to delivery

Led by

Sean Lachenberg

Availability

Limited, open now

ARCHITECTURE MODERNIZATION AI INTEGRATION FULL-STACK DELIVERY ENGINEERING PRACTICE FRACTIONAL LEADERSHIP CLEAR ACCOUNTABILITY NO HYPE ARCHITECTURE MODERNIZATION AI INTEGRATION FULL-STACK DELIVERY ENGINEERING PRACTICE FRACTIONAL LEADERSHIP CLEAR ACCOUNTABILITY NO HYPE

§02 · SERVICES

Three ways to work together.

Modern-Day Engineering means helping teams adapt how they build software, not just which tools they use.

Consulting

Scoped project work with a clear deliverable: architecture reviews, modernization plans, AI integration, and hands-on builds.

Advisory

A senior sounding board for executives and engineering leads on technology strategy, operating models, and high-stakes decisions.

Fractional leadership

Part-time technical leadership for teams between hires or growing past their current structure: direction, delivery, and engineering practice.

§03 · WHERE TEAMS BRING US IN

Problems worth a senior second set of hands.

✓ A platform or architecture that has outgrown the team
✓ A legacy system that needs a realistic modernization path
✓ AI adoption that needs structure, review, and clear ownership

✓ Delivery that is slow, unpredictable, or hard to see into
✓ A technical leadership gap between hires
✓ A decision that needs an experienced, independent view

§04 · AI WORKFLOW DIAGNOSTIC

Not sure where AI fits? Start with one workflow.

A short, fixed-scope diagnostic of a single workflow. You get a written read on where AI can genuinely help, what has to be true first, and the recommended next step, including “not yet” when that is the honest answer.

Explore the diagnostic→ AI strategic advisory→

SAMPLE · READINESS SIGNAL v1.2 · LIVE

Workflow clarity READY · 74

Data posture PREPARE · 52

Decision loop READY · 81

Sponsorship READY · 68

Operational slack PREPARE · 41

AGGREGATE 63 · READY TO PREPARE

§05 · HOW IT WORKS

Start small. Decide with evidence.

STEP 01

A short conversation

Twenty-five minutes on what your team needs, and whether we are a fit.

STEP 02

A scoped proposal

A defined initiative, a responsible owner, and agreed deliverables, whether advisory, implementation, or continuing fractional leadership.

STEP 03

Founder-led work

Sean does the work directly, with written findings and clear decision points along the way.

§06 · FOUNDER

Founder-led by Sean Lachenberg.

Sean has spent several years leading development teams in regulated industries, from autonomous measurement systems in air-gapped environments at U.S. defense facilities to patient-facing technology supporting 24/7 virtual care at OncoHealth’s Iris. Through OneSun, he has delivered executive technology advisory on modernization, engineering operations, and AI infrastructure.

He also builds agentic infrastructure at LockN. Engagements are scoped to your team’s needs; adopting LockN is not a prerequisite.

Meet the founder→

Bring a defined initiative.

What architecture or delivery problem does your team need to resolve next quarter? Limited engagements available now.