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About the role

PGTEK is seeking a Senior High-Performance Computing (HPC) Systems Administrator with a TS/SCI clearance to manage a large-scale HPC cluster at Aberdeen Proving Ground, Maryland. You will own the HPC environment, ensuring reliability, performance, and security while maintaining compliance with customer requirements. You will mentor customer staff and coordinate upgrades, providing hands‑on training and knowledge transfer.

Before you apply

Applying takes about a minute. These four things decide how fast it moves after that.

Your profile is current

It's what we read first. Occupations, seniority and locations matter more than a long history.

Two examples you can talk through

Not a portfolio — just two pieces of work where you can explain the decisions and what you'd change.

A number in mind

What you're on now and what would make you move. We negotiate better when we know both.

Your notice period

Employers plan around it, and it's the question that stalls offers most often.

Once you apply, someone reads it and calls you before anything reaches the employer — usually within two working days.

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