Portfolio

Craig
Sheffield

Cybersecurity Analyst

Consultant & Educator

Technical Writing Editor

Project Manager

Audio Engineer & Editor

Cybersecurity-focused practitioner and technical writer who brings meticulous attention to detail to your documentation, policies, and security reviews — and a trained musician’s ear to your audio editing and copywriting needs. I help startups and small businesses secure systems, clarify technical processes, and produce polished content that connects with real people.

Contact Me

About Me

My story

I’m Craig — a freelance teacher, audio engineer, and cybersecurity technical writer based in Taiwan. I blend a decade of music education and performance experience with growing expertise in cybersecurity and computer science to help clients communicate clearly and protect their systems. My work ranges from editing cybersecurity training materials to cleaning and mixing audio, writing compelling copy, and producing user-friendly technical documentation.

I value clarity, reliability, and a practical approach: I translate complex ideas into usable guidance, whether that’s tightening up a company’s security practices or polishing a podcast episode. Outside of work I play squash and tennis, listen to podcasts, read science fiction, and attend concerts — all of which keep my creative and analytical skills sharp.

If you need concise, accurate technical writing, thoughtful security reviews, or professional audio and copy services, let’s talk.

You can read more about my history and other interests in my interview with SoundGym.

  • Residence: Taiwan
  • Freelance: Available
  • Pronoun: he/him

Experience

Work related
Present
Cybersecurity Technical Writing Editor

Edit and produce clear, accurate cybersecurity documentation—translating complex security concepts into practical, audience-specific guides and study material.

Present
Producer, Performer,
& Educator

Worked with dozens of artists and businesses as a producer, engineer, editor, manager, event planner, performer, and educator. Business website: Idea Field Productions

Present
ELL
Educator

Independent English teacher with over 11 year of experience teaching in the USA and Taiwan.

2018-Now
Artly World
Board Director

Adviser to the board for the greater Austin, Texas area's programs and initiatives related to the arts. Artly World

2017-2019
We Are South
Co-Executive Director

Initiated and organized two, annual multi-day music and arts festivals in Kaohsiung City, Taiwan that hosted 100s of artists from South East Asia. We Are South FB

Certifications & Education

include
2024
CompTIA
CySA+

CompTIA Cybersecurity Analyst cert is a vendor-neutral, intermediate-level certification that validates skills in threat detection, incident response, and vulnerability management. It focuses on using behavioral analytics, security tools (SIEM, EDR), and threat intelligence to identify and remediate security incidents, support ongoing monitoring, and improve an organization’s security posture. 

2024
CompTIA
Security+

CompTIA Security+ is a vendor-neutral, entry-to-intermediate cybersecurity certification that validates foundational skills in network security, risk management, access control, cryptography, and threat awareness. It covers practical, hands-on knowledge for identifying and mitigating common security issues, implementing secure network architectures, and applying best-practice policies and controls.

2025
LPIC-1

Linux Professional Institute Certification — Level 1 is a distribution-neutral certification that verifies Linux administration skills. It covers command-line operations, system architecture, package management, basic networking, user and file permissions, scripting, and essential services. 

2023
CS50x

Harvard’s CS50 on edX is an intensive introduction to computer science and programming. The course covers core concepts — algorithms, data structures, memory, abstraction, web development, and basic security — using languages like C, Python, SQL, and JavaScript. CS50x combines lectures, hands-on problem sets, and a final project to build practical coding skills and computational thinking. 

2019
Music Business
Specialization

Berklee College of Music through Coursera. 17 weeks of study that included: Music Business Foundations, Building Your Career in Music: Developing A Brand and Funding Your Music, Copyright Law in the Music Business, and Creativity And Entrepreneurship. Certificate

2017
Music Production
Specialization

Berklee College of Music through Coursera. 18 weeks of study that included: The Technology of Music Production, The Art of Music Production, Pro Tools Basics, and Music Production Capstone. Certificate

2002-2008
University of
North Texas

Bachelors of music with a focus in education. Included advanced theory, training in voice and all traditional instruments, plus solo and ensemble performance and accolades.

Skills

Technical | Creative | Soft
  • Threat Detection

    Spot malicious activity early using logs, alerts, and behavioral analytics.

    90%
  • Incident Response

    Triage, contain, and remediate breaches efficiently to limit impact.

    70%
  • Vulnerability Management

    Triage, contain, and remediate breaches efficiently to limit impact.

    80%
  • Security Automation

    Automate detection and response with scripts and playbooks for faster, consistent defense.

    85%
  • Teamwork &
    Collaboration

    Excellent communication, negotiation, and organizational skills in group environments.

    100%
  • Project Management

    Able to identify key elements and schedule an achievable plan while encouraging team members in a constraint work culture utilizing tools such as Jira, Milanote, Notion, and Slack/Discord.

    80%
  • Teaching

    Experienced organizing and creating structured material to assist and evaluate learners of both music and language.

    100%
  • Audio Engineering

    Familiar with various DAWs, microphones, recording techniques, digital converters, routing, and maintenance of audio equipment.

    75%
  • Copywriting

    Craft clear, persuasive, audience-focused text for websites, marketing materials, and training content that improves engagement and drives action.

    90%

Services

What I Do
Security Health Check

Quick onsite or remote check of patching, antivirus, password hygiene, Wi‑Fi/router, backups, and basic web/SSL.

Risk Assessments

Write concise risk reports mapping technical issues to business impact and recommended mitigations.

Vulnerability Scan

Automated OWASP ZAP/nikto scan, TLS and HTTP header review, CMS/plugin check, and trivial misconfiguration findings.

Project
Management

Manage and coordinate single client projects or small to medium size teams using a constraint hierarchy to allow for maximum flexibility and speed.

Secure Copywriting
& Editing

Produce persuasive, security-focused website copy, product descriptions, and marketing content.

Sound
Design

Make your content more impactful by  identifying the emotion behind the content and use music, sound design, and background sounds to set the mood.

Audio
Engineering

Live sound engineering, record engineering, mixing, and mastering.

Reviews

What people say
Jimmy Cimermancic
Jimmy Cimermancic
JD Candidate & Musician

I worked with Craig on a difficult six minute solo fingerstyle guitar piece that does not repeat. Throughout the process, Craig was easygoing and supportive, offering great ideas and being flexible and creative to meet my exacting standards. He was always positive throughout, and the finished product is clear, big and moving. I couldn't ask for more. Highly recommend.

Roslynn Lemmer
Roslynn Lemmer
Video editor &
Motion graphics designer

I have worked for, and collaborated with Craig on multiple projects... He expertly edited and re-designed the backing music, SFX, and recorded the voice-over in his studio. He has shown diligence, professionalism and creativity with all work. He is very easy to work with, quick to respond and has a remarkable ability to juggle and organize projects, events, marketing, and campaigning, mentoring, and client liaison with confidence and ease.

Billy Walsaw
Billy Walsaw
Musician

Craig is well organized, clear, and fast with the mixes! Thanks to his attention and creativity I have professional masters that I've been sharing more and more. I've learned a lot about the 'space' in mixing and how each instrument plays it part telling the story in the mix.

Portfolio

Latest works
GitHub documentation
Links
GitHub documentation
Sound Design & Engineering
Video
Sound Design & Engineering
Mixing & Mastering
Music
Mixing & Mastering
Logo Sound Design
Video
Logo Sound Design
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