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Javier DortaJD
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Javier Dorta

@javierdorta

IT Support Specialist at Marietta Click IT investigating a Microsoft 365 session-token theft attack and running security assessments.

United States
Message

At Marietta Click IT, I support business clients with Microsoft 365, SharePoint, and Teams, along with Windows Server and network infrastructure.

I led an investigation into a business email compromise affecting an automotive production client. I traced the incident to an adversary-in-the-middle attack that stole an authenticated session token and recommended a conditional access change to close the gap.

I run an ongoing monthly security assessment and penetration testing program for a business client, using Burp Suite and direct system enumeration. I track findings through a retest verification matrix and deliver prioritized remediation recommendations.

Alongside my work, I maintain a Proxmox home lab with Kali Linux and practice offensive security techniques. I’m also building a Windows Server environment for Active Directory attack and defense practice while working toward CompTIA Security+ and PNPT certifications.

Experience

Work history, roles, and key accomplishments

SE
Current

Independent IT & Security Consultant

Self-Employed

Jan 2026 - Present (9 months)

Provides IT support and security services to small business clients, including law firms, dental offices, and production companies, covering network security, computer maintenance, and Microsoft 365 support.

MI
Current

IT Hardware Technician / IT Support Specialist

Marietta Click IT

Nov 2024 - Present (1 year 11 months)

Supports Microsoft 365, SharePoint, and Teams for business clients; administers Windows Server, Active Directory, DNS, DHCP, and Hyper-V. Led a business email compromise investigation and runs an ongoing internal security assessment and penetration testing program.

NS

Agricultural Construction Technician

North Texas Feeding Systems

Aug 2022 - Nov 2024 (2 years 3 months)

Assessed farm machinery for safety and efficiency and managed storage system builds from assessment through completion for agricultural clients.

JL

Assistant Manager

Jiffy Lube (Premium Velocity LLC)

Feb 2022 - Jul 2022 (5 months)

Supervised daily operations, staff scheduling, and workflow coordination while coaching the team on service procedures, customer engagement, and revenue targets.

EC

Assistant Manager / Service Technician

Express Oil & Service Center

Apr 2016 - Feb 2022 (5 years 10 months)

Managed front-line operations across two locations for six years; trained staff and built lasting customer relationships through clear technical communication.

TG

Refrigeration & HVAC Apprentice

The PKI Group

Apr 2019 - Feb 2020 (10 months)

Assisted with commercial refrigeration system installation, including piping, soldering, pressure testing, and drain line construction under certified technician supervision.

UG

Wheeled Vehicle Mechanic (91B), PFC

U.S. Army National Guard

Jan 2013 - Nov 2018 (5 years 10 months)

Maintained and repaired military wheeled vehicles under mission-critical, high-accountability conditions, developing disciplined problem-solving and operational reliability.

MN

General Service Technician

Merchants Tire & Auto / NTB

Feb 2014 - Feb 2016 (2 years)

Performed vehicle maintenance services, managed incoming parts inventory, and supported sales representatives in customer-facing roles.

Education

Degrees, certifications, and relevant coursework

UA

U.S. Army National Guard Youth Challenge Academy

GED, General Education

Earned a GED from the U.S. Army National Guard Youth Challenge Academy in Fort Gordon, GA in 2012.

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