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Brian Duff Email & Phone Number

IT Network Support Tier3 at RSI - Renaissance Systems, Inc.

Location: United States, United States, United States 9 work roles 2 schools

1 work email found @sempervalens.com 3 phones found area 254 and 703 LinkedIn matched

✓ Verified May 2026 4 data sources Profile completeness 100%

Current company

RSI - Renaissance Systems, Inc.

Role

IT Network Support Tier3

Location

United States, United States, United States

Company size

37 employees

Who is Brian Duff? Overview

A concise factual answer block for searchers comparing this professional profile.

Quick answer

Brian Duff is listed as IT Network Support Tier3 at RSI - Renaissance Systems, Inc., a company with 37 employees, based in United States, United States, United States. AeroLeads shows a work email signal at sempervalens.com, phone signal with area code 254, 703, and a matched LinkedIn profile for Brian Duff.

Brian Duff previously worked as Sr. TGS FSR at Semper Valens Solutions and Sr. DCGS-A FSR at Semper Valens Solutions. Brian Duff holds Current Student, Computer And Information Sciences And Support Services, 3.86 from Central Texas College.

Company email context

Email format at RSI - Renaissance Systems, Inc.

This section adds company-level context without repeating Brian Duff's masked contact details.

{first_initial}{last}@sempervalens.com

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AeroLeads found 1 current-domain work email signal for Brian Duff. Compare company email patterns before reaching out.

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Profile bio

About Brian Duff

Mr. Duff has 1-year experience as a CECOM IEW LAR (Communication and Electronics Command Intelligence & Electronic Warfare Logistics Assistance Representative, and 12 years of experience as a System and Network Administrator on military intelligence systems including Dell Servers, Client laptops, and performing all Information Assurance IAVA’s and hotfixes. Setup and managed the active directory for Distributive Common Ground Station – Army (DCGS-A) on NIPR, SIPR, and Coalition networks. Served as Field Software Engineer (FSE) in Support of PM IS & A which includes DCGS-A, DCGS-A lite, Tactical Ground Station (TGS), and other intelligence systems. 7 years of experience as a Sr. Field Software Engineer, Systems Administrator. 27 years of experience as a military intelligence (MI) and missile electronic equipment technician, with more than 15 years in repair shop operations and supervisory roles. Served as network and system administrator over MI systems, all Windows, Linux, and Solaris-based administration. Served as Chief Information Assurance technician to update and patch all systems to bring them into compliance with the Department of Defense standards. Performed in a capacity as a quality control inspector, monitoring and verifying repairs to computer systems, electronics, fiber optic cable repair, and use of specialized test equipment. Experienced with MS Word, Excel, PowerPoint, Outlook, and the internet for research; type 40wpm. Recognized by senior managers on numerous occasions for exceptional job performance. Continuing education towards completion of B.S.CIS. MS Office Professional, System & Network Admin, Linux & UNIX, COMSEC Custodian, Windows OS & Solaris, IBM Blade Servers, NetApp Storage, Enterprise Servers, Advanced Electronic Troubleshooting. Top Secret – SCI Security Clearance /w CI Polygraph.

Listed skills include Windows 7, Intelligence, Solaris, Information Technology, and 22 others.

Current workplace

Brian Duff's current company

Company context helps verify the profile and gives searchers a useful next step.

Rsi - Renaissance Systems, Inc.

IT Network Support Tier3

Salado, TX, US

Website

rsitex.com

Employees

37

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Company profile

View company profile Email format

9 roles

Brian Duff work experience

A career timeline built from the work history available for this profile.

It Network Support Tier3

Rsi - Renaissance Systems, Inc.

Salado, TX, US

Sr. Tgs Fsr

Current

Semper Valens Solutions

Fort Hood And Kuwait

May 2022 - Present

Sr. Dcgs-A Fsr

Current

Semper Valens Solutions

May 2022 - Present

Iew Lar

Cecom Ilsc

Fort Hood, Texas, United States

Mr. Duff serves as the IEW MT Equipment Specialist with the responsibility to develop and implement the Technical Assistance plan for the Sensor family of systems throughout their lifecycle. Serve as the commodity command’s Technical Subject Matter Expert and focal point for technical assistance for IEW systems such as but not limited to, the.

Jul 2021 - May 2022

Dcgs-A Fse/ It System Specialist

Tobyhanna Army Depot

Mr. Duff serves as a Distributive Common Ground Station-Army (DCGS-A) Field Software Engineer (FSE) for the Program Manager (PM) Program of Record (POR) systems for the US Army. Roles include providing customer field support services, including software baseline installation, configuration, troubleshooting, customer assistance, and/or technical assistance.

Mar 2016 - Jul 2021

System Administrator/Fsse

General Dynamics Information Technology

Fort Hood, Texas

Mr. Duff serves as the System Administrator across 4 different networks including NSANET, SIPR, NIPR, and JWICS. Roles also include maintenance of the network to include the Domain Controllers, Active Directory account maintenance and account creation, and the network configuration for Windows Thin clients, Windows clients, Windows Servers, Solaris, and.

Jun 2014 - Mar 2016

Sr. Field Software Engineer

Engility Corporation

Fort Hood, Texas

Mr. Duff’s position includes on-site and telephonic software support services on Windows clients, Windows Servers, Solaris, and Linux-based systems supporting database, video, mapping software, and web-based utilities. Network and System Administrator on specific systems. Guardrail-specific software and the Operation Ground Station (OGS). DCGS-A 3.1.7.3.

Jan 2011 - Jun 2014

Military Intelligence

Us Army

Senior Technical Maintenance Chief working on the Guardrail Aircraft and the GGB system.

Apr 2005 - Feb 2011

Sr. Maintenance Tech

Us Army

Maintained and repaired the Land Combat Support system, supporting the Lance, Tow and Dragon missile systems. I also supported and maintained the Patriot Missile System and ran the IFF, (Interrogate Friend or Foe), system maintenance section.

Jan 1991 - Apr 2005

Team & coworkers

Colleagues at RSI - Renaissance Systems, Inc.

Other employees you can reach at rsitex.com. View company contacts for 37 employees →

MH

Manuel Hernandez Colleague at Rsi - Renaissance Systems, Inc. Corsicana, Texas, United States, United States View → SC

Sarah Cheatham Colleague at Rsi - Renaissance Systems, Inc. Austin, Texas, United States, United States View → MP

Mamani Patar Colleague at Rsi - Renaissance Systems, Inc. Mumbai, Maharashtra, India, India View → GR

Gerardo Rivera Colleague at Rsi - Renaissance Systems, Inc. Austin, Texas, United States, United States View → KA

Kayla Aparicio Colleague at Rsi - Renaissance Systems, Inc. Covington, Louisiana, United States, United States View → MB

Marissa B. Colleague at Rsi - Renaissance Systems, Inc. Groesbeck, Texas, United States, United States View → NB

Nicki Burgeson Colleague at Rsi - Renaissance Systems, Inc. United States, United States View → JM

Joe Mcnutt Colleague at Rsi - Renaissance Systems, Inc. Groesbeck, Texas, United States, United States View → VA

Vincent Ayn De Castro Colleague at Rsi - Renaissance Systems, Inc. Austin, Texas, United States, United States View → JD

Jackie Deaton Colleague at Rsi - Renaissance Systems, Inc. Austin, Texas Metropolitan Area, United States View →

2 education records

Brian Duff education

Current Student, Computer And Information Sciences And Support Services, 3.86

Central Texas College

Activities and Societies: Psi BetaCompleted Associates Degree in Applied Sciences emphasis in Computer Information Systems , Management.

New Student, Information Technology

Cochise College

Activities and Societies: Was a student while in AIT.Electronics and Computer electronics.

FAQ

Frequently asked questions about Brian Duff

Quick answers generated from the profile data available on this page.

What company does Brian Duff work for?

Brian Duff works for RSI - Renaissance Systems, Inc..

What is Brian Duff's role at RSI - Renaissance Systems, Inc.?

Brian Duff is listed as IT Network Support Tier3 at RSI - Renaissance Systems, Inc..

What is Brian Duff's email address?

AeroLeads has found 1 work email signal at @sempervalens.com for Brian Duff at RSI - Renaissance Systems, Inc..

What is Brian Duff's phone number?

AeroLeads has found 3 phone signal(s) with area code 254, 703 for Brian Duff at RSI - Renaissance Systems, Inc..

Where is Brian Duff based?

Brian Duff is based in United States, United States, United States while working with RSI - Renaissance Systems, Inc..

What companies has Brian Duff worked for?

Brian Duff has worked for Rsi - Renaissance Systems, Inc., Semper Valens Solutions, Cecom Ilsc, Tobyhanna Army Depot, and General Dynamics Information Technology.

Who are Brian Duff's colleagues at RSI - Renaissance Systems, Inc.?

Brian Duff's colleagues at RSI - Renaissance Systems, Inc. include Manuel Hernandez, Sarah Cheatham, Mamani Patar, Gerardo Rivera, and Kayla Aparicio.

How can I contact Brian Duff?

You can use AeroLeads to view verified contact signals for Brian Duff at RSI - Renaissance Systems, Inc., including work email, phone, and LinkedIn data when available.

What schools did Brian Duff attend?

Brian Duff holds Current Student, Computer And Information Sciences And Support Services, 3.86 from Central Texas College.

What skills is Brian Duff known for?

Brian Duff is listed with skills including Windows 7, Intelligence, Solaris, Information Technology, Army, Linux, Network Administration, and System Administration.

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