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Jonathan Henderson Email & Phone Number

Karate Instructor at GMR Marketing
Location: Hyattsville, Maryland, United States 11 work roles 6 schools
1 work email found @kaizenkarate.net 1 phone found area 301 LinkedIn matched
✓ Verified Jun 2026 4 data sources Profile completeness 100%

Contact Signals · 1 work email · 1 phone

Work email j****@kaizenkarate.net
Direct phone (301) ***-****
LinkedIn Profile matched
3 free lookups remaining · No credit card
Current company
Role
Karate Instructor
Location
Hyattsville, Maryland, United States
Company size

Who is Jonathan Henderson? Overview

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Quick answer

Jonathan Henderson is listed as Karate Instructor at GMR Marketing, a company with 1719 employees, based in Hyattsville, Maryland, United States. AeroLeads shows a work email signal at kaizenkarate.net, phone signal with area code 301, and a matched LinkedIn profile for Jonathan Henderson.

Jonathan Henderson previously worked as Karate Instructor at Kaizen Karate and Brand Ambassador at Gmr Marketing. Jonathan Henderson holds Professional Counseling Psychology from Washington Adventist University.

Company email context

Email format at GMR Marketing

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{first}@kaizenkarate.net
86% confidence

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

Profile bio

About Jonathan Henderson

Working with at-risk youth, submitting monthly reports, campus security at UMCP and Fannie MaeSpecialties: database administration, police, safety, telephone skills, martial arts, at-risk youth, reports

Listed skills include Public Speaking, Teaching, Community Outreach, Training, and 44 others.

Current workplace

Jonathan Henderson's current company

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

GMR Marketing
Gmr Marketing
Karate Instructor
new berlin, wisconsin, united states
Employees
1719
AeroLeads page
11 roles

Jonathan Henderson work experience

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

Karate Instructor

Current
Kaizen Karate

Instruct students of all ages and levels, and demonstrate and teach self-defense techniquesEvaluate, recommend, and examine students for testing and belt promotionMentor and counsel students

Jul 2015 - Present

Brand Ambassador

Washington D.C. Metro Area

I am a marketing specialist and, for all intents and purposes, a promotional hypeman for the client's products.

Case Management Specialist

Upper Marlboro And Largo, MD

Duties include enforcing the probation of juvenile delinquents, linking delinquents and their families to appropriate resources.

Jun 2010 - May 2015

Martial Arts Instructor

King Tiger Martial Arts

Instruct students of all ages and levels, and demonstrate and teach self-defense techniquesEvaluate, recommend, and examine students for testing and belt promotionMentor and counsel students

Jun 2005 - Jul 2012

Special Police Officer

Xecutive Security Investigations Group, Inc.

Fannie Mae Foundation, Washington D.C. Metro Area

Duties included greeting executives with a professional greeting, responding to emergencies when needed, several rounds of roving the inside and outside of the buildings.

Sep 2009 - May 2010

Security Officer

Blackhawk, Inc.

Conduct unarmed foot patrol (interior and/or exterior) and compose reportsControl access and egress via CCTV monitoring and alarm systemsDeter criminal activity and misconduct

Jul 2009 - Sep 2009

Choice Community Service-Learning Fellow

Umbc-The Choice Program
  • Provide case management for juveniles on probation.
  • Complete individual service plans with Supervisor and Choice Fellow team.
  • Provide intensive tracking services by visiting youth at home, in school, and within the community on a daily basis.
  • Provide advocacy in the areas of health, education, vocation, legal, and family intervention.
  • Complete required documentation in accordance with Choice format and timetables for Maryland Department of Juvenile Services.
May 2008 - May 2009

Law Enforcement Apprentice Program Intern

--Receive specialized training to foster interest in public safety.--Citizen assistance with vehicles, tickets, and telephone calls.--Entered traffic violations, equipment repair orders, and written warrnings into computer databases

Aug 2007 - Feb 2008

Police Aide

  • Provided security services for football, basketball, and concert crowds at University of Maryland.
  • Inspected and secured areas such as the Stamp Student Union, the Clarice Smith Performing Arts Center, and Tawes Theater.
  • Performed security and related tasks, patrolled the campus on foot and bicycle, provided walking escorts, worked as contract security, and directed traffic and crowd control at special events.
Jun 2005 - Aug 2007

Student Police Aide

University Of Maryland Police Department
Jun 2005 - Aug 2007

Martial Arts Instructor

Karate Learning Center

I taught Tae Kwon Do to all levels, from children to adults. I was responsible for transporting children from their school to the facility and I helped the students with their homework at the appropriate time.

May 2003 - Jun 2005
Team & coworkers

Colleagues at GMR Marketing

Other employees you can reach at gmrmarketing.com. View company contacts for 1719 employees →

6 education records

Jonathan Henderson education

Professional Counseling Psychology

Activities and Societies: 2010 Inductee of Psi ChiI took some courses in Counseling Psychology

Bachelor Of Arts, Criminology And Criminal Justice

University Of Maryland - College Park

Activities and Societies: Too many.My major was Criminology and Criminal Justice.

Bachelor Of Arts, Criminology And Criminal Justice

University Of Maryland - College Park

Activities and Societies: Too many.

Bachelor Of Arts (Ba), Criminal Justice And Corrections

University Of Maryland College Park

Activities and Societies: Too many.

Criminal Justice

Anne Arundel Community College

Activities and Societies: Moonlight TroupersI took all of my freshman and half of my sophomore classes at AACC. I tailored all of my.

High School Diploma. You Kinda Need That To Get To College.

The Harbour School In Annapolis

Activities and Societies: Drama club. Some sports. The only sport I really liked was lacrosse. However, it didn't last long.Attended THS.

FAQ

Frequently asked questions about Jonathan Henderson

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

What company does Jonathan Henderson work for?

Jonathan Henderson works for GMR Marketing.

What is Jonathan Henderson's role at GMR Marketing?

Jonathan Henderson is listed as Karate Instructor at GMR Marketing.

What is Jonathan Henderson's email address?

AeroLeads has found 1 work email signal at @kaizenkarate.net for Jonathan Henderson at GMR Marketing.

What is Jonathan Henderson's phone number?

AeroLeads has found 1 phone signal(s) with area code 301 for Jonathan Henderson at GMR Marketing.

Where is Jonathan Henderson based?

Jonathan Henderson is based in Hyattsville, Maryland, United States while working with GMR Marketing.

What companies has Jonathan Henderson worked for?

Jonathan Henderson has worked for Kaizen Karate, Gmr Marketing, Maryland Department Of Juvenile Services, King Tiger Martial Arts, and Xecutive Security Investigations Group, Inc..

Who are Jonathan Henderson's colleagues at GMR Marketing?

Jonathan Henderson's colleagues at GMR Marketing include Mushad Moore, Amanda Tarantino, Paul Elmore, Russell Houghtaling, and Russell Howard.

How can I contact Jonathan Henderson?

You can use AeroLeads to view verified contact signals for Jonathan Henderson at GMR Marketing, including work email, phone, and LinkedIn data when available.

What schools did Jonathan Henderson attend?

Jonathan Henderson holds Professional Counseling Psychology from Washington Adventist University.

What skills is Jonathan Henderson known for?

Jonathan Henderson is listed with skills including Public Speaking, Teaching, Community Outreach, Training, Case Managment, Program Development, Enforcement, and Policy.

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