John Casterline
AeroLeads people directory · profile

John Casterline Email & Phone Number

General Counsel at Global Guardian
Location: Fairfax, Virginia, United States 6 work roles 2 schools
LinkedIn matched
✓ Verified August 2026 3 data sources Profile completeness 86%

Contact Signals

LinkedIn Profile matched
3 free lookups remaining · No credit card
Current company
Role
General Counsel
Location
Fairfax, Virginia, United States
Company size

Who is John Casterline? Overview

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

Quick answer

John Casterline is listed as General Counsel at Global Guardian, a with 54 employees, based in Fairfax, Virginia, United States. AeroLeads shows a matched LinkedIn profile for John Casterline.

John Casterline previously worked as General Counsel at Arch Amenities Group and Solo Practitioner at Law Office Of John Casterline Esq.. John Casterline holds J.D. from University Of Virginia School Of Law.

Company email context

Email format at Global Guardian

This section adds company-level context without repeating John Casterline's masked contact details.

Global Guardian

Review company-level records connected to John Casterline before choosing the right outreach path.

Profile bio

About John Casterline

Entrepreneurial and effective senior legal executive with over 17 years of experience advising leaders and departments on a wide array of strategic business, operational, compliance, risk management, finance, and employment matters. Expertise in contract drafting and negotiation, contract management, strategic planning, post-acquisition integrations, compliance, and employment law. Leverages experience to resolve complex operational issues efficiently and improve processes. General Counsel to Global Guardian, a provider of world-class security solutions, custom-tailored to the individual needs of its global client base. Global Guardian offers an integrated suite of best-in-class security services that help clients identify and mitigate the risks of traveling and doing business both overseas and domestically.Prior to Global Guardian, served as General Counsel to Arch Amenities Group (formerly WTS International), a worldwide amenity management firm serving the hospitality, spa, fitness, commercial real estate, and recreation industries. Responsible for all legal affairs of the company, including contracts, litigation, regulatory compliance, employment, insurance, and intellectual property. Prior to joining AAG, operated as a solo practitioner in Virginia. Areas of former representation included small business formation and governance, civil litigation, non-profit law counsel, criminal defense (felony and misdemeanor), and estate planning. Formerly an Associate at Three Bridges Law, a general practice law firm. Areas of expertise included small business establishment, development and ongoing counsel; legislative and regulatory research and counsel; estate planning; non-profit formation; and Congressional advocacy.Admitted to practice in Virginia. Member, Virginia State Bar.

Current workplace

John Casterline's current company

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

Global Guardian
Global Guardian
General Counsel
mclean, virginia, united states
Employees
54
AeroLeads page
6 roles

John Casterline work experience

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

General Counsel

Current

Senior legal executive working cross-functionally with teams across business development, operations, finance and accounting, marketing, and human resources.

Dec 2023 - Present

General Counsel

Rockville, Md

Commercial contracts: authored and negotiated the entirety of AAG’s contract portfolio. Developed new contract types as service offerings diversified. Contract experience includes management and consulting agreements, licensing agreements, commercial leases, settlements, and facility operations documents (vendor contracts, waivers and releases, membership agreements).Contract management: Implemented AAG’s first-ever contract lifecycle management system to enable searching, sorting, and reporting on over 700 contracts. Established template contract intake platform to enable BD to generate compliant contracts, streamlining the process of drafting and review.Acquisitions: prepared company for, and ushered it through, its 2019 acquisition by private equity. Developed and implemented company-wide systems and strategies to effectively and rapidly integrate acquired companies.Employment law: led the Human Resources department for six years. Authored and enforced employment policies with decision-making oversight of a workforce of 4,500+ employees nationwide. Managed all employment practices litigation, and reduced claims through new protocols and manager training.Risk management: administered all claims from intake to processing to closure. Developed, implemented and trained on new initiatives and policies that reduced the number of GL and WC claims. Regulatory compliance: ensured ongoing compliance with new and evolving laws and regulations. Managed 600+ facility licenses. Litigation: provided counsel on potential and ongoing litigation. Coordinated and collaborated with outside counsel and negotiated with opposing counsel. Reduced risk exposure through effective contract drafting in areas of liability and indemnification.

Dec 2015 - Nov 2023

Solo Practitioner

Law Office Of John Casterline Esq.

Fairfax, Va

Corporate counsel: corporate formation; ongoing governance; drafting and reviewing contracts, non-disclosure agreements, teaming agreements, agency contracts; intellectual property protection; stock issuance and securities law counsel; employment lawSubject-matter legal and policy briefing: oral and written executive-level summaries and advice on diverse, esoteric client issuesNon-profit law counsel: preparing 501(c)(3) applications; authoring bylaws, Codes of Ethics, and Conflicts of Interest Policies; ongoing compliance with applicable non-profit regulations; dissolution and winding-upEstate planning: last wills and testaments, living wills, durable powers of attorney, trustsCriminal law: felony and misdemeanor defense

Jan 2014 - Dec 2015

Associate

Three Bridges Law

Washington, Dc

General practice law firm. Areas of experience include corporate formation and governance, small business counsel, estate planning, non-profit formation, and federal acquisition and contracting. Provides legal research and support to Three Bridges Advisors (lobbying counterpart to Three Bridges Law) in furtherance of client advocacy in legislative and regulatory matters.Responsibilities included:Small business creation, development and legal counsel501(c)(3) non-profit corporation formation and governanceCorporate governance: drafting of employment agreements, non-disclosure agreements, corporate bylaws, shareholder agreements, patent assignments, waivers of liabilityGeneral estate planning: last wills and testaments, living wills, durable powers of attorney, trust declarationsFederal Acquisition Regulation research and counselConflict Screening for Department of Defense SETA ContractorsBroad subject-matter legislative research and advocacy at local, state and federal levelsCompliance with federal lobbying registration and reporting requirements

Apr 2011 - Jan 2014

Senior Analyst, State Licensing And Regulatory Affairs

Licensing and regulatory specialist responsible for ensuring continued compliance with 50 state money transmission regulatory agencies. Responsibilities included:Business license application and renewal preparation and assemblyLegal research of relevant state law to ensure continued compliancePreparation and oversight of on and off-site regulatory auditsVetting of new company officers and directorsTimely filing of notices of company material changes to regulators (including address and name changes)Assisting General Counsel in legal research, document review, and the drafting and editing of client contracts, Terms and Conditions, and termination notices.

Jan 2008 - Nov 2010

Legal Intern

Law school summer internship. Responsibilities included:Conducting extensive legal research on a variety of criminal law topicsDrafting numerous Government responses to suppression, severance, and jury trial motions Assisting Special U.S. Attorneys in court during both jury and non-jury trials

May 2006 - Aug 2006
Team & coworkers

Colleagues at Global Guardian

Other employees you can reach at globalguardian.com. View company contacts for 54 employees →

2 education records

John Casterline education

B.A., Philosophy, Sociology

Activities and Societies: Phi Beta KappaMagna Cum Laude

FAQ

Frequently asked questions about John Casterline

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

What company does John Casterline work for?

John Casterline works for Global Guardian.

What is John Casterline's role at Global Guardian?

John Casterline is listed as General Counsel at Global Guardian.

Where is John Casterline based?

John Casterline is based in Fairfax, Virginia, United States while working with Global Guardian.

What companies has John Casterline worked for?

John Casterline has worked for Global Guardian, Arch Amenities Group, Law Office Of John Casterline Esq., Three Bridges Law, and Travelex Global Business Payments, Inc..

Who are John Casterline's colleagues at Global Guardian?

John Casterline's colleagues at Global Guardian include Vasyl Vashchuk, Samir H., Tressa Kemp, Quentin Holmes, and William Best.

How can I contact John Casterline?

You can use AeroLeads to view verified contact signals for John Casterline at Global Guardian, including work email, phone, and LinkedIn data when available.

What schools did John Casterline attend?

John Casterline holds J.D. from University Of Virginia School Of Law.

Find 750M verified contacts

Search by job title, company, industry, location, and seniority. Export verified B2B contact data when you need it.

People with similar names

Check these profiles if this is not the John Casterline you were looking for.

View similar profiles