user avatar

John Marshall Piper

Advisor at Great Diamond Partners, LLC — Portland, ME

Updated today

Credentials

Series 63, Series 65

Experience

18 years

Location

Portland, ME 04101

Great Diamond Partners, LLC logo

Great Diamond Partners, LLC

Team

Total advisors

8

Across 2 offices

Clients per advisor

65 High

Avg AUM per client

$1,510,084 High

HNW client ratio

54% High

About

John Piper is a financial advisor at Great Diamond Partners, LLC in Portland, ME, with 18 years of industry experience. He holds the Series 63 and Series 65 designations and previously worked at UBS Financial Services and Purshe Kaplan Sterling Investments. Outside of his advisory role, he provides fixed insurance advice to clients as a registered representative. Great Diamond Partners serves individuals, pension and profit-sharing plans, charitable organizations, and closely held businesses with discretionary portfolio management, financial planning, business transition planning, and fee-based insurance solutions. The firm uses a variety of investment strategies and third-party platforms to tailor client portfolios and offers stand-alone or bundled financial planning and business transition services.

Client services

Based on Great Diamond Partners, LLC

Financial planning Portfolio management Business transition planning

Expertise

Based on Great Diamond Partners, LLC

Annuities Business exit / sale strategy Concentrated stock management Wealth management

Occupation focus

Based on Great Diamond Partners, LLC

Founder/Business Owner

Not sure if this advisor is right for you?

Answer a few questions to see advisors matched to you.

Fee options

Fixed

Financial planning flat fees up to $25,000 (negotiable); business transition fixed fees range from $10,000 to $50,000

Percentage

$0 - $1,000,000: 1.20% annually $1,000,001 - $5,000,000: 0.90% annually $5,000,001 - $10,000,000: 0.70% annually $10,000,001 - $25,000,000: 0.60% annually Over $25,000,000+: 0.50% annually

Commissions

Insurance commissions paid separately to licensed insurance agents affiliated with the firm, separate from advisory fees

Project-based

Financial planning services at $300/hour; single subject financial planning/general consulting at $300/hour; business transition planning at $350/hour

Other

Account minimum: $5,000 minimum annual fee for portfolio management services (may be waived at discretion; no specific asset minimum clearly stated) Minimum fee: Minimum annual fee of $5,000 for portfolio management services; may be waived at discretion Fee-only: Portfolio management services, financial planning and consulting offered on fee-only basis; hourly financial planning at $300/hour; flat fees up to $25,000 for financial planning; business transition hourly fee $350/hour or fixed fee $10,000 to $50,000

Location

See office

Portland, ME

22 Monument Square, Suite 300

Portland ME 04101

Advisors at this office

7

Most active in

Maine · Texas

Work history

18 years of industry experience

Great Diamond Partners Llc

2019 - Present • 7 years

Portalnd, ME

Purshe Kaplan Sterling Investments

2019 - 2019 • 1 year

Albany, NY

UBS Financial Services

2015 - 2019 • 4 years

Portland, ME

Disclosures

Exclamation point means they have disclosures of this type. Check mark means no disclosures of this type were found.

Business activities & affiliations

user avatar

Mary R

PFS™, Series 65

Scarborough, ME

Kirkwood Private, LLC

Mary Rodrigue is a PFS™ credentialed financial advisor with 31 years of industry experience. She has been with Kirkwood Private, LLC since 2006, where she is the firm's sole advisor. Kirkwood Private serves a limited number of high-net-worth individuals, families, related trusts, and private charitable foundations, providing comprehensive wealth management that integrates investment oversight with tax, estate, retirement, and trust planning. The firm operates primarily on a non-discretionary basis, emphasizing asset-class diversification and coordinating third-party managers to implement investment decisions.

Wealth management Charitable giving & philanthropy
user avatar

Thomas R

CFA®, Series 63, Series 65

Portland, ME

Harbor Investment Advisors

Thomas Repeta is the sole advisor at Harbor Investment Advisors in Portland, ME, holding the CFA® designation along with Series 63 and Series 65 licenses. He has 22 years of industry experience and has been with Harbor Investment Advisors since 1998. Harbor Investment Advisors provides discretionary portfolio management primarily for individuals, trusts, and retirement plans, focusing on mutual funds, exchange-traded funds, and balanced allocations. The firm typically serves larger account sizes and combines top-down and bottom-up analysis using third-party research, managing accounts on a discretionary basis with regular reviews and detailed performance reporting.

Wealth management
user avatar

James K

Series 65

Portland, ME

Northwater Capital

James Kelly is a Series 65-licensed financial advisor at Northwater Capital with one year of industry experience. Prior to founding Northwater Capital, he worked for 17 years at Stein Mitchell Beato & Missner LLP. Northwater Capital provides investment management primarily to pooled investment vehicles and institutional-style clients, employing a tactical allocation strategy supported by proprietary algorithmic, machine learning, and AI models. The firm combines asset-based management for private funds with project-based hourly consulting services.

Active portfolio management Options & derivatives strategies Concentrated stock management Private / alternative investments
user avatar

Brian D

CFP®, CFA®, Series 63

Portland, ME

Portland Financial Planning Group

Brian Dietz is a CFP® and CFA® with 23 years of experience in financial advising. He has been with Portland Financial Planning Group since 1998. The firm provides comprehensive financial planning and investment advisory services to individuals and families, including high-net-worth clients. Portland Financial Planning Group emphasizes long-term, asset-allocation-driven portfolios using low-cost index funds and diversified mutual funds and ETFs, primarily managing client assets on a non-discretionary basis with client involvement in transactions.

Annuities
user avatar

Nicholas P

CFP®, Series 63, Series 66

Saco, ME

Parzych Financial Planning, LLC

Nicholas Parzych is a CFP® professional with 20 years of industry experience. He is the principal of Parzych Financial Planning, LLC and also operates Parzych Tax Services, LLC. Prior to founding his independent firm, he worked at Fidelity Investments for over 20 years. Parzych Financial Planning serves individuals, high-net-worth clients, trusts, estates, corporations, and other business entities, offering discretionary portfolio management, investment analysis, financial planning, and consulting. The firm employs a combination of technical, quantitative, fundamental, cyclical, and economic analysis in its investment process, and utilizes third-party managers and discretionary trading under limited power of attorney.

Active portfolio management Factor investing / smart beta
user avatar

John D

Series 63, Series 66

Yarmouth, ME

Intent Advice, Inc.

John Duffy is the sole advisor at Intent Advice, Inc. in Yarmouth, ME, holding Series 63 and Series 66 licenses with 27 years of industry experience. His prior roles include positions at Broad Cove Capital, Cribstone Capital Management, and Purshe Kaplan Sterling Investments. Intent Advice, Inc. provides consulting and investment-advisory services to a limited client base including high-net-worth individuals, small businesses, charities, endowments, trusts, and estates. The firm offers written financial plans and ongoing advice tailored to each client’s investment profile, typically reviewing clients quarterly, and operates with a fee structure based on negotiated fixed fees and hourly rates rather than assets under management.

General estate planning guidance Business succession planning Charitable giving & philanthropy Founder/Business Owner
Warmer team member

Not sure where to start?

We'll help you think it through—whether you ultimately need an advisor or not. Warmer helps you compare advisors clearly, so you can choose with confidence.

Find your advisor

For advisor listings, we rely on sources including public filings and data provided by advisors, and we cannot guarantee that all information is current or accurate. Advisors are independent and may not have reviewed or updated this information. Please review an advisor's Form ADV and do your own diligence before deciding whether to work with them.

Advisor matching and referrals are provided by FinanceHQ LLC ("FHQ"), a wholly-owned subsidiary of Warmer and an SEC-registered investment adviser. We may be compensated by participating advisors. You pay no fee to use our matching service, and advisor fees are not increased because of a referral. We do not supervise advisors, manage or hold assets, guarantee performance, or provide advice about specific investments.

By using our service, you agree to the Warmer Terms of Service and FHQ Advisory Agreement, and acknowledge Warmer's Privacy Policy. Please review FHQ's ADV Part 2A and Form CRS. Logos provided by Logo.dev

© 2026 Warmer Holdings Inc. ("Warmer")