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Dennis J. O'Connell Email & Phone Number
Co-Founder and Partner
at
Mercury Access Group
1 work email found
@mercuryaccess.com
12 phones found area 301, 202, 703, 201, 512, and 212
LinkedIn matched
✓ Verified Jun 2026
4 data sources
Profile completeness 100%
Current company
Role
Co-Founder and Partner
Location
Washington DC-Baltimore Area, United States, United States
Company size
Who is Dennis J. O'Connell? Overview
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Quick answer
Dennis J. O'Connell is listed as Co-Founder and Partner at Mercury Access Group, a company with 4 employees, based in Washington DC-Baltimore Area, United States, United States. AeroLeads shows a work email signal at mercuryaccess.com, phone signal with area code 301, 202, 703, 201, 512, 212, and a matched LinkedIn profile for Dennis J. O'Connell.
Dennis J. O'Connell previously worked as Co-Founder & Partner at Mercury Access Group and CFO at Ancillare. Dennis J. O'Connell holds Bachelor Of Science, Marketing from University Of Maryland - Robert H. Smith School Of Business.
Company email context
Email format at Mercury Access Group
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{first_initial}{last}@mercuryaccess.com
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AeroLeads found 1 current-domain work email signal for Dennis J. O'Connell. Compare company email patterns before reaching out.
Profile bio
About Dennis J. O'Connell
Dennis O'Connell successfully launched and scaled businesses for over 35 years in telecom, technology, and other industries, both as a senior executive and a venture capital firm partner. His career and related experience are a result of a hands-on approach ranging from start-up growth businesses to more mature enterprises spanning large metro footprints.Dennis is a Co-Founder and Partner of Mercury Access Group (www.mercuryaccess.com), a TMT management company providing executive management, consulting, investments, and financial advisory services for large professional investors. Mercury Access focuses on companies attempting to scale-up, companies amid a turnaround, and high growth companies with execution challenges.He was a senior operating executive at McCaw Cellular, AT&T Wireless, and XO Communications. Dennis was the CFO at Ancillare, a pharma services company supporting global clinical trials during the COVID pandemic. He was on the original management teams at both McCaw Cellular (acquired by AT&T) and XO Communications (acquired by Verizon). As a partner in a New York based venture capital firm, Dolphin Equity Partners, he was on the deal team for successful exits of portfolio companies such as TeraGo (IPO), Gomez (Compuware), Touch Commerce (Nuance) & Enpocket (Nokia).Dennis graduated from the Robert H. Smith School of Business at the University of Maryland, with a Bachelor of Science degree in Marketing.
Listed skills include Strategic Partnerships, Venture Capital, Start Ups, Investments, and 31 others.
Current workplace
Dennis J. O'Connell's current company
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Mercury Access Group
10 roles · 41 years
Dennis J. O'Connell work experience
A career timeline built from the work history available for this profile.
Co-Founder & Partner
Current
Mercury Access Group
Mercury Access Group brings together both entrepreneurs and investors like PE firms, family offices and companies to pursue opportunities in telecom, media & technology (TMT).
Jan 2023 - Present
Cfo
Ancillare provides procurement and logistics services for pharma and bio tech companies for global clinical research trials. As Ancillare’s CFO, completed three financings; solved a liquidity challenge; initiated the first annual audit and budget process, while the Company increased its annual revenues and its cash flow margins to record levels.
Mar 2020 - Sep 2022
Managing Director
Iq4
iQ4 is an enterprise-level software company with workforce development and workforce optimization platforms. Closed/created first U.S. virtual, cyber apprenticeship program w/T-MobileExpanded virtual cybersecurity internship program to a dozen universities and 3500 students to expose students to careers in cybersecurity. 25% of program graduates now.
Apr 2017 - Apr 2020
Managing Partner
4600 Norwich Group
Consulting and advising for multiple start-ups, distressed companies and rapidly growing companies, plus due diligence for M&A and financings.
Jan 2015 - Mar 2017
Partner
Dolphin Equity Partners-Communications Vc Firm
*Lead partner/deal team member on these five successful exits:Enpocket-acquired by NokiaGomez-acquired by CompuwareTeraGo Networks-IPO on the Toronto Stock ExchangeSixth Sense Media-acquired by Evolving SystemsTouch Commerce-acquired by Nuance
Apr 2001 - Dec 2014
Board Of Directors
Abovenet-National B2B Fiber Network Provider
The McCaw representative on the Board, as the Company successfully emerged from bankruptcy and led to a successful exit.
2003 - 2006
~3 yrs
Senior Vice President & North Region President
Xo Communications-National B2B Voice & Data Services Provider
*Built the region organically from a start-up to $200ml revenue stream in three years*Launched successfully new markets and networks in New York, Boston, Washington, and Philadelphia and later merged Chicago, Detroit, St. Louis and Cleveland/Columbus into the region
1998 - 2001
~3 yrs
Senior Vice President & Ne Region President
*Grew the New York wireless revenue stream from $500ml to $1bl in three years*Won the JD Powers Award for best local wireless service in New York and Pittsburgh in 1996 and 1997*Launched successfully new markets and networks in Boston, Washington/Baltimore and Philadelphia
1995 - 1998
~3 yrs
Vice President Of Operations-Ny Metro & Central Region
Mccaw Cellular-Largest Independent U.S. Wireless Carrier
*Member of the original McCaw Cellular management team.*Increased revenues in the New York Metro from $100ml to $500ml in three years*Led the start-up/launch of 5 markets in the Southwest and grew the region from a start-up to a $100ml business in six years
1985 - 1995
~10 yrs
1 education record
Dennis J. O'Connell education
-
University Of Maryland - Robert H. Smith School Of Business
FAQ
Frequently asked questions about Dennis J. O'Connell
Quick answers generated from the profile data available on this page.
What company does Dennis J. O'Connell work for?
Dennis J. O'Connell works for Mercury Access Group.
What is Dennis J. O'Connell's role at Mercury Access Group?
Dennis J. O'Connell is listed as Co-Founder and Partner at Mercury Access Group.
What is Dennis J. O'Connell's email address?
AeroLeads has found 1 work email signal at @mercuryaccess.com for Dennis J. O'Connell at Mercury Access Group.
What is Dennis J. O'Connell's phone number?
AeroLeads has found 12 phone signal(s) with area code 301, 202, 703, 201, 512, 212 for Dennis J. O'Connell at Mercury Access Group.
Where is Dennis J. O'Connell based?
Dennis J. O'Connell is based in Washington DC-Baltimore Area, United States, United States while working with Mercury Access Group.
What companies has Dennis J. O'Connell worked for?
Dennis J. O'Connell has worked for Mercury Access Group, Ancillare, Iq4, 4600 Norwich Group, and Dolphin Equity Partners-Communications Vc Firm.
How can I contact Dennis J. O'Connell?
You can use AeroLeads to view verified contact signals for Dennis J. O'Connell at Mercury Access Group, including work email, phone, and LinkedIn data when available.
What schools did Dennis J. O'Connell attend?
Dennis J. O'Connell holds Bachelor Of Science, Marketing from University Of Maryland - Robert H. Smith School Of Business.
What skills is Dennis J. O'Connell known for?
Dennis J. O'Connell is listed with skills including Strategic Partnerships, Venture Capital, Start Ups, Investments, Management, Business Strategy, B2B, and Product Management.
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