Greenhill Agency is a trusted outsourced partner specializing in business development, marketing, executive administration, operations, and lifestyle services. With more than two decades of experience, we partner with boutique investment firms, family offices, startups, and corporate marketing teams to deliver innovative, results-driven strategies that elevate brand presence, streamline operations, manage personal needs, and create exceptional experiences for discerning clients.
– C-suite caliber, shaped by 25+ years. At leading firms including Goldman Sachs, the NFL, Citigroup Private Bank, and in the service of HNW clients—deployed efficiently and flexibly by design.
– A robust network, built over decades. Deep relationships across financial services, private wealth, sports, entertainment, arts, hospitality, travel, and philanthropy—leveraged purposefully for you.
– Global fluency, rooted in experience. New York, London, Hong Kong, 40+ countries. Genuine cross-cultural intelligence throughout.
– Absolute discretion guaranteed. Your priorities, relationships, and information remain strictly confidential.
Greenhill delivers hands-on senior leadership across marketing, operations, and lifestyle services, tailored to your needs.
Greenhill provides discreet, tailored support that brings clarity, coordination, and momentum to complex priorities.
Business Development & Networking Executive & Operational Management
Family Office Administration Strategic Advisory & Communications
Greenhill provides comprehensive services to support your organization's growth and strategic goals. From developing customized brand strategies to managing high-level business development efforts, we deliver the expertise needed to achieve success across various industries.
Beyond the event itself, we extend into every dimension of a discerning client's life:
Whatever the priority, Greenhill delivers trusted,
high-touch support with discretion and
precision.
Whether it’s a corporate conference, sponsorship of a marquee event, or a one-of-a-kind experience, Greenhill creates events that leave a lasting impression. From concept to execution, we engage audiences and deliver memorable experiences for client engagement programs of all sizes.
A native of Virginia, Connie Costas launched her event marketing career with the National Football League in London, England, where she assisted in the launch of the World League of American Football. She later moved to New York, continuing her work with NFL team owners, players, sports agents, and sponsors on television productions and marketing initiatives.
Connie’s career took a pivotal turn when she joined Goldman Sachs & Co., where she developed and implemented the firm’s first-ever global event marketing and sponsorship platform. This program included iconic events like The Masters, The Summer & Winter Olympics, The US Open Tennis Tournament, The US Open Golf Tournament, and The Ryder Cup.
Following her extensive career at Goldman Sachs, Connie founded Greenhill Agency to serve clients across a range of global integrated marketing projects and business development assignments. Having traveled to over 40 countries and lived abroad in both Asia and Europe, she has managed a wide array of global events, investor tours, sporting events, and corporate hospitality functions for Fortune 500 companies.
With more than 25 years of experience, Connie has a proven track record of building brands, executing business strategies, and developing global marketing campaigns from concept to execution.
Connie Costas
Principal
917-442-0209
connie@greenhillagency.com
Greenhill Agency is an outsource solution that assists clients in developing and executing business development and marketing programs.
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