Our Team

3SI consultants share our clients’ goal: we strive to achieve a positive social impact by improving the lives of individuals and communities.
In pursuit of these goals, we work as individuals or in small teams and are accustomed to highly fluid, fast-paced work environments.
Chris Strausz-Clark,                                                    Managing Principal

Chris Strausz-Clark, Managing Principal

Chris Strausz-Clark leads 3SI’s consulting practice. He provides strategic counsel, program analytics, and data management to philanthropic, not-for-profit, and government clients. Chris’ experience combines a decade in philanthropy with a background in business, finance, and investing. Prior to founding his consulting practice in 2009, Chris spent six years at the Bill and Melinda Gates Foundation....
Jon Oakdale, Principal

Jon Oakdale, Principal

Jonathan Oakdale leads 3SI’s data systems and technology work as a Principal for 3SI.   Mr. Oakdale has spent the past 13 years providing financial analysis and systems development services for non-profit, government, and corporate organizations, including national and international firms. Jonathan brings to 3SI deep knowledge of Financial Analysis (such as tracking, budgeting, forecasting, and...
Aradhana Roy, Senior Advisor

Aradhana Roy, Senior Advisor

Dr. Aradhana Roy provides strategy, research, program management, and data analytics services as a Senior Advisor to 3SI. Her work  includes concept development, program management and monitoring, due diligence, performance evaluation, program analytics, and financial and operational planning. Aradhana has worked extensively with agricultural development organizations. Her focus areas are knowledge access, input delivery, market...
Phil Sirinides, Senior Advisor

Phil Sirinides, Senior Advisor

Dr. Phil Sirinides is a statistician and researcher with expertise in the application of quantitative research methods and the development and use of integrated data systems for public-sector planning and evaluation. He provides research and data analysis as Principal Advisor to 3SI. His interests include early childhood programming, educational leadership, accountability policy, and comprehensive school...
George Rickus, Senior Advisor

George Rickus, Senior Advisor

George Rickus has expertise in business planning and analysis, and provides strategic framing and problem solving support to 3SI as a Senior Consultant.   George is a former consultant at Bain & Company, where his work included client engagements in growth strategy, organizational design, and performance improvement.  While at Bain, he also compiled the firm’s historical...
Denise Carlson, Director of Operations

Denise Carlson, Director of Operations

Denise Carlson leads the business and office operations for 3SI. Prior to joining the firm, Denise managed business operations in multiple departments for a local area credit union.  She has over 20 years’ experience in business operations, including office operations, staff coaching and development, sales and service, accounting and finance, mortgage and consumer lending, retail...
Joelle Gruber, Manager

Joelle Gruber, Manager

Joelle Gruber leads 3SI’s program evaluation work, assisting clients on the important journey from articulating goals and objectives to enhancing program effectiveness.   She brings an expertise in mixed-methods quantitative research to her projects. Joelle has worked in the field of evaluation for nearly 15 years, most recently at JPMorgan Chase where she designed and implemented...
Gena Peth, Manager

Gena Peth, Manager

Gena Peth provides data management and technology development services for 3SI.  Gena has over 20 years of data systems experience in the non-profit and health care sectors.  She is a successful Data Systems Manager with proven skills in SQL database architecture and data management, and she holds a particular passion for data analytics. Gena has...
Ross Gilliland, Manager

Ross Gilliland, Manager

Ross Gilliland performs evaluation and analytics at 3SI. He has nearly 10 years of professional experience in the non-profit and agency sectors, with experience in both the program evaluation and data analytics fields. A major focus of this work has been on the interpretation and persuasive communication of analysis to both technical and lay audiences....
Graham Bearden, Senior Consultant

Graham Bearden, Senior Consultant

At 3SI, Graham Bearden splits his time between technology and analytics projects. He works proficiently with a variety of technologies, including R, SQL, and Tableau, and dabbles in others. Graham provides expertise across the full spectrum of data analytics processes. He offers elegant solutions to complex data puzzles and has significant experience building customized, interactive data exploration tools....
Diana Grusczynski, Senior Consultant

Diana Grusczynski, Senior Consultant

Diana Grusczynski brings to 3SI an expertise in public policy and finance to help organizations improve program performance. She is an experienced consultant who utilizes data to inform public policy, assess investment alternatives, and foster market development. Diana right-sizes project evaluation for a range of interventions, institutional settings, and budgets utilizing quantitative and qualitative methods. Until...
Carl Petrillo, Consultant

Carl Petrillo, Consultant

Carl Petrillo supports 3SI’s analytics and evaluation projects across a variety of tasks that span quality assurance, research, and documentation. Prior to joining 3SI, Carl worked as a business analyst for CGI, where he provided design, testing, and project management support for two large software implementations for the State of Alaska. Additionally, Carl has worked...