What's Happening

Cornerstone's corporate office is located in Summerville, South Carolina. This office is the hub for all the work that Cornerstone does. 

All managers and agents are trained from this location and this is where administration handles the processing of all new business. 

When new representatives are hired, our Human Resources department works from the corporate location to assist them in obtaining an insurance license and/or becoming contracted with the hundreds of companies we represent. 

Our CEO calls the Corporate office home, and this is where we plan office functions and events! 

Our large 40+ seat conference room provides a great location for sales meetings and other trainings. Even those working in our branches in other parts of the state can benefit from meetings held in our conference room, since it's equipped with technology that allows us to share online, the events happening in that room! 

Two other conference rooms plus multiple offices also make the corporate office a great place to have client meetings.

Managing Partner

Gregory Gutowski



Sales Manager

Scott Grow


843-376-3350 x 405 

What's Happening

To further expand the products and services that Cornerstone has to offer, we recently partnered with an agency in Columbia South Carolina. Strategic Wealth Assurance, managed by Gregory Gutowski and Ty Erving brings the same great products and services to clients in the Columbia area. Agents out of our Columbia office receive the same training and certification that all Cornerstone agents are known for, meaning they are able to provide the very best information and education to their clients, along with quality products at affordable rates! 

Cornerstone is proud to have this new connection! 

Read more about these new managers below!


I Moved from Pittsburgh, PA to Lexington, SC in 2014. I have been married to my wife Susan since 2003 and we have one child, Gregory II. We are in love with South Carolina and are happy to call it home. I’ve been in the industry since 2004, am a LUTCF and a CLF (Chartered Leadership Fellow), hold a series 7 & 66, member of GAMA and NAIFA. I sit on the Leaders of Today and Tomorrow (LOTT) committee with GAMA. 


​I was Born and raised in the Midlands. I am a football letterman and graduate of the University of South Carolina. With over 7 years experience in the industry, I have a passion for helping producers build successful practices through client-focused financial planning.

I enjoy spending time with my family and watching Gamecocks athletics. I reside with my wife Kathryn in Columbia with my two children, Emery and Tyson. 

CEO/Managing Partner

Michael Haskett


843-376-3350 x 302

Sales Manager

Orion Irby



Sales Manager

Sheldon (Ty) Erving



Executive Marketing Assistant 

April williamson


843-376-3350 x 301

Midlands office

Columbia, SC 


Branch Manager: Gregory Gutowski

Phone: 814-602-1618

Email: administration@cswta.com  


Patreice Fountain


843-376-3350 x 333

Operations Manager

John Bankowski


843-376-3350 x 320

Managing Partner

James "Calvin" Culbertson


866-262-2245 x 600

Upstate office

1076 East Jerry Road
Laurens, SC  29360

Branch Manager: Calvin Culbertson 

Phone: 864-990-0469

Email: administration@cswta.com  

What's Happening

Cornerstone's office in Laurens, South Carolina is our business hub for the entire Upstate area. 

Upstate agents work out as far as Clemson and Greenville, focusing their efforts on helping clients in the upper part of the state with their retirement planning needs. 

Branch Manager, Calvin Culbertson keeps his office in complete congruence with the Summerville location, making sure that meetings and trainings for his team coordinate with corporate standards. 

Though a smaller group than the Summerville office, the agents have the same diversity, combining veteran "founders" of the company with new rookies in training. 

The office is also used as a client meeting place. Representatives can be reached at this location on Tuesdays and Fridays from 9 am to 5 pm EST. 

Managing Partner

David Armbruster


843-376-3350 x 309

What's Happening

The Lowcountry, South Carolina office of Cornerstone is located in the same building as the Corporate office. Housing over 40 licensed Insurance Agents, as well as a large management team, this group has a little bit of everything. Some of the agents have been with the company since its founding in 2007, while others have recently joined the business and are currently in training. 

Due to its close proximity to the corporate office, Summerville has the advantage of direct contact with the executive team and also many great opportunities to try out new programs and products first. Sometimes these agents are able to help with the development of our ever-evolving systems and procedures. 

Clients located in the Lowcountry are able to come to this location for free seminars and workshops, as well as to meet directly with agents or managers if they prefer an office setting to their home. 

Lowcountry Office

89 B Old Trolley Road; Suite 200 

Summerville, SC 29485


Branch Manager: David Armbruster

Phone: 843-376-3350

Email: administration@cswta.com  

Contact Us

corporate Office

89 B Old Trolley  Road; Suite 200

Summerville, SC 29485


Phone: 866-262-2245

Email: administration@cswta.com