Great, thank you, Stuart. Hello, everyone. I'll start on slide 10 with the Q4 results, then I'll hit fiscal year results, capital structure matters, and then finish with our guide for 2024. So first up, we were pleased to finish fiscal 2023 with a strong Q4. Top line grew 8% in the quarter, all organic, with amplified growth and profit. Adjusted EBITDA was up 20% with contributions from both business areas in volume and also in margins. I'll hit the drivers of this when I cover the segment slide here in a moment. Adjusted EPS was $0.69 for the quarter in line with expectations. Q4, ‘23 adjusted EPS does reflect considerably higher interest cost and a higher tax rate than the prior year quarter. Operating and free cash flow results finish strong, enabling a terrific full year outcome. As Stuart indicated earlier, cash performance was critical in building our treasury to enable us to fully settle the convertible maturity and warrants and get that out of the way as we enter into 2024. Over to slide 11, for the full year all metrics were on or above our plan and also consistent with our long-term targets, so we're very pleased with that. Revenue was just about at $7 billion for the year, just a hair under, up 11% over 2022 on an ex-OAW basis, and up 6% without that adjustment. Adjusted EBITDA grew to $747 million, that's up 12% over last year, driven by 50 basis points of adjusted EBITDA margin improvement. This improvement was attributed to excellent project execution across the board and greater growth contribution, favorable project mix, and economies of scale from sustainable tech. Adjusted EPS was up 7% for the year and in line with our original guide for 2023. In the end, it was pleasing to see our operations over-perform on the EBITDA line to offset about $20 million of unplanned headwind in interest expense. Operating cash flow of $463 million was one of the highlights of the year. We over-performed here relative to our guide with more client advances received in STS and better than expected accounts receivable collections across the board in Q4. The team really worked hard and well together to lower DSO all year and also negotiate favorable cash terms on new contracts. This result underscores our quality of earnings and also client satisfaction across both segments. As I will discuss further in a moment, advances and strong collections are probably accelerations to some degree, so we expect to see some flip side of this in 2024. Now on to slide 12 for segment performance. I'll start with STS. As we have mentioned a number of times, our focus in this segment is EBITDA growth, which includes after tax equity and earnings from unconsolidated joint ventures, for which we report no revenue. As seen on the left, Q4 was a continuation of a stellar year for STS. We're seeing strong global demand for energy security requirements, decarbonization solutions, and a new energy transition enablers that we provide. Our business model in STS provides a good demonstration of the ability to quickly convert demand to EBITDA in leveraging IP licensing, product sales, and quick ramp up on sustainable services all simultaneously. STS finished the year with ongoing growth plus superb margins and cash flow with new business bookings paving the way for more success in 2024. Adjusted EBITDA growth was 42% in the quarter. All parts of STS are contributing to this result across offerings like licensing, equipment, design and engineering services, and also across multiple geographies and multiple verticals like ammonia, chemicals, olefins, and various emerging areas. For the full year, adjusted EBITDA was up 50% for all the same reasons as we had in Q4. Geographically revenue in the Middle East and Europe was up about 37%. US was up about 11%. And Asia and the rest of the world was up about 44%. So STS indeed is a global business. Over to the government segment on slide 13. Q4 revenues were up 6%, with adjusted EBITDA up 8% on improved margins. Growth drivers were Defense and Intel and also International up 22% and 15% respectively. Within these bright spots were a resumed pace on DEM-Shorad, Stuart mentioned that earlier. Terrific growth in Defense and Intel on advanced technology projects funded under the RDT&E budget across our expansive IDIQ portfolio and also continued excellent performance by our Frazer-Nash technical consulting platform. Science and Space had modest growth with the Fed's SIV budget constrained by the continuing resolution. Readiness and sustainment pulled back with reductions in the European Command Theater. We tied this directly to the funding debate in Congress on military support levels to Ukraine. For the year, revenues were up 7% ex-OAW with margins at 10% in line with expectations. Earlier in the year, readiness and sustainment drove quite a bit of growth while Defense and Intel and International lag due to the DEM-Shorad delays now resolved and the government turnover implications in Australia. As you saw in Q4, it's good to see D&I and International return to higher growth to offset the political issues we're dealing with in readiness and sustainment in Ukraine. This is a clear demonstration of the strength and resiliency of our well-diversified Government Solutions business. So that summarizes the P&L. Let's move over to slide 14 for cash flow and capital structure matters. In 2023, we used cash in three main ways. We retired two risks, the convertible notes and warrants, and also the legacy legal matter. The third use was returning about $210 million of funds to shareholders via buybacks and dividends. As Stuart said earlier, we were pleased to be able to lean forward and resolve all elements of the convertible either on time or in advance, and doing so without dilution so that we would not carry this overhanging to 2024. So that's done. The convertible notes and warrants, the legal matter, and the return of capital to shareholders used about $950 million in cash. Quite amazingly, with adjusted EBITDA growth, strong free cash flow, and by tapping repatriated cash, we finished 2023 with a net leverage ratio of 2.1 flat from last year. No change year-over-year after all of that deployment. So we think this is quite an accomplishment and means we manage these various deployments without strapping us with burdensome debt going forward. In January of this year, with the convertible notes out of the way and with favorable signals that we got from the Fed in late December, actually, we jumped on the opportunity to refinance much of our debt. The details are provided in recently filed 8-Ks, but to summarize, first, we had a cluster of debt maturities in 2026 and 2027. In the refinancing, we pushed those out to 2029 and 2031, mitigating our maturity risk substantially. And second, while keeping total debt neutral, we upsized the longer term maturity term, loan B, and freed up almost all of our $1 billion revolver availability. So that move enhanced the capital deployment option significantly moving forward. The combination of taking care of the convertible and refinancing of the loans is a boost to our capital structure and certainly better supports our growth strategy going forward. In terms of the strategy for capital deployment going forward, our priorities are not changed, but our options are clearly more robust with the recent actions we've just taken. For a long time, we have committed to paying an attractive level of dividends while also holding leverage levels at responsible numbers. We've also sought to keep payout ratios relatively constant as we generate net income and free cash flow growth. In line with this and in conjunction with initiating our 2024 guidance with continued growth, we are increasing our annual regular dividend from $0.54 per share to $0.60 per share. This will take effect the next record date of March 15. This marks the fifth year in a row of increasing our dividend by a significant amount. Deployable capital after dividends will be directed toward either M&A, buybacks and or debt reduction based on our view of the best long-term contribution to shareholder value. And finally, to maximize flexibility, our board has just approved replenishing our stock buyback authorization to $500 million. I'll finish up with our guidance for 2024 on slide 15. We are pleased to again set expectations for ongoing growth in profits and cash flow, reflecting healthy end markets, strong offerings and new business momentum coming out of 2023. We expect revenues in the $7.4 billion to $7.7 billion and adjusted EBITDA in the $810 million to $850 million range. The midpoint in the adjusted EBITDA reflects a growth rate of 11% over 2023. We expect adjusted EPS in the range of $3.10 to $3.30 which represents a growth rate of 10% at the midpoint. The adjusted EPS guide reflects about $15 million more of interest expense over 2023 primarily from higher rates. The guide also assumes a higher tax rate in the 25% to 27% range. As I said last quarter this is due to higher international mix. Share account is assumed at 135 million units which excludes capital deployment, but includes a modest level of repurchases to offset our annual share count creep. As for timing, we expect about 45% of adjusted EPS in the first half, 55% in the second. This is due to expected timing of projects, including work in Europe due to the continuing resolution and funding for Ukraine as well as the HomeSafe ramp and the overall growth trend in our business. For adjusted operating cash flow, we exceeded expectations in 2023, which did include some cash advances in STS in Q4 and also strong collections in government as well. As said earlier, there's about a $20 million give back on this to 2024, but our guide is still up with for the range of $450 million to $480 million of operating cash flow for 2024. In sum, there are a few highlights worth reemphasizing here. First, we met or exceeded all key financial metrics in 2023 with overperformance in adjusted EBITDA generation, which I said offset some of the interest expense headwinds we had. And second, over the course of 2023 and so far in 2024, we've de-risked our future in several ways. We continue to demonstrate superb cash flow production, which opened up opportunities to improve our capital structure for the future. That included settling our convertible notes and warrants and also settling legacy legal matter and finally extending and improving our credit facilities. The third point I'd emphasize is our core business momentum and recent bookings does indeed drive growth plans for 2024 and well beyond that. Those elements together enable an attractive growth outlook for 2024, a catalyst for attractive growth again in 2025, including a meaningful plans ramp on HomeSafe and a more flexible capital structure to expand deployment opportunities which represent an upside to our outlook. Thanks for your patience through all of that. Now back to Stuart to wrap it up. Stuart?